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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

5.

 

 

CHORUS

 

a. Chorus On 

/

 Off switch

 

– this creates a shimmering, musical tonal effect. 

b. Chorus Rate control

 

-  this will speed up the rate of the Chorus effect.

6.

 

 

REVERB

 

a. Reverb On 

/

Off switch 

– this simulates the natural ambience of reflective soundwaves.  

b. Reverb Level control 

– 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 will disconnect the internal speaker.

9.

 

 

POWER

 – this rocker switch will illuminate with a soft amber color when the amp is turned on and ready to play.

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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