Guitar Center A40 40 Watt Acoustic Instrument Amp User Manual

USER’S MANUAL
40 WATT ACOUSTIC INSTRUMENT AMP

A40 40 Watt Acoustic Instrument Amp

IMPORTANT SAFETY INSTRUCTIONS

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 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.

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 the 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.

15. Refer all servicing to a qualified service professional. Servicing is required when the apparatus does not operate normally or has been damaged in any way, including damage to the power cord or plug, damage due to liquids spilled or objects dropped inside the unit, dropping the unit, or anything else that interrupts normal use of the unit.

16. WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.

17. When the MAINS plug, or an appliance coupler is used as the disconnect device, the disconnect device shall remain readily operable.

18. Protective Ground Terminal: The apparatus shall be connected to an AC main socket with a protective earth ground connection

DANGER

Exposure to extremely high noise levels may cause permanent hearing loss. Individuals vary considerably to noise-induced hearing loss but most will lose some hearing if exposed to intense noise for a sufficient period of time.
The U.S. Government’s Occupational Safety and Health Administration (OSHA) has specified the following permissible noise level exposures:
DURATION PER DAY (HOURS) 8 6 4 3 2 1
SOUND LEVEL (dB) 90 93 95 97 100 103
According to OSHA, any exposure in the above permissible limits could result in some hearing loss. Ear plugs or protectors in the ear canal or over the ears must be worn when operating this amplification system in order to prevent a permanent hearing loss. If exposure in excess of the limits as put forth above, to insure against potentially harmful exposure to high sound pressure levels, it is recommended that all persons exposed to equipment capable of inducing high sound pressure levels, such as this amplification system, be protected by hearing protectors while this unit is in operation.
CAUTION
RISQUE DE CHOC ELECTRIQUE, NE PAS OUVRIR.
CAUTION
RISK OF ELECTRIC SHOCK DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE CHASSIS. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
THIS SYMBOL IS INTENDED TO ALERT THE USER TO THE PRESENCE OF NON- INSULATED “DANGEROUS VOLTAGE” WITHIN THE PRODUCT’S ENCLOSURE THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK TO PERSONS
THIS SYMBOL IS INTENDED TO ALERT THE USER TO THE PRESENCE OF IMPORTANT OPERATING AND MAINTENANCE (SERVICING) INSTRUCTIONS IN THE LITERATURE ACCOMPANYING THE UNIT.
****APPARATUS SHALL NOT BE EXPOSED TO DRIPPING OR SPLASHING AND THAT NO OBJECTS FILLED WITH LIQUIDS, SUCH AS VASES, SHALL BE PLACED ON THE APPARATUS.

WHAT SETS THE A40 APART

Your new Acoustic A40 amplifier is designed to sound great with any acoustic instrument or vocal.
We put a lot of thought and effort into selecting exactly the right components and designing a product that will be easy to adjust so you can quickly find the voice of your instrument and project it beyond your personal performance space.
Here are a few of the features that we put into the A40 to make you sound your best –

• 40-watt output: enough power for stage or studio
• Dual combo XLR-114- inputs for use with instruments or vocals, each with separate volume
• 8- coaxial design studio monitor-style speaker for extended frequency response
• Ported cabinet design for extended bass response
• 3-Band EQ with sweepable mid-range for more tonal flexibility
• Full-function digital effects with editable parameters and LCD readout
• Auxiliary Bluetooth connectivity: play backing tracks directly from your mobile device
• DSP-based AUTOMATIC feedback elimination
• Effects Loop
• Full-feature direct output with ground lift. prelpost EQ and level — Connect DI output to powered speakers to send your signal to your PA

No matter what your style of playing or choice of acoustic instrument. you will find that your new amp will capture and project the very best of your musical voice.

SPECIFICATIONS

Power: 40W RMS Equalizer:

• Low +I- 15dB @ 80 Hz

• Mid +1- 15dB; 500Hz to 1.2kHz [sweepable]

• High +1- 15dB @ 10kHz
  Channels: 1 Inputs: 2 Digital Signal Processor [DSP]:

• 20 Preset programs

• 20 User programs

• Reverb, Delay, Chorus, Et Flange

• Auto-Feedback Elimination Filter [12 filters, DSP based] Speaker: 8″ Coaxial Studio Monitor style Dimensions: 18.3″ L X 17.3″ W x 16.5″ D Weight: 28.7 lbs.

