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w w w . A c o u s t i c A m p l i f i c a t i o n . c o m

USER’S MANUAL

20 WATT ACOUSTIC INSTRUMENT AMP

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 A20 is not in use.

• The AC cable should be unplugged from the AC outlet if the A20 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.

•  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 A20 power switch and all related devices prior to connecting or disconnecting cables.

HANDLING AND TRANSPORT

 

• 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 INTERFERENCE

•  The A20 contains electronic circuitry that may cause interference if placed too close to radio or television receivers. If this occurs, 

move the A20 further away from the affected equipment.

SERVICE AND MODIFICATION

• There are no user serviceable parts in the A20.

• Do not attempt to open the A20 or make any change to circuits or parts. This will void the warranty.

SPECIFICATIONS

 

 

Power: 20W RMS 

Equalizer: 

  Low ±15dB@100Hz 

  Med ±15dB@800Hz 

  High ±15dB@7kHz

Channels: 1

Inputs: 2

Digital Reverb

Digital Chorus

Feedback Elimination Filter

Speaker: 8” Co-ax Studio Monitor Style 

Dimensions: 14.4”H x 13.0”W x 15.8”D 

Weight: 21.5 lbs.

Summary of Contents for A20

Page 1: ...w w w A c o u s t i c A m p l i f i c a t i o n c o m USER SMANUAL 20 WATT ACOUSTIC INSTRUMENT AMP ...

Page 2: ...t for solo performance rehearsal and more Two inputs each with combo XLR 1 4 jacks for use with instruments or vocal microphones 1 x 8 co ax speaker featuring a polypropylene cone with a rubber surround for extended frequency response combined with a tweeter for chime like high end clarity Shelf ported cabinet design for extended bass response 3 Band EQ for great tonal control Digital chorus with ...

Page 3: ...g or disconnecting cables HANDLING AND TRANSPORT 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 INTERFERENCE...

Page 4: ...ance the clarity and brightness of your acoustic instrument or vocals 4 FEEDBACK ELIMINATION a FEEDBACKELIMINATIONLEVEL this adjusts the amount of feedback filtering Be sure to set this control to off if you are not experiencing any feedback issues b FEEDBACKELIMINATIONFREQUENCY this adjusts the frequency of the feedback filtering To control Feedback do the following 1 Set the Level control to 12 ...

Page 5: ...verbLevelcontrol increasing the level control will intensify the amount of reverb present in your signal 7 AUX IN this 1 8 3 conductor Aux input jack will allow you to plug in a CD MP3 player or any other stereo source so you can play along To control the volume of this input adjust the output volume of the device 8 HEADPHONE this 1 8 3 conductor jack is for plugging in headphones When used it wil...

Page 6: ...signal to your PA system powered speaker or other powered output device d GROUNDLIFT 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 EFFECTSLOOP these unbalanced send and returns allow you to run external effects between the preamp and the power amp resulting in clearer effects s...

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