Acoustic A20 Manuel de l'utilisateur - Page 8
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Model: A20
20 Watt RMS
No User Serviceable Parts
Acoustic Amplification
P.O. Box 5111
Thousand Oaks, CA 91359-5111
www.acousticamplification.com
DESIGNED IN THE USA
Made in CHINA
REAR PANEL
PROPRIETARY CREATIVE SERVICES
JOB#: 10021
JOB DESCRIPTION: Acoustic A20 Amp Rear Panel Silkscreen
SIZE BUILT: 100%
DATE BUILT: 02/17/14
COLORS USED: 2
1. POWEr
A. AC LINE IN
– this plug accept a standard CLASS 1 IEC grounded cable (included) to provide AC power to the amplifier.
B. VOLTAGE SELECTOR
– used to select the input voltage level to 110/115V or 220/230V. 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
a. PRE/POST EQ 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 EQ settings.
b. DIRECT OUTPUT LEVEL
– this adjusts the overall level of the direct output.
c. DIRECT OUTPUT
– 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. GROUND 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 ¼" unbalanced send and returns allow you to run external effects between the preamp and the
power amp, 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.
EQ
110~120V 60Hz 80W
220~240V 50Hz 80W
POST
115V
WARNING:
Select correct
voltage before
connecting to
power source
230V
T1AL 250V
1
2
DIRECT
DIRECT
OUTPUT LEVEL
OