CARVIN DCA300 Pro Line Professional Amplifiers Instruction Manual

CARVIN DCA300 Pro Line Professional Amplifiers

Product Information

Specifications

• Manufacturer : Manual Hub
• Model : [insert model name]
• Dimensions : [insert dimensions]
• Weight : [insert weight]
• Power Source : [insert power source]
• Color : [insert color]

Description
The [insert model name] is a versatile and user-friendly product designed to [insert product purpose]. It offers a range of features and functions that make it suitable for various applications.

Key Features

• [Feature 1]: [Brief description of feature 1]
• [Feature 2]: [Brief description of feature 2]
• [Featu re 3]: [Brief description of feature 3]
• [Feature 4]: [Brief description of feature 4]

Included Accessories

• [Accessory 1]: [Brief description of accessory 1]
• [Accessory 2]: [Brief description of accessory 2]
• [Accessory 3] : [Brief description of accessory 3]

Product Usage Instructions

1. Step 1: Unboxing and Setup
2. Remove the product from its packaging carefully.
3. Check if all the included accessories are present.
4. Place the product on a stable surface.
5. Connect the power source to the product.
6. Step 2: Basic Operation
7. Familiarize yourself with the control panel and buttons.
8. Turn on the product using the power button.
9. Follow the on-screen instructions or refer to the user manual for specific functions.
10. Step 3: Advanced Features
11. Explore the different modes and settings available.
12. Adjust the [specific feature] to your preference.
13.  Utilize the [specific feature] for enhanced performance.
14. Step 4: Maintenance and Cleaning
15. Ensure the product is turned off and unplugged before cleaning.
16. Use a soft cloth dampened with water or a mild cleaning solution to wipe the exterior surfaces.
17. Avoid using abrasive materials that may scratch the product.
18. Regularly clean any dust or debris from vents or openings to prevent overheating.
19. Step 5: Troubleshooting
    If you encounter any issues with the product, refer to the troubleshooting section of the user manual or contact our customer support for assistance.

Frequently Asked Questions (FAQ)

1. Q: How do I update the firmware of the product?
   A: To update the firmware, please follow these steps:

2. Visit our official website and navigate to the “Support” or “Downloads” section.

3. Locate the firmware update file for your specific model and download it.

4. Transfer the firmware update file to a USB drive.

5. Connect the USB drive to the product’s USB port.

6. Access the product’s settings menu and navigate to the firmware update section.

7. Select the option to update the firmware from the USB drive.

8. Follow the on-screen instructions to complete the firmware update process.

9. Q: Can I use the product with other devices?
   A: Yes, the product is compatible with a wide range of devices including smartphones, tablets, computers, and more. Simply connect your device to the product using the appropriate cables or wireless connection methods.

10. Q: How long is the warranty period?
    A: The warranty period for the product is [insert number] years from the date of purchase. Please refer to the warranty card or user manual for more details on warranty coverage and terms.

Pro Line Professional Amplifiers

• Please Read Before Operating Your Carvin Power Amplifier UNPACKING Carefully remove by opening the carton and holding the carton flaps out. Turn the carton upside down (referenced by the lettering on the outside of the box) and lift it off. Now turn the product right-side up. In the event the amp is moved or re-shipped “ALWAYS” use the original carton and packing material. If not, structural damage could deface the unit. Carvin or the Shipping Company will not be liable. SAVE ALL PACKING MATERIALS! Also, keep your in. voice as it will be required for warranty servicing. If you did not receive all the items you ordered, allow several extra days as your order may have been separated in shipping.

• INSPECTION
  Inspect the unit for damage that may have occurred in transit. If damage is found, notify the transportation company immediately, and file a damage claim. The claim must be instituted by yourself, the consignee. Save all car- tons for proof of damage. Please notify Carvin of any damage done.

• AMP SET-UP – Do Not Turn On Yet!
  The Carvin Power Amp is designed for “table top” or “rack mounting”. The Four rubber feet may be removed if amps are to be stacked in a rack. Sufficient airflow must be provided, since air is drawn through the rear and exhausted through the side vents. The rack must have an open back. Do Not Operate the amplifier with the cover off (this will defeat the cooling system).

• AMP POWER-UP
  Connect the required input and speaker cables. Use the Input Mode Switch chart on the next pages to determine the proper mode switch to select for the amps desired function. Turn the A & B GAIN Controls down. Turn the amp ON and listen for the speaker relay to click on. Now turn the Gain Controls up and you should be running.
  IMPORTANT

  • A. Do Not use Shielded or Coax cables for speakers.
  • B. Read paragraph 11 about Speaker Output Fusing.
  • C. Use your amplifier with common sense. This amp delivers enough power to harm any speaker.

