Acoustic A20 Manuel de l'utilisateur - Page 6
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INPUT 1
VOLUME 1
INPUT 2
VOLUME 2
1
2
FRONT PANEL
PROPRIETARY CREATIVE SERVICES
JOB#: 10021
1. INPUTS
– combination ¼" (2 conductor instrument cable) or XLR (3-4 conductor microphone)
JOB DESCRIPTION: Acoustic A20 Amp Front Panel Silkscreen
SIZE BUILT: 100%
DATE BUILT: 02/17/14
2. VOLUME CONTROLS
COLORS USED: 2
should set the Volume control on your instrument at about half volume. You can then adjust the amplifier volume to your normal
PMS 4975C
CHASSIS COLOR
PANEL SILKSCREEN
playing level and still have room to increase or decrease your volume as needed from the instrument.
3. EQUALIZATION
A. LOW FREQUENCY
- set to boost (15 dB) or cut (-15 dB) frequencies at 100Hz. Controls the lowest fundamental frequencies to enhance
the warmth and deep, full tones of your acoustic instrument or vocals.
B. MIDRANGE FREQUENCY
your acoustic instrument or vocals.
c. HIGH FREQUENCY
- set to boost (15 dB) or cut (-15 dB) frequencies at 7kHz. Increasing this will enhance the clarity and brightness of
your acoustic instrument or vocals.
4. FEEDBACK ELIMINATION
a. FEEDBACK ELIMINATION LEVEL
experiencing any feedback issues.
b. FEEDBACK ELIMINATION FREQUENCY
To control Feedback, do the following:
1. Set the Level control to "12 o'clock" setting or higher
2. Turn the Frequency knob, moving from left-to-right, to search for the frequency at which the feedback is to be suppressed.
A. If in the lower register, start at "0" position
B. Sweep to the right if the frequency is in the higher register
C. When the feedback is eliminated, reduce the Level control until the feedback returns, then adjust slightly
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
EQUALIZATION
LOW
MID
3
- these adjust the overall loudness of the corresponding input. If your acoustic instrument has a preamp, you
(RAL 1015)
- set to boost (15 dB) or cut (-15 dB) frequencies at 800Hz. Allows you to control the definition and voice of
– this adjusts the amount of feedback filtering. Be sure to set this control to "off" if you are not
– this adjusts the frequency of the feedback filtering.
upward until it is gone
FEEDBACK
ELIMINATION
HIGH
LEVEL
FREQUENCY
OFF
CHORUS
ON/OFF
4
U
AUX IN
CHORUS
REVERB
POWER
REVERB
ON/OFF
5
6
7
8
9