Yorkville M810 Powered Wedge Mixers Owner’s Manual

Yorkville M810 Powered Wedge Mixers

IMPORTANT SAFETY INSTRUCTIONS

This lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
The DO NOT STACK symbol is intended to alert the user that the product shall not be vertically stacked because of the nature of the product.
The exclamation point within an equilatereal triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.

FOLLOW ALL INSTRUCTIONS

Instructions pertaining to a risk of fire, electric shock, or injury to a person
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. THIS DEVICE IS FOR INDOOR USE ONLY! INSTALLED BATTERY PACKS SHALL NOT BE EXPOSED TO EXCESSIVE HEAT SUCH AS SUNSHINE, FIRE OR THE LIKE.

Read Instructions: The Owner’s Manual should be read and understood before operation of your unit. Please, save these instructions for future reference and heed all warnings.
Clean only with dry cloth.
Packaging: Keep the box and packaging materials, in case the unit needs to be returned for service.
Warning: To reduce the risk or fire or electric shock, do not expose this apparatus to rain or moisture. Do not use this apparatus near water!
Warning: When using electric products, basic precautions should always be followed, including the following:

Power Sources

Your unit should be connected to a power source only of the voltage specified in the owners manual or as marked on the unit. This unit has a polarized plug. Do not use with an extension cord or receptacle unless the plug can be fully inserted. Precautions should be taken so that the grounding scheme on the unit is not defeated. An apparatus with CLASS I construction shall be connected to a Mains socket outlet with a protective earthing connection. Where the MAINS plug or an appliance coupler is used as the disconnect device, the disconnect device shall remain readily operable.

Hazards

• Do not place this product on an unstable cart, stand, tripod, bracket or table. The product may fall, causing serious personal injury and serious damage to the product. Use only with cart, stand, tripod, bracket, or table recommended by the manufacturer or sold with the product. Follow the manufacturer’s instructions when installing the product and use mounting accessories recommended by the manufacturer. Only use attachments/accessories specified by the manufacturer
• Note: Prolonged use of headphones at a high volume may cause health damage on your ears.
• The apparatus should not be exposed to dripping or splashing water; no objects filled with liquids should be placed on the apparatus.
• Terminals marked with the “lightning bolt” are hazardous live; the external wiring connected to these terminals require installation by an instructed person or the use of ready made leads or cords.
• Ensure that proper ventilation is provided around the appliance. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. No naked flame sources, such as lighted candles, should be placed on the apparatus.

Power Cord

Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. The AC supply cord should be routed so that it is unlikely that it will be damaged. Protect the power cord from being walked on or pinched particularly at plugs. If the AC supply cord is damaged DO NOT OPERATE THE UNIT. To completely disconnect this apparatus from the AC Mains, disconnect the power supply cord plug from the AC receptacle. The mains plug of the power supply cord shall remain readily operable. Unplug this apparatus during lightning storms or when unused for long periods of time.

Service

The unit should be serviced only by qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped. Disconnect power before servicing!

IMPORTANT SAFETY INSTRUCTIONS

The Lightning Flash with arrowhead symbol within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product enclosure that may be of sufficient magnitude to constitute a risk of shock to persons
The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product

1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prongs are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
11. Only use attachments/accessories specified by the manufacturer.
12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.
13. Unplug this apparatus during lightning storms or when unused for long periods of time.
14.  Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as
    power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

WARNING:

• To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture and objects filled with liquids, such as vases, should not be placed on this apparatus.
• To completely disconnect this apparatus from the ac mains, disconnect the power supply cord plug from the ac receptacle.
• The mains plug of the power supply cord or appliance coupler shall remain readily accessible.

CAUTION: TO PREVENT ELECTRIC SHOCK HAZARD, DO NOT CONNECT TO MAINS POWER SUPPLY WHILE GRILLE IS REMOVED.