AMP CIRCUIT DESCRIPTION

• The Carvin Professional Series Amplifier is one of the most advanced designs currently on the market. Unique design features make Carvin Amps virtually FAIL SAFE and free from accidental damage. A fast acting relay safeguards your speakers should there be a malfunction of D.C. voltage of more than 8 volts at the output: A time delay within the relay circuit postpones the signal to the speaker until the amp reaches its operating level, thus eliminating any unwanted pops or noises. Thermostatic controls monitor the amp’s temperature continuously for any unsafe operating conditions. If such a condition exists, these controls will quickly turn the speakers off. Advanced power amp circuitry employs wideband “Full
• Complementary” devices featuring triple diffused emitters for high safe operating areas. Not only are these devices fail-safe, but they offer the purest sound obtainable. THD distortion is almost unmeasurable, and guaranteed to be less than 0.05% with typical THD at 0.01%. These amplifiers maintain high accuracy and low THD by incorporating a high ratio of open-loop to closed-loop feedback networks. Thermal-tracing bias circuitry continually monitors the output stage to keep your amp running cool. The mechanical design of your new amplifier is unlike ordinary amplifiers. The anodized heat-sinks and power transistors are modular designed to facilitate easy removal for servicing or exchange. Carefully  thought-out wiring design incorporates military-type wire harnesses with Heavy-Duty pin connectors. All P.C. boards are ridges G10 fiberglass.
• The reinforced 16 gauge steel chassis and anodized aluminum front panel offer exceptional structural reinforcement. Your Carvin amp is designed to give years of trouble-free service. If you have further questions about your amp or need hook-up assistance, please call or write us.

Amplifier Operation

FRONT PANEL

1. POWER SWIT CH Push for ON. A speaker protection relay will engage the speakers within 3 seconds to mute any “turn-on” transients or pops. Push again for OFF. The protection will instantly disengage speakers eliminating any “turn-off” pops or noise.

2. The LED above the power switch denotes that there is power to the amp when turned on. 3, A & B

3. LEVEL GAIN CONTROLS allow the operator to adjust the sensitivity of the power amp to match the mixer output levelsly adjust the Gain controls: set amplifier Gain to zero, set mixer or pre-amp master volume at mid position and raise amplifier gain for maximum volume desired. After adjustment, use mixer or pre-amp master volume control to control the power amplifier.
   Note: This usually gives the best signal-to-noise ratio.

4. LED CLIP INDICATORS are featured on both the DCA800 and DCA300 amplifiers. These LED “clip” indicators will start to flash when the amp runs out of clean power, giving you a very accurate indication when distortion starts. These indicators monitor the amps feedback circuits which will cause the Clip LED’s to light at the instant your amplifier begins to clip. These “clip” indicators also function as a method to monitor the thermal condition of your amplifier. Also, an inadvertent short-circuited output (with signal) will cause the CLIP LED to remain on until the short is removed.

5. THERMOSTATIC CONTROL S are provided on each modular Heat-Sink assembly to turn the amp off if it should ever become over heated because of improper ventilation. The “clip” indicators are designed to light if this condition should ever exist.
   REAR PANEL

6. LINE CORD All Carvin equipment is supplied with 3-conductor line cords, ending in grounding type plugs. This arrangement will greatly reduce the possibility of electrical shock when used with proper 3-conductor outlets.

7. The GROUND SWITCH enables the operator to remove the A.C. line ground off the chassis. This totally isolates the amps ground system. Select this switch for the quietest hum position.

8. PRIMARY FUSE AND DCA800 VOLTAGE SWITCH. All DCA800 amplifiers are wired for 120 VAC and are fused at 15 amps pitte, in ere use i see the and eling the proper ole. The CAs requires a 4a be we true line cord and  employs a computer-grade fan. However, you will notice some increase of fan noise in time. This is normal. These fans are designed for continuous operation.

9. SPEAKER OUTPUTS Each amplifier’s output has two Phone Jacks (wired in parallel) along with Dual 25 amp Banana plugs. Red denotes Positive and Black denotes negative speaker outputs.

10. OUTPUT FUSES are offered for added speaker protection. However, the 10AGC fuse supplied with your amp is too large to protect any speaker. This large value is supplied because some speaker systems like Carvin have their own protection. If you wish protection, remove the 10AGC and install the following suggested fuse values.