TAKING CARE OF YOUR NEW AMPLIFIER

LOCATION

• To avoid deformation. discoloration. or more serious damage. do not expose the unit to direct sunlight. high temperature sources. or excessive humidity.

POWER SUPPLY

• Turn the power switch off when the A40 is not in use.

• The AC cable should be unplugged from the AC outlet if the A90 will not be used for an extended period of time.

• Avoid plugging the AC cable into an AC outlet that is also powering high consumption appliances such as electric heaters or televisions.
  NOTE: Also avoid using multi-plug adapters since these can reduce sound quality. cause operation errors. and result in possible damage.

• To avoid damage. turn off the A40 power switch and all related devices prior to connecting or disconnecting cables. MOLE HAD ifinosrou

• Never apply excessive force to any parts.

• Unplug cables by gripping plugs firmly. Do not pull on cables.

• Physical shocks caused by dropping or bumping can result in serious damage.

CLEANING

• Clean with a dry. soft cloth.
• A slightly damp cloth may be used to remove stubborn grime and dirt.
• Never use cleaners such as alcohol or thinner.

ELECTRICAL IIHERFEREACE

• The A40 contains electronic circuitry that may cause interference if placed too close to radio or television receivers. If this occurs. move the A90 further away from the affected equipment.

SERVICE AND MODIFICATION

• There are no user serviceable parts in the A40.
• Do not attempt to open the A40 or make any change to circuits or parts. This will void the warranty.

FRONT PANEL

1. LAPUTS
   – combination 1/4′ [2-conductor instrument cable] or XLR [3 or 4-conductor microphone]

2. VOLUME
   cofirms – these adjust the overall loudness of the corresponding input.
   If your acoustic instrument has a preamp. you should set the Volume control on your instrument to about half volume. You can then adjust the volume to your normal playing level and still have room to increase or decrease your volume as needed from the instrument.

3. PRUE POWER (‘OW – this switch enables a +48 volt DC send on PIN 1 of an XLR cable to power condenser microphones.

4. . EQUALIZATION
   A LOW – set to boost [15 dB] or cut [-15 dB] frequencies at 80 Hz. Controls the lowest fundamental frequencies to enhance the warmth and deep. full tones of your acoustic instrument.
   B. FEHR – set to boost [15 dB] or cut [-15 dB] adjustable from 500 Hz to 1.2 kHz. Allows you to control the definition and voice of your acoustic instrument.
   1. FREQUENCY – this adjusts the center frequency for the MIDRANGE EQ control above: you can sweep between 500Hz and 1.2kHz. Moving the midrange frequency and either cutting or boosting this frequency will give you maximum control over the body of your tone. It also allows you to control the definition and voice of your acoustic instrument or vocals.
   C. HIGH – set to boost [15 dB] or cut [-15 dB] frequencies at 10 kHz. Increasing this will enhance the clarity and brightness of your acoustic instrument.

5. Digital effects
   — UPEDD1 soft buttons scroll between programs. select effect types or parameter values
   – Press UPIDOWN buttons together to activate the tuner. Press any button to exit.
   – SELECT button scrolls through individual effects within a program
   – ON OFF button turns an individual effect on or off within a program
   – PARAM [parameter] button pages through the parameters of an effect
   – UPEDD1 buttons change the parameter value
   – SAVE button saves a program to one of 20 user-definable locations
   – UP/MINN buttons select memory slots [U01 through U20] – Press SAVE a 2nd time to move to title [edit as you like] – Press SAVE to save your user program
   – Press SELECT or ONIOFF to exit out to the preset screen In addition to the amazing digital effects. the A40 utilizes a DSP-based AUTOMATIC feedback elimination [AFB] filter. This digital processor scans your input for any unwanted feedback. and will eliminate it. The A40.s 12 digital filters remove virtually any feedback from your signal path! The AFB filter settings can be adjusted in any DSP program and will be applied to all program settings.