Introduction

Thank you for purchasing a Yorkville powered mixer. We at Yorkville Sound are confident that you’ll find the M810/M1610 to be an excellent and versatile mixer/amp. We’ve used our experience in the development of powered mixers to create the smallest, lightest, and most powerful combination mixer/amplifiers available. This manual contains infor-mation to help you get the maximum performance from your M810/M1610. We hope you’ll take the time to read it.

Stereo Power Amplifier

The M810/M1610 features high-efficiency stereo power amplifiers which have been designed to deliver maximum power into a 4-ohm load. When lower speaker impedances are connected, a dedicated, sonically transparent circuit limits the output power to safe levels. Multiple speakers may be connected without the amplifier overheating or shutting down.

Input Channels

MIC and LINE Inputs
The M810/M1610 features gold-plated dual-contact XLR low-impedance microphone connectors on the channels. These microphone inputs are bal-anced for maximum noise suppression. Condenser microphones can also be connected. The 48 Volt DC phantom power is activated by depressing the Phantom Power push-button on the rear panel.
Note: Condenser and dynamic mics can be used together while the phantom power is on. It will not affect the performance of the dynamic mics.

In addition to the XLR inputs, each channel features ¼-inch LINE in jacks. Channels
1-4, 7/8 and 9/10 are balanced line-level inputs and will accept either balanced (Tip/Ring/Sleeve) or unbalanced (Tip/Sleeve) input cables from high impedance microphones, mixer line outputs, keyboards, synthesizers, electric pianos etc.
Note: When connecting a balanced signal, use balanced patch cables with either an XLR or a Tip/Ring/Sleeve ¼-inch plug on the mixer end. Channels 5 and 6 have very high impedance, unbalanced ¼-inch inputs which are optimized for instruments such as electric basses, acoustic electric guitars etc. Stereo channels 7/8 and 9/10 have left and right ¼-inch balanced LINE in jacks as well as mono gold-plated XLR low impedance microphone inputs. The ¼-inch inputs may be used to connect a stereo CD player, tape deck or an additional mixer etc. A phono pre-amplifi-er must be connected to the M810/M1610 inputs for optimum turntable performance.
Connecting signals to both types of inputs on any one channel (MIC and LINE in) is not recom-mended. To do so may change the gain of the input circuit.
Note: You may connect a stereo source to channels 1 through 6 but you must use two chan-nels, one for left and one for right and Pan appropriately or sum to mono using a ‘Y’ cable.

Channel 1-6 TRIM Controls and SET LEDs
The first 6 mono channels of the M810/M1610 have been equipped with an input TRIM control and are also protected by an overload protection circuit. The TRIM controls are used to make sure that an ideal signal level is flowing through the channel, no matter what the input source. Each channel has a green LED that will flash when the proper signal level has been reached. The channel overload protection circuit will provide addi-tional protection from clipping on peaks of up to 16 dB above normal operating levels.

To set the TRIM

1. Turn down the channel LEVEL control,
2. With a normal signal present at the input, turn up the TRIM control until the green LED just starts to flash (when the signal peaks).
3. You can then use the LEVEL control to set the channel volume level. Increasing the TRIM beyond this point will compress the signal on that channel.

Channel LEVEL Controls and CLIP LEDs

This adjustment determines the signal level sent to the MAIN mixing bus. The CLIP LED will illuminate when the channel’s overall signal level is 3 dB below the onset of actual clipping. As a result, small amounts of clip LED activity are acceptable, however frequent or continuous activity indicates the need to turn down the LEVEL control.
In audio terminology, a bus is a mix-down channel where all the signals from the input chan-nels are blended into one signal. The M810/M1610 has 5 busses: MAIN (left and right), MONITOR, EFFECTS and RECORD OUT.