11. A. ¾ AGC Fuse for Horn Drivers up to 50 Watts (Bi-Amped).

12. B. 1AGC Fuse for Horn Drivers up to 50 Watts using a Passive Crossover.

13. C. 2½ AGC Fuse for Woofer rated between 100 and 150 Watts.

14. D. 2½ AGC Fuse for 2 or 3 Way speaker system rated at 100 Watts These approximate fuse values are for 8 Ohm speakers. Double all fuse values when paralleling speakers speakers together. CAUTION This amplifier is powerful enough to destroy any speaker. The above fuse recommendations can only be used as a PROCEED WITH CAUTION: WE ASSUME NO RESPONSIBILITY FOR ANY DAMAGE DONE TO SPEAKERS REGARDLESS OF

15. AMPLIFIER BRIDGING is only recommended for high powered monaural applications. To bridge your amp follow the below A. Connect your speaker load across both “Red” speaker terminal posts (A&B Channels) The RED terminal post A is positive and the RED terminal post B red post is negative. The Black terminals are not used. B. Locate the rubber cap next to the Fan Switch. Remove this cap and with a screw driver move the switch “down” to Bridge Mode. the fun position the A amplifier. Use the A gain control for setting your levels.
    Note: The B gain control must also be turned to

16. INPUTS Your amplifier will accept either a Balanced Line through the D3F connector or an Unbalanced Line through the Phone Jack. The D3F Connector Wiring: Pin 1 is Ground, Pin 2 is Negative Bal., Pin 3 is Positive Bal. The Balanced cirucit features a transformerless Differential Amplifier designed for balanced lines down to 150 Ohms. Impedances as high as 50,000 Ohms can also be used but with some loss of high frequencies. The transformerless design incorporated offers superior THD and Frequency Response over conventional inputs.

LIMITED WARRANTY

• Your Carvin Professional Series Product is protected against failure for 1 YEAR.
• Carvin will service the unit, supply all parts, and pay the RETURN shipping charges at no charge to the customer providing the unit is under warranty.
• At no time will Carvin pay for Servicing or Parts except our own.
• This warranty is extended to the original purchaser only (not transferable) and does not cover failures by incorrect use, inadequate care of unit, or natural disasters. A copy of the original invoice must be shown to verity warranty. Carvin takes no responsibility for any horn driver or speaker damaged by this unit. This warranty is in lieu of all other warranties, expressed or implied, and no representative or person is authorized to represent or assume for Carvin any liability in connection with the sale or servicing of Carvin products.

FACTORY SERVICING

We highly recommend utilizing our specialized servicing staff to bring your unit up to factory specifications. For Factory servicing “In” or “Out” of Warranty follow these requirements:

1. 2. Enclose a full description of the malfunction. Use the “Service Authorization Form” included with this manual.
2. Include a copy of the original invoice to verify warranty.
3. Return the product in its original carton. Carvin and the Shipping Co. are not liable for damage caused by improper packing. Ship by United Parcel Service if possible. The shipment must be pre-paid by the customer.
4. Allow 5 working days for servicing plus shipping time to and from destination. All repairs in by Monday are ready the following Monday.
5. Carvin will pre-pay the shipping back to you providing the unit is under warranty. If you wish return shipment by AIR, you will be required to pay the difference COD.
6. If your unit is out of warranty, you will be charged a modest fee (generally lower than repair shops). You will also be required to pay shipping both ways. These charges will be collected COD.
7. If in doubt about the malfunction, please call a Carvin salesman first at 714-747-1710 as we’ve had units returned just because there was a oversight on its use or hookup.

SERVICING IN YOUR AREA

• You may select your own service center or nave your qualitied technician work on ten unit at your own expense. Ines will not void the warranty for future repairs by us unless damage was done because of improper servicing or components. It damage was done, a normal fee for parts and servicing will be charged.
• Under the 1 Year Warranty, Carvin will ship parts pre-paid to you or your technician providing the defective parts) are returned first for our inspection. If you do not have a qualified service person, we ask that you don’t involve yourself in servicing the unit.
• By sending the unit back to us, you may save time and money in the long run, plus your unit will be factory serviced. Reminder: Carvin Does Not Pay for Servicing or Parts except our own – No Exceptions.
• If you elect to have your own servicing done, these bills must be paid by you.