6. RUX IR – this 3-conductor 1/8 Aux input jack will allow you to plug in a CD. MP3 player or any other source so you can play along. To control the volume of this input. adjust the output volume of the device.

7. BLUETOOTH MOTOR – this indicates the BLUETOOTH switch [rear panel] has been engaged and is active: simply tether your mobile or aux device using the passcode [1967] to allow audio playback.

8. HEROPHILE – this 118- 3-conductor jack is for plugging in headphones. When used. it will disconnect the internal speaker.

9. POWER – this indicator light will illuminate when the rear panel power switch is depressed.
   DSP PROGRAM PRESETS

   #| TITLE| EFFECTS KIDDED
   1| Dry No EFX| None
   2| Short Room| Short reverb
   3| Small Room| Small room reverb
   4| Medium Room| Mid-size room reverb with early reflections
   5| Large Room| Large room reverb with early reflections
   6| Small Hall| Small concert hall reverb
   7| Medium Hall| Mid-size concert hall reverb
   8| Large Hall| Large concert hall reverb
   9| Church| Giant reverb with reflection
   10| Slow Chorus| Slow. rich. sweeping chorus effect
   11| Lush Chorus| Thick chorus effect with more regeneration
   12| Flange| Mid-depth flange effect
   13| Phaser| Shallow. medium rate phaser effect
   14| Slap Back| Short single-repeat delay
   15| Med Delay| 1/2 sec. delay
   16| Long Delay| 1 sec. delay
   17| Chorus Verb| Slow Chorus combined with Large Hall Reverb
   18| Lush Verb| Lush Chorus combined with Large Hall Reverb
   19| Crazy Multi| Wide Chorus. Church Reverb. and 1.2 sec. delay
   20| Vocal Multi| Vocal Plate Reverb plus 112 sec. delay

EDITABLE PARAMETERS

Chorus. Flanger. Phaser:| Depth. Rate. Level. Pre-Delay
| Time. Feedback [Effect Level]
Reverb:| Type. Pre-Delay. Time. Level
Reverb Types:| Spring Rev. Short Room. Room.
| Small Hall. Large Hall. Church.
| Vocal Plate
Delay:| Type. Delay Time. Level
AFB Detect Mode [Global]:| Slow. Medl. Med2. Fast

REAR PANEL

1. POWER – this rocker switch will illuminate with a soft amber color when the amp is turned on and ready to play. A. AC [Ai[ ID – this plug accepts a standard CLASS 1 IEC grounded cable [included] to provide AC power to the amplifier. B. ORM SELECTOR – used to select the input voltage level to 1101115V or 2201230V. Voltage standards vary by country. This switch is preset at the factory. Setting the power supply voltage switch to the incorrect input voltage could damage the power supply and possibly other parts of your equipment.
2. DIRECT OUTPUT R. PRE/POST EU SWITCH – this switch determines if your direct output signal will be effected by the front panel equalization settings. In the PRE setting. the direct signal is not effected by the front panel settings: in POST setting. the direct signal is effected by the EO settings. B. DIRECT OUTPUT [EKE – this adjusts the overall level of the direct output. C. DIRECT ORE – connect a standard XLR balanced cable from this jack to provide a line-level signal to your PA system. powered speaker. or other powered output device. D. BRODIE LIFT – this switch disconnects pin 1 on the XLR jack. which is connected to the shield in the cable and acts as the ground point of the circuit. reducing ground-related noise.
3. EFFECTS LOOP – these 1/4- unbalanced send and returns allow you to run external effects before the preamp. resulting in clearer effects signal. and cleaner levels [line level vs. instrument level]. Connect the Send to your effect devices input. and the output from your device to the return.
4. BLUET00TH – this switch engages the bluetooth connectivity for use with your mobile devices: simply tether your mobile or aux device using the passcode [1967] to allow audio playback.

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Documents / Resources

| Guitar Center A40 40 Watt Acoustic Instrument Amp [pdf] User Manual
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