Channel Lo, Mid, and Hi Equalization

The M810/M1610 tone controls adjust the bass, middle and treble frequencies for each channel independently. Center frequencies have been carefully selected to help achieve the best quality of sound. Bass is centered on 40 Hz, Mid at 700 Hz and the Hi is at 12 kHz. The adjustment range for each control is +/- 15 dB. These parameters provide versatile equalization consistent with the clean simplicity of the M810/M1610’s design. As with equalizers, boosting one or more frequencies increase the channel’s level. If the channel is already at a high level, clipping may occur, in which case the clip LED will illuminate. Reduce the LEVEL setting and/or the Equalizer if clip activity is excessive.
Note: The center position reflects a neutral or flat EQ control setting; however, turning down EQ settings can be used effectively to reduce feedback and/or distortion).

Channel MON Controls

The MON control (monitor send) on each channel varies the amount of signal being sent to the monitor bus in the M810/M1610. In the mono channels the MON signal is pre-LEVEL control, post-EQ and post-TRIM. It is taken before the LEVEL control so the monitor signal can be mixed independently of the MAIN mix. As a result, channel EQ and TRIM settings do affect the sound of the monitor signals, while the channel LEVEL controls do not affect the MON signal. The MON signal in the stereo channels is pre-LEVEL and pre-EQ.
Note: With an independent monitor mix, it may be beneficial to connect a graphic equalizer between the MON output and the monitor amplifier (Power AMP IN B, external amplifier or powered speakers, depending on how you have it set up) to help control feedback.

Channel EFX Controls

The EFX control (effects send) for each channel adjusts the level of the channel signal being sent to the M810/M1610 effects bus. This signal is post- LEVEL control and post-EQ, the sound is affected by both the channel EQ controls and the channel LEVEL control. The signal from the effects bus is internally routed to the Digital Effects Processor. The channel EFX control regulates the intensity of the built-in digital effects for the channel’s output. When using the built-in digital effects, you can connect a standard on/off footswitch (e.g. Yorkville model IFS-1A) to the EFX Out/Footswitch jack to turn the internal effects on or off. For more information see the section EFX Out/Footswitch in this manual.
Tip: Alternatively, this signal at this jack can be connected to the input of an external stereo effects unit and returned via channel 7/8 or 9/10. However, if you do not require any effects at all, the effects bus output signal can be connected to the input of an additional monitor system or another amp/speaker system via the EFX Out/Footswitch jack using a standard balanced patch cord. In this case, the EFX controls would act as send controls to achieve a semi-sepa-rate mix. Remember that the channel LEVEL controls also affect this signal.

Channel Pan and Bal Controls

The signal balance of each channel going to the left and right main PA channels can be adjusted by the Pan control in channels 1 to 6, and by the Bal control in channels 7/8 and 9/10. Turning this control counterclockwise towards the L will increase the signal level in the left channel to a maximum of 3 dB while also reducing the level in the right channel to zero. Turning the control clockwise towards the R will increase the signal level in the right channel while also reducing the signal level in the left channel.

Master Section

MAIN Master Control
The MAIN master control adjusts the over- all level of the main mix, the PA volume.
Note: To ensure maximum signal head-room and clarity, set the channel TRIM and LEVEL controls first for a good signal without clipping, then set the master for the overall volume desired.

MON Master Control
The overall level of the monitor mix is adjusted with the MON master control.
Note: As with the MAIN master, set the MON master to deliver the desired volume after setting the channel sends.

MAIN EFFECTS Return Control
The MAIN EFX control regulates the amount of signal going from the output of the internal Digital Effects Processor to the MAIN mixing bus where it is mixed with the dry signals directly. It controls the intensity of the effects on the left and right MAIN output signals.

MON EFFECTS Return Control
The MON EFX control regulates the amount of signal going from the output of the internal Digital Effects Processor to the MON mixing bus where it is mixed with the dry signals directly from the channel MON send controls. It controls the intensity of the overall effect for the MON Out signal.

Pre-EQ OUT, Post-EQ OUT
These jacks offer a variety of patching and routing options. They are positioned in the signal path before and after the M810/M1610 main graphic equalizers.
Note: The Pre-EQ Out and the Post-EQ-Out signals include the effects return signal.
These bus signals are at line level, not speaker level (use the SPEAKER outputs on the rear panel to drive speakers). Using signals from these jacks has no effect on the operation of the M810/M1610 built-in power amplifier. This makes it possible to feed an external power amplifier, or even multiple inter-connected power amps, while the internal power amplifier is functioning.
Note: It is not necessary to have speakers connected if you’d like to use the unit strictly as a mixer. If a mono signal is required, possibly to feed a mono-house PA or another amp/speaker system, use the L/Mono Pre-EQ jack. Mono operation of this jack is switched to left channel only as soon as a jack is inserted in the R Pre-EQ jack. The Post-EQ OUT jacks are not linked in this manner. They follow the operation of the Main/Mon switch described below.

Power AMP IN Jacks
The Power AMP A IN and Power AMP B IN jacks are direct inputs to the built-in power ampli-fiers. They are referred to as A and B rather than left and right simply because it is possible to power both main PA speakers with one amplifier channel and monitors with the other. This can be accomplished by selecting the Main/Mon position on the selector switch located between the graphic equalizers. In the Left/Right position, Power AMP A receives the left signal while Power AMP B receives the right signal. In the Main/Mon position, Power AMP A receives a mono sum of left and right signals while Power AMP B receives the monitor signal. An alternative use for the Power AMP A IN and Power AMP B IN jacks would be as patching inputs. Since they’re switching jacks if you plug into one (or both) the internal signal flow will be interrupted. This interrupts the signal from the M810/M1610 mixer to the built-in power amplifiers allowing you to insert signal control devices such as an élite processor, an additional equalizer, or a compressor/limiter into the main stereo signal path. Connect cables from the L and R Post-EQ OUT (or Pre-EQ OUT) to the device’s input jacks and then from the device’s output jacks to the M810/M1610 Power AMP A IN and Power AMP B IN jacks.
You can connect another mixer to the M810/M1610 power amplifier through the Power AMP A IN and Power AMP B IN jacks. This slaves the amplifier to the other mixer’s sig-nals; it no longer receives the built-in mixer’s signals which means that you could use the built-in mixer to do a totally separate mixing job. For example, you could patch the M810/M1610 L and R Pre-EQ OUT (or Post-EQ OUT) to inputs on another mixer connected to other amplifiers driving a PA speaker system while using the M810/M1610’s A and B amps to power control room speakers.

Rec OUT Jacks
These phono connectors send the L and R pre-EQ, pre-EFFECTS (not affected by the MAIN EQ) main mix signals. The Rec OUT control, located just below the MAIN control, adjusts the signal level for these jacks. Using phono patch cords, connect directly to the Auxiliary (line-level) inputs on a tape deck or other recording device.

MON Out Jack The monitor bus output signal from the Mon OUT jack is line level and would normally be patched to the input of a mono power amplifier (or a single channel of a stereo amp) driving stage monitor speakers. Keep in mind that in the Left/Right position of the Amp Assign switch there is no internal equalization for the monitor mix (you might want to patch a graphic equalizer between the Mon OUT jack and the input of your monitor power amplifier, this can help regulate the feed). As mentioned under #5. Pre-EQ OUT, Post-EQ OUT section (above), the monitor mix signal can also be patched to one channel of the internal amplifier using the Amp Assign switch.

EFX Out / Footswitch Jack
Using this jack you can connect a standard on/off footswitch to control the activation of the internal Digital Effects Processor or it can be used as an effects send jack for use with an external effects processor.
Note: Both devices would be sent a signal, so you could connect the external unit’s left and right outputs to the L and R inputs on channel 7/8 (channel 9/10 or any of the other channels). Use the LEVEL of that channel to adjust the amount of wet signal added to the main mix and the MON control to adjust the amount of wet signal added to the monitor mix. Make sure that its EFX control on the channels are turned off. An alternative could be to use the EFX Out / Footswitch jack to deliver line level signal to the input of an auxiliary amplifier or even a record-ing device. Here, the channel EFX controls would act as secondary level controls.

Power LED and Switch
The Power LED lets you know that the M810/M1610 is plugged in, turned on and all systems are normal. The Clip/Protect LEDs normally indicate clipping in the amplifiers. They will remain illuminated and the power LED will turn off in the unlikely event that the amplifiers overheat or if DC voltage is detected on the output. The AC power on/off switch is on the rear panel of the M810/M1610.

Phantom Power
The Phantom Power LED indicates that 48 volts of DC phantom power is present on the XLR microphone inputs for powering condenser microphones. Regular dynamic mics may also be used while the Phantom Power is on. Connecting a microphone of either type with phantom power on and the channel LEVEL up will create a large transient, result-ing in a loud, potentially damaging pop. When setting up, either turn off the AC power, the phantom power, or set all channel levels to zero. The Phantom Power push-button is located on the rear panel between the speaker output jacks.

Tape/CD Input
Left and Right RCA inputs are provided to connect a CD player, cassette player or other stereo source to the mixer. These inputs are routed directly to the main bus, the Tape/CD control adjusts the amount of signal.

Mute 1-8 Switch The M810/M1610 includes a feature that enables users to instantly mute channels 1-8. Depressing the Mute 1-8 switch will mute channels 1-8 signals being sent to the Left, Right, Mon and EFX busses (the signals from these channels will still be sent to the record bus and will not be muted. Channel 9/10 will remain active, leaving this channel open for allowing a microphone or CD player, cassette player or other stereo source to be heard over the Left, Right, Mon and EFX busses. This feature lets you mute the mics and instruments on stage and still allows you to make announcements or play music during breaks. When the band returns to perform, simply deactivate.
Note: The Tape/CD input in the master section also remains active. While muted, the Mute LED flashes at a slow rate (long on/short off) and the clip LEDs of all the muted channels alternate long off/short on.

Amp Assign Switch
The MAIN controls determine the level of the signal routed through the Amp Assign switch:

1. In the Left/Right position, the Amp Assign switch directs the left and right MAIN master signals through Equalizer A and Equalizer B. The signal goes to the left and right inputs of the built-in power amplifier (Amp A and Amp B) and to the left and right post-EQ OUT jacks.
2. In the Main/Mon position, the Amp Assign switch sums the left and right MAIN signals into a single, mono signal while directing it to the input of Equalizer A, the output of which goes to both the Amp A power amp channel and to the Post-EQ MAIN OUT jack. Additionally, the signal from the MON master’s output is routed through Equalizer B and then to both the Amp B power amp channel and to the MON Out jack.

Digital Effects Processor

Select and MODIFY EFX Controls
Use the EFX Selection control to choose from the sixteen 24-bit digital reverbs, delays and other effects. This control ro-tates continuously, which lets you rotate clockwise or coun-ter-clockwise to select the desired effect. For convenience, a table of the effects and their variables appear later in this manual and on the front panel of the M810/M1610.
Parameters for each of the effects can be changed using the MODIFY control which is located next to the Selection control. For example, if a Hall reverb has been selected, the MODIFY control will let you adjust the decay parameter. Choosing the Chorus effect allows the chorus rate to be adjusted.
Note: The signal sent from the internal Digital Effects Processor to the MON mix is independent from the MON send controls on the channel strips. When a channel’s EFX control routes a sig-nal to the internal Effects processor and the MON level control (for that channel) is turned off, the channel’s wet effects will still be audiable in the monitor bus (if the EFX to MONitor return level is turned up).

Effects CLIP LED

Situated to the right of the MODIFY EFX control, the CLIP LED indicates that the digi-tal processor is receiving an input signal that’s too strong, resulting in distortion. For optimum performance, the CLIP LED should never flash. If there is clipping activity, turn down the channel EFX controls appropriately.

**Built in 9-Band Graphic Equalizer & Shelving EQs

**

1. General
   Each EQ consists of a set of +/-15dB range type controls. In the M810/M1610 there are nine sliders for each channel, each one operating over a 2/3-octave portion of the mid-range band of sound frequencies, as well as rotary shelving Bass and Treble controls.
   Note: Equalizers have an effect on the gain of the main system as well as its frequency response. Once adjusted, you may need to adjust the MAIN master level if the clip LEDs become too active.

2. Main Functions for the Graphic EQ and Shelving Equalizers

3. To adjust the system to help reduce feedback, a normal technique is to turn the main system up to the point of feedback and then adjust the EQ sliders individually to deter-mine which frequency band will reduce the potential of feedback. When the specific frequency band is isolated, set it to about -3 to -5 dB. Usually only 2 or 3 bands can be reduced before the feedback reduction process begins to affect the sound quality.

4. To adjust for deficiencies in the speaker system’s high frequency and bass response, the M810/M1610 also has a 2-band rotary shelving equalizer. These work in conjunction with the 9-band graphic. Yorkville engineers have developed this technique to provide you with greater tone shaping capability. This allows the graphic equalizer bands frequencies to be spaced at closer intervals, which mean better selectivity for feedback reduction and sound shaping. You may want to turn up the Lo and Hi controls to give the system a more HiFi sound when you’re play-ing at lower volumes. At higher volume levels, you may need to turn these con-trols down, this will help maximize the volume and tighten up the sound.

5. The third use of the graphic equalizer is to adjust the sound character for artistic reasons. The frequencies are adjusted until the sound feels best to the musicians.

M810/M1610 Rear Panel

Power Amplifiers
Each of the M810/M1610 dual power amplifiers has two ¼-inch jacks and 1 Speakon jack for speaker connections. The power amplifiers are designed to provide full power into a 4-ohm load. Connecting two 4-ohm speakers (2-ohm load) to either AMP A or AMP B will not harm the M810/M1610 but the maximum power output may be reduced.
WARNING: Do not obstruct the flow of air around the vents on the rear of the M810/M1610, this may cause the power amplifier to overheat. The amplifier will start to reduce its power out-put in order to keep running. In extreme cases it may be forced to shut down. If the clip LEDs are illuminated continuously and the Power LED is off, this will indicate shutdown. After the M810/M1610 cools down, operation will be restored automatically This condition should not occur if adequate ventilation is provided at the back of the unit.

Power Switch and Breaker
The Power switch and circuit breaker are located on the rear panel. If the circuit breaker trips during use, wait a few minutes (to cool), then push in to reset. The circuit breaker can trip if the amplifier is too heavily loaded with long periods of continuous tones
(such as feedback). If the circuit breaker trips immediately after being reset, take the unit to your Yorkville dealer for service.

General Operating Instructions

1. Connect the AC power cord to a 120 Volt AC grounded power outlet (220 to 240 Volts in export units).

2. Turn the MAIN and MON master controls to 0 initially, then switch on the Power.

3.  You can connect low-impedance microphones to the 3-pin XLR type MIC inputs.

4. Connect high-impedance mics or mono line-level signal sources (mixer line outputs, keyboards etc.), to the ¼-inch balanced LINE IN jacks on channels 1-4, 7/8 and 9/10. Connecting more than one signal source to both XLR and ¼-inch inputs is not recom-mended; this includes stereo sources (if you try to connect a stereo source to a mono channel using a Y-adapter, you may get distortion). The ¼-inch channels 5 and 6 are optimized for musical instruments and are not balanced.

5. Connect stereo sources (CD players, tape decks, stereo keyboards etc.) to channels 7/8 or 9/10 via the stereo ¼-inch balanced LINE IN type inputs. Once again, connect only one signal source per channel, and use shielded patch cords for all pre-amp connec-tions. If a monitor send or EFX send is not required use the Tape/CD input for your stereo source.

6. Use 18-gauge (or heavier) speaker cables, using shielded patch cords to connect speak- ers will waste power by heating up. Connect one or two 8-ohm PA speakers to the SPEAKER outputs on the rear panel.
   Note: To deliver maximum power to a pair of 4-ohm PA speakers, connect only one speaker to each amplifier.

   • 6b. If you are using a separate power amplifier for the stage monitor speakers, connect the main speakers (as in #6, above) and run a shielded patch cord from the Pre-EQ or Post-EQ Out jack to the input of the monitor power amp. If you are using a separate graphic equalizer for the monitors run a shielded patch cord from the Pre-EQ or Post-EQ Out OUT jack to the input of the EQ. Then, another one from the EQ’s output to the input of the monitor power amp.

7. Position your main PA speakers at the front of the stage, pointing directly at the audi-ence. Position your monitor speakers on the stage floor; preferably to one side of the mic stands, pointing up at the performer. Try to use cardioid or uni-directional mics to help reduce the threat of feedback through the monitors (avoid having the back of the mic pointing directly at the speakers).

8. During a sound check and with the band playing, make the following control adjustments:

9. On mono channels, you need to set the TRIM appropriately. To set the TRIM, first turn the channel LEVEL control down, with a normal signal (present at the input) adjust the TRIM control until the green LED flashes only during the peaks in sig-nal. Now you can use the LEVEL control to set the channel volume level.

10. Set the channel Lo, Mid, and Hi EQ controls at center. Set the channel LEVEL, MON, and EFX controls to seven. The Graphic EQ sliders and rotary shelving controls should be set at the center position at this point as well.

11. Turn the MAIN and MON Master controls up to give the desired volume, the MAIN EFX return to around 7. Effects in the monitors tend to increase the possibility of feedback so if the band insists, set the MON EFX return to 5.

12. Adjust the channel MON control/s to give each performer the desired volume levels. Use the MON master control to adjust the overall monitor level.

13. Use the channel LEVEL control/s to balance each channel’s volume level through the main PA speakers.

14. Turn up the EFX controls on those channels requiring the selected Digital Effect. Typically, the lead and harmony vocal channels would be good candidates for effects. Reverb can be used on other channels or on recorded music, but should be used sparingly.

15. Feedback during a performance is usually caused by one of the stage monitors. The main PA is less likely to feedback because the mics are usually a good distance from the main PA speakers. Therefore, if you’re using monitors, and feedback occurs, try the following procedures:

16. Turn the MON Master down until the feedback stops.

17. If a graphic equalizer is patched between the MON output and your monitor power amp, adjust the EQ sliders individually to determine which frequency band will reduce the potential of feedback.

18. Now turn the MON Master back up. If the feedback returns, reset the sliders to their original positions and retry using different sliders.

19. In the rare case of main system feedback, follow the above type of procedure, but use the MAIN Master and the built in Graphic EQ.

Input Wiring tips:

1. For all input connectivity use shielded wire only. Cables with a foil shield or a high- density braid are best.
2. When changing input connections, turn down the level controls on the mixer to eliminate pops and thumps out of the loudspeakers as the cable contacts the mixer.
3. Keep input connection cables as short as possible to minimize noise and hum.

M810-2 SPECIFICATIONS

• Number of Channels 10

• Mono Channel EQ Low, Mid, High
  Stereo Channel EQ Low, Mid, High
  Channel Effects All Channels

• Monitors Effects Yes Balance Controls Ch. 7 – 10

• Pan Controls Ch. 1 – 6
  Channel Overload Protection Ch. 1 – 6

• Inputs – XLR (bal) 8

• Inputs – 1/4-inch 10 Inputs – RCA (unbal) 1 Pair

• Mute Switches Global 1 – 8 Activity / Solo LED Trim Set Ch. 1 – 6

• Clip /Mute LED All Channels
  Phantom Power 48V + LED Indicator
  Internal Effects 24 bit Stereo, 16 Effects with Parameter Pot Auxiliary Sends Effect – Monitor

• Effects Send Yes Effects Return Internal

• Effects Return to Main Yes Effects Return to Monitor Yes Reverb / Effects Footswitch Yes

• Record Outputs Stereo RCA Pair

• Max Gain to Line Out -Mic Input (dB) 84

• Max Gain to Line Out -Line Input (dB) 82

• Master EQ -1 (type /Channels /Range – dB) Graphic 9 band (160hz-6.3khz) +2 band Shelving

• Monitor EQ -1 (type /Channels /Range – dB) Graphic 9 band (160hz-6.3khz) +2 band Shelving

• Main Outputs ( Line Level) 2 x 1/4inch TRS

• Main Amp Inputs (Line Level) 2 x 1/4inch TRS

• Monitor Outputs (Line Level) 1 x 1/4inch TRS

• Outputs – Amp A – 1/4-inch Jacks 2

• Outputs – Amp A – Speakon 4-pin 1

• Outputs – Amp B – 1/4-inch Jacks 2

• Outputs – Amp B – Speakon 4-pin 1

• Mixer – Signal to Noise Ratio (dB) 105

• Mixer – Frequency Response (Tone and EQ Flat,+/-2dB) 20 – 20,000

• Mixer – Input Referred Noise to line out, @ 150 ohms (dBv) -119

• Mixer THD (Main out w/ -10dB input) 0.01%

• Amp A – Power Output @ 8 ohms (0%1″THD, 1kHz) 250

• Amp A – Power Output @ 4 ohms 400

• Amp A – Power Output -other 400 @ 2 ohms

• Amp B – Power Output -other 400 @ 2 ohms

• Amp B – Power Output @ 4 ohms 400

• Amp B – Power Output @ 8 ohms (0%1″THD, 1kHz) 250

• THD – 1kHz (dB) 0.1%

• Hum and Noise (un / Aweight -dB) -101 / -107

• THD – 20Hz-20kHz (dB) 0.5%

• Typical crosstalk -1 kHz (dB) better than -60db

• Input Impedance – Bal/Unbal (ohms) 20k / 10k ohms

• Input Sesitivity (Vrms Sine) 1.4

• CMRR @ 60Hz (min/typ) -37db / -60db

• Max Votage Gain (dB) 29

• Power Consumption (typ/max) 770VA / 500VA

• Protection Thermal, Short Circuit, Impedance Overload

• Cooling 2 x 80mm Fans

• Transformer Type Toroidial

• Finish Grey and Black Powder Coat

• Chassis Construction Steel and Aluminum

• Rackmount Yes (Kit Available)

• Other Features Tiltback or Upright Wedge Angles

• Dimensions (DWH, inches) 11.1 x 18.6 x 11

• Dimensions (DWH, cm) 28 x 47 x 28

• Weight (lbs/kg) 28.2 / 12.8

Two & Ten Year Warranty

Unlimited Warranty
Yorkville’s two and ten-year unlimited warranty on this product is transferable and does not require registration with Yorkville Sound or your dealer. If this product should fail for any reason within two years of the original purchase date (ten years for the wooden enclosure), simply return it to your Yorkville dealer with original proof of purchase and it will be repaired free of charge. This includes all Yorkville products, except for the YSM Series studio monitors, Coliseum Mini Series and TX Series Loudspeakers.
Freight charges, consequential damages, weather damage, damage as a result of improper installation, damages due to exposure to extreme humidity, accident or natural disaster are excluded under the terms of this warranty. Warranty does not cover consumables such as vacuum tubes or par bulbs. See your Yorkville dealer for more details. Warranty valid only in Canada and the United States.

Canada
Voice: 905-837-8481 Fax: 905-837-8746

U.S.A.
Voice: 716-297-2920 Fax: 716-297-3689

Yorkville Sound 550 Granite Court Pickering, Ontario L1W-3Y8 CANADA

References

• Aktuelle Nachrichten aus Würzburg, Schweinfurt, Franken, Bayern und der Welt - Main-Post

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