DCA800 DCA300 Pro Line Professional Amplifiers

• Section #7_ (Important! – Must Read) includes facts about the use of the DCA/DCM series amps, specific precautions, how to initially set up and power up the amp. This information section offers important to the reliable and safe operation of the high powered DCA/DCM series amplifiers. It is highly recommended reading for operators.
• Section #8 (Connections to the Amplifier) offers information relating to the various types of connections made to the amp. In this section, special uses such as bridging, hawking up 3 and I way systems will be discussed. and
• Section #9 (Bi-Imping & Tri-Amping) covers the basic differences between conventional and Bi-amped sound systems. differences between Bi-amping and Iri-amping as well as information covering the use of the active crossover in a Bi/Tri-amped situation is covered. the
• Section #10 (Service and Technical Information) includes technical specifications, circuit schematics, diagrams for a detailed overview of the design, and black construction and performance of the DCA/DCM series amplifiers. Should the amplifier the ever require servicing this section should provide all needed information for a service technician.
• Section #11 (Sercive & Warranty Information) offers information about the warranty and return procedures for the amplifier. This section should be consulted for any units returned for factory servicing, or any servicing in your area. caused by improper packing. From CARVIN at $14.00 dollars ea. (Replacement cartons are available & 52.00 shipping).
• Save your invoice. It want be required for warranty servicing of your unit in the event such servicing 15 necessary. Always check your invoice against unaccents you nave received. IF you find some items missing it may be that the were simply split up during shipment. Please allow several days For the rese your order to arrive before inquiring. If you determine (after allowing an appropriate amount of time) that you have received all your items, please call CARUIN not in order that we may take the necessary steps to assure that you receive all the neumes in your order.
• CAUTION – TO PREVENT ELECTRIC SHOCK DO NOT DEFEAT THE SAFETY GROUND CORD.
• WARNING – TO PREVENT FIRE OR SHOCK HAZARD. DO NOT EXPOSE IU RAIN, MOISTURE, EXPLOSIVE ATMOSPHERE, OR INSTALL AN IMPROPER FUSE. TOLL FREE CALIF. (800)-542-6070 TOLL FREE NATIONAL (800)-854-2235
• Both series amplifiers also incorporate thermostatic protection on each modular output heatsink assembly. The temperature sensing devices will а1г cooling Conly turn on the automatic forced on DCA-800 model). Normally the fan will be ofF, until a higher “safe” heatsink temperature is reached. Then the Fan will turn on. This allows the DCA-800 amplifier to operate into heavy loads safely and efficiently. (The DCA-300, DCM-301 & DCM-151 amplifiers do not require a fan due to their generous heatsink ventilation. Both series down in the amplifiers will shut event of damaging high temperatures the “TEMP” light Indicated by on the front panel). They also incorporate short circuit protection that will limit the amps output voltage. This circuited provides a wide latitude of protection from short speaker lines. And, speaker Fuse Further protection. This each of the speaker outputs offer ensure the highest extra added protection will systems as well possible reliability for speaker as amplifier output circuitry.
• The inputs of all CARUIN Pro-Line amplifiers feature “XLR type” transtormerless, active balancing. This yields better Frequency transformer balanced inputs. balanced phone plug “line” inputs. These inputs will accommodate impedances of 150 to 50K ohms.
• All outputs feature either heavy binding posts. phone plugs. These or 1/4″ are high quality output jacks that will offer years of trouble free use.
• Both the DCA-800 and DCA-300 amplifiers are capable of being bridged for absolute maximum output wattage levels, ог for transformer distributed “70U” line systems. “Bridging the Amp” (See Section #E Information” For as well as Section #10″ Technical the further specs. on bridging & the performance of “DCA” amps and associated circuitry design).
• The DCA series mechanical design features all active audio circuit components carried on two modules, (one for each channel). (The DCM series amplifiers incorporate one heatsink module). These output “heatsink” modules are glass epoxy circuit board constructed using aluminum mechanically coupled to a large anodized heatsink. The vertical Fin arrangement and open grill assembly on each side of the amplifier convective cooling offers maximum up and away of all critical electronics, radiating heat from easily the amplifier. these modules is accomplished by simply The removal of removing the lid & then the four heatsink mounting screws (attaching chassis), and the heatsink to the amp removing the associated connection Found multi-pin electrical on each module. Spare output modules can be ordered From CARUIN output modules for instant amp repairs. DCA-800 & DCM-301 cost 5150 ea S4 shipping. DCA-300 & DCM-151 modules cost 5105 ea + S4 shipping.

FEATURES OF THE DCA SERIES AMPLIFIERS

••-FRONT PANEL•••

1.   POWER SWITCH – Pushing the power “Up” will apply power to your unit. The red “neon” light in the power switch will illuminate to indicate the power Sometimes the “neon” amplifier is operational light in the power turn on instantly switch will not when the switch is depressed. This is normal and does not affect the operation of the amplifier

2. TEMP – The temperature light (Just above the power switch will illuminate only when the amplifier has overheated. Under improper loading conditions, the “TEMP” light will illuminate to indicate that the amplifier has been shut down to properly cool itself. Allow approximately 15 minutes for the amplifier to cool down for normal operation. Then check to determine the reason for the over-heating.
   Note : IF the “Temp” light is consistently turning on you should check your system out thoroughly. This is an improper condition indicating that something 15 wrong.

3. A & B LEVEL GAIN CONTROLS – These controls allow the operator to adjust the sensitivity of the power amp to match the mixer (or pre-amp) output levels. These controls do not limit the amps output power, and maximum output levels can be achieved at settings less than full оп. А. To properly adjust the gain controls: Set the amplifier gain to zero. Set the mixer or pre-amp master volume to a “Mid” position. Now raise the amplifier gain to obtain the с. desired volume level. After adjustment, use the mixer or pre-amp level control to Note: The above adjust volume. to noise procedure usually delivers the best signal ratio.

4. LED CLIP INDICATORS – These “LED” clip indicators will light when the amplifier begins to run out of clean power. They will give you an accurate indication of when distortion of the signal is monitor the input beginning. These indicators and output circuits of the amplifier offering an accurate indication of overloading. If the clip the indicators are lighting, any you should turn down either pre-amp (mixer) gain or the gain at the amplifier until the light just stops Flashing. These indicators feature a special stretch and hold bright indication of circuit that will provide a very clip indicators From overloads. Proper monitoring of the time to time will ensure that the cleanest possible signal is being fed to the amplifier.

REAR PANEL FEATURES

• R.u. LINE CURL – The UCA series amplifiers are supplied with 3 conductor line cords. This arrangement (3 pin grounding type plugs) greatly reduces the possibility of electrical shock when used with 3 conductor outlets. CNEVER DEFEAT THE 3RD PIN GROUND OF THE A.C. CORD). “Important! -Must Read” See section. The above grounding arrangement eliminates the need for a ground switch.
• THE A.C. PRIMARY MAIN FUSE – The DCA-800 amplifier utilizes a 15 amp fuse, whereas the DCA-300 utilizes a 5 amp fuse. These are standard “Slo-Blow” Fuses and may from a local vendor. be purchased of the A.C. Fuse. Never bypass or defeat the function The A.C. fuse offers the amplifier as well as your safety. protection both for IF you are consistently blowing A.C. main fuses you should consult the warranty service section of this manual and/or call CARUIN.
• SPEAKER OUTPUTS – Channel “A” and Channel “B” speaker outputs feature two 1/4″ phone plugs (wired This allows for in parallel). direct connection of 2 speakers to each side of the DCA series amplifiers. In addition to the 1/4″ two phone jack outputs, each channel also features dual 25 amp Bananna jacks. The Red denotes positive output and the Black denotes negative output. (See section #5 “Bridging the Amp” For additional uses of the Bandanna jacks.”
• OUTPUT FUSES – The output Fuses are offered For added speaker protection. However, the AGC 10 amp fuse provided with your unit is too large to protect any speaker. This value is supplied because some speaker systems like CARVIN’S does not have their own protection. IF speaker system have Fuse and protection, your you may remove the AGC 10 Cile replace it with the following suggested values. ( See Section #7 “Important! Fuse – Must Read” For additional information Fuse values
  • A : 3/4 amp fuse For horn drivers up to 50 watts (bi-amped).
  • B: AGC 1 amp Fuse For horn driver up to 50 watts using a passive crossover.
  • C: AGC 2.5 amp Fuse for woofer rated between 100 to 150 watts.
  • D: AGC 2.5 amp Fuse for 2 or 3 way speaker system rated at 100 watts.
• These approximate fuse values are extremely conservative, but should offer exceptional, volume levels with a wide safety margin. Note: You should double fuse values when paralleling speakers together. PROCEED WITH CAUTION – WE ASSUME NO RESPONSIBILITY FOR
• Many of the Front and rear panel features of the “DCM” series amplifiers are the same as found on the “DCA” series stereo amps. However, the DCM series amps are monaural (unlike the DCA series amps that are stereo). For those Features that are the same as found on the DCA amps we will refer you to the appropriate section dealing with the feature as it refers to the “DCA” amp.

FRONT PANEL

• POWER “DCA” SWITCH – See Section #5 “Front Panel Features Of series amps.

• TEMP – See Section #5 Front Panel Features of “DCA” series amps.

• GAIN – The “Gain” control on the DCM series amplifiers functions exactly as the A & B gain controls found on the “DCA” series stereo amps. on the “DCM amplifier The is only (1) “Gain” control because it is a monaural amplifier, and only one gain control is needed. procedures of For proper adjustment Features of this control see Section #5 DCA series amps.” “Front Panel

• LED CLIP INDICATOR – See Section #5 “Front Panel Features” for overview on the operation of the “Clip” indicator. ED IN/OUT – This button (when depressed) will assign the built-in graphic equalizer “in line.” This means that you will be able to switch between an equalized and non-equalized setting to compare any changes that may have been made. IF the amplifier will be used without the graphic equalizer function, leave the switch “out.” This disconnects Function the graphic from, the circuit and its 15| totally equalizer eliminated From the signal path.

• GRAPHIC EQUALIZER – The graphic equalizer provides a graphic representation of the overall levels of volume at various Frequency bands. Instead of calling each band “Bass, Midrange, or Treble,” each band is listed according to its exact Frequency reference. Therefore, the bands are Listed as 50Hz, 120Hz, 250Hz, 500Hz. 1K, 2K. чК, SK & 16K. These numbers refer to the exact band in which you will be adjusting the volume (within the full frequency spectrum›. Because there are a few more controls than Found on a standard (3) band equalizer, setting up a graphic equalizes may initially appear more difficult. point the best way However, at this to set your equalizer would be to experiment with each band to become Familiar with its respectively sound. Set each of the bands at “0” then boost

• SPEAKER OUTPUTS – The DCM series monitor amplifiers are a monaural amplifier. So, only one speaker output is required. This output features two 1/4″ speaker output jacks as well as 25 amp bannana plugs. These outputs are wired in parallel allowing (2) speakers to be connected directly to the outputs of the DCM series amp. Since these connections are wired in parallel you should consult Section #8 “Output Connections” for aditional information regarding parallel speaker loadings. Be careful not to excessively load the outputs of the DCM series amplifiers beyond (2) ohms. Consistent heavy loadings on the amplifier could affect reliability and overall performance. Loading your amplifier blow 4 ohms is not recommended. The 25 amp Bannana jacks are also output speaker connections. The “Red” terminal denotes the positive connection and “Black” terminal denotes the “Negative” output

• OUTPUT FUSE – See Section #5 “Rear Panel Features – DCA series amps” For a description of proper function and use. this feature and its

• INPUTS – See Section #5 amps For “Rear Panel Features “DCA” a description of the specs and use of this Feature. series

•  Both the DCA and DCM series amplifiers Feature thermostatic controls that will shut the become too hot. amp down if it should This offers appropriate protection from improper operating conditions. The Front “TEMP” light will come on to indicate that the amp has been shut down. Allow fifteen minutes for the amp to cool. Upon properly cooling down the amplifier will reset itself and again resume normal operation.
  Note: you should check to determine the reason for over-heating. Usual causes are poor ventilation, speaker impedance below recommended minimums, direct sun overheating the chassis, etc.

• You will note that both series amplifiers do not have a ground reversal switch. It has been eliminated to prevent shock hazard. All grounding is done through the ground lug of the 3 conductor A.C. plug. This is the safe and proper way to ground all electrical appliances. If for any reason you require an A.C. line phase reversal, you may do so by utilizing a 3 to 2 prong adaptor and flipping the plug. NEVER DEFEAT THE USE OF THE BRO PIN GROUND LUG ON THE AC RECEPTICLE. WHEN USING A 3 TO 2 PRONG ADAPTOR BE SURE THE GROUND LINE IS PROPERLY CONNECTED TO “GOOD” GROUND. THIS IS TO PROVIDE THE BEST MARGIN OF SAFETY AND PERFORMANCE FROM YOUR AMP.

• Always be sure A.C. voltage. you are plugging the amp into the proper sure the voltage is properly regulated will not fluctuate more than 10% above or below the 120U requirement of the DCA/OCM AMP. the amplifier is going to be powered From al generator, sure the generator has proper “electronic” voltage regulation and that the A.C. lines are free From voltage surges.
  Note: It is recommended that you use a surge suppressor and broad band noise supressor, especially when operating the amp generator. This will provide further protection against voltage surges and spikes. #8

• Whenever turning on or off your CARVIN amp you should Follow this rule: “Last on – First off.” This means that will turn on all associated pre-amp (mixers) and associated equipment prior to turning on the amp. with a performance, When you are finished the amplifier will be the first item shut down. Following this proceedure will help eliminate pops & power surges (created by preceding equipment) that are annoying to audiences and potentially harmful to speakers.

• Do not remove the amplifiers cover at any time while the amp is plugged in or powered up. THERE ARE POTENTIALLY LETHAL VOLTAGES INSIDE THE AMP.

AMP SET UP Do Not Turn On Yet!

• The DCA/DCM series amplifiers are designed for “table top” or “rack mounting.” are to be stacked. The four rubber feet may be removed if amps
• When “rack mounting” the amp, be sure to allow for sufficient air flow. The rack must have an open back to allow for the normal flow of hot air up and away from the rack.
• Make all connections to the amplifier (input and output) prior to turning on the unit. Be sure all cords are well maintained and of the proper type for the input and output connections to the amp. (A11 input connections should be shielded cable, and all output connections should be non-shielded 15AWG gauged wire or greater).

POWERING UP THE AMPLIFIER

• After all connections have been made to the amp, all the gain controls are fully counter clockwise (off). be sure Turn on all the pre-amp (mixer) equipment and then depress the power switch to apply power to the amp.
• Note: Be sure the amplifier is plugged into a properly rated A.C. source. (12OU regulated power supply source).
• Note: When the power switch is depressed the light in the Switch will come on to indicate the amp is operational. Sometimes there is a slight delay in the illumination of light within the switch, due to the characteristics of neon lights. This is normal of the amp. IF & does not affect normal operation the light does not illuminate, check to be sure the amplifier is plugged into a live power outlet or source. With all the pre-amp (mixer) controls fully off, turn up the the gain controls Chalf way up). to approximately the 12 o’clock position hiss. IF There should be no audible hum or excessive you do hear hum or excessive hiss, check your input and output cables as well as connections & gains of the pre-amp equipment driving your power acme.
• Now advance the pre-amplifier (mixer) gain until the desired volume 15 controls attained. Try to keep the pre-amp (mixer) at a minimum setting with the power amp controls at a relatively higher setting. This will help assure that the cleanest possible signal is driving the power amp. And, it helps assure the your system. best signal-to-noise performance From

IMPORIANT DIFFERENCES BETWEEN THE DOM AND DCA SERIES AMPLIFIERS

• In every respect is identical the operation of the 8CM series amplifiers to the DCA series (using one channel). amplifiers offer thermostatic protection against overheating Feature nearly identical signal specs. important The following and areas of consideration when operating your are a DCM series amplifier:  HE
• Please refer to Section “Important Must Read” For information regarding the reliable operation of your DOM series amplifier. This section (although targeted toward the DCA series amps) also refers directly to of the DCM series amps. the operation portion ot Also, read the “Precautions” that section for additional information on the reliable and safe operation of your new amp.
• Section #8 “Input” and “Output” connections also deals with information relating to the use of the DCM series amps. Reading over these areas of Section #B should help further clarify the use of the DCM series amps in a sound system and obtaining maximum performance and reliability farm your amp.
• Section #8 “Bridging the Amp” does not relate to the DCM series amps. internally bridged amplifier requires (2) power amp output sections. Since the DCM series amps are “Monaural” they do not have this capability of “internal bridging.” Section #8 “Hooking Up 3 & 9 way systems” deals with some pictorial examples of typical system setups. We have incorporated some examples using the DCM series amps For illustration.
• The Technical section of this manual contains sections dealing with the internal circuitry and design of both the DCA and DCM series amps. Should your unit ever require servicing this section should provide all the necessary Information. IF for any reason you require additional information, please feel free to contact CARVIN directly. Our sales & technical staff are sager to lend e hand.
• All service and warranty information are the same for both the ICA and DCM series amplifiers. questions in this area, please And. 1E you have any Feel Free to contact CARUIN.

BI-AMPING & TRI-AMPING DIFFERENCES BETWEEN CONVENTIONAL AND “PASSIVE” BI- AMPED/TRI- AMPED SOUND SYSTEMS

• We have discussed how to set up a conventional audio through one amplifier sound system where a full range signal passes and feeds a high level crossover within the speaker. This crossover then divides the “lows” from the “highs” and the outputs of the respective system are fed to the low In “bi-amping”, the crossover, receiving the output signal from the pre-amp outputs of your mixing, console. Internally, the active crossover divides the Signal into its frequency parts. crossover then ted to the ampere that directly The low frequency outputs of the drives the low drivers (woofers). frequency The high frequency output of the active amplifier crossover similarly feeds the dedicated to high frequency amplification, which drivers (horns).
• Bi-amplification drives the high frequency requires the use of a power amplifier dedicated to high frequencies as well as another power amplifier for the low frequency will deliver a clean sound drivers. minimal distortion and will more efficiently drive It the loudspeakers. the relative Bi-amping with will volume levels offer better control of the high and low frequency over the crossover points well components. as

BENEFITS OF BI-AMPING & TRI-AMPING

• Bi/Tri-Amping  conventional Passive protos over great denied of efficiency that is typically lost by a Conventional and crossovers utilize inductors, capacitors in their design. These electronic devices can affect the output of the power amplifier or waste much of its available output power. Since response or Tri-Amping| Bi-Amping circumvents these problem’s a more efficient delivery system. The components of a passive crossover greater of power from the amps to the speakers is achieved. This results efficiency from the sound used “In line” with the outputs of the power amplifier and they affect the which the amplifier responds. This interaction can reduce the damping of the amplifier (See damping in Glossary). amping bypasses the passive crossover more direct output from Bi- amplifier effectively the improving the damping performance of the system.
• Bi-Amping & Tri-Amping also provides real power output “Headroom” Higher frequencies advantages. “Ride” on top of the higher energy low frequencies being amplified. tend to ASI the output the amplifier begins reaching its total output power capacity these high frequencies may begin to reach the Peak output” of the amplifier before the low frequency
• Since the human ear material. This effectively clips the high frequency material. is very sensitive to high frequency frequency” distortion this type of “High clipping is very noticeable. By dividing the high and frequency materiel! prior to amplification by the systems power amplifiers low this headroom problem speakers are a to recommended settings for Bi-Amping and Tri-Amping Carvin’s
• If you have any questions regarding how many speakers you can run off your amplifier, please do not hesitate to call CARUIN. We will be more than happy to help you determining if you are operating your amplifier properly. Note: See Section #7 “Facts About Use” and Section #5 & #6 “Rear Panel Features” regarding speaker Fuses.
• HOCKING UP 3 & 4 WAY SYSTEMS There are several ways to hook-up the DCA series amplifiers with sound systems. In order to best illustrate the use of the DCA series amplifier with various systems we have created the following illustrations. In these illustrations you will find basic hook-ups utilizing the DCA series amps in passive systems, bi-amped, tri-amped, and four way systems.
• Although this section really does not go into the operation of the CARVIN amps, it will show you various configurations where the DCA/DCM series amps may be used in sound reinforcement systems. PASSIVE “FULL RANGE” DIAGRAM (Show Mon Conn.)
• BI-AMPED DIAGRAM TRI-AMPED DIAGRAM 4-WAY SYSTEM
• ILLUSTRATION OF DEA AS 70U LINE TRANSMITTION AMP

LIMITED WARRANTY

• Your Carvin Professional Series Product is protected against failure for 1 YEAR. Carvin will service the unit, supply all parts, and pay the RETURN shipping charges at no charge to the customer providing the unit is under warranty. At no time will Carvin pay for Servicing or Parts except our own. This warranty is extended to the original purchaser only (not transferable) and does not cover failures by incorrect use, inadequate care of unit, or natural disasters. A copy of the original invoice must be shown to verify warranty. Carvin takes no responsibility for any horn driver or speaker damaged by this unit.
• This warranty is in lieu of all other warranties, expressed or implied, and no representative or person is authorized to represent or assume for Carvin any liability in connection with the sale or servicing of Carvin products.

FACTORY SERVICING

We highly recommend utilizing our specialized servicing staff to bring your unit up to factory specifications. For Factory servicing “In” or “Out” of Warranty follow these requirements:

1. Enclose a full description of the malfunction.
2. Use the “Service Authorization Form” included with this manual.
3. Include a copy of the original invoice to verify warranty: Return the product in its original carton. Carvin and the Shipping Co. are not liable for damage caused by improper packing. Ship by United Parcel Service if possible. The shipment must be pre-paid by the customer.
4. Allow 5 working days for servicing plus shipping time to and from destination. All repairs in by Monday are ready the following Monday.
5. Carvin will pre-pay the shipping back to you providing the unit is under warranty. If you wish return shipment by AIR, you will be required to pay the difference COD.
6. If your unit is out of warranty, you will be charged a modest fee (generally lower than repair shops).
7. You will also be required to pay shipping both ways. These charges will be collected COD. If in doubt about the malfunction, please call a Carvin salesman first at 714-747-1710 as we’ve had units returned just because there was a oversight on its use or hookup.

SERVICING IN YOUR AREA

• You may select your own service center or have your qualified technician work on the unit at your own expense.
• This will not void the warranty for future repairs by us unless damage was done because of improper servicing or components. If damage was done, a normal fee for parts and servicing will be charged. Under the 1 Year Warranty, Carvin will ship parts prepaid to you or your technician providing the defective parts) are returned first for our inspection.
• If you do not have a qualified service person, we ask that you don’t involve yourself in servicing the unit. By sending the unit back 10 us, you may save time and money in the long run, plus your unit will be factory serviced
• Reminder: Carvin Does Not Pay for Servicing or Parts except our own No Exceptions. If you elect to have your own servicing done, these bills must be paid by you.

References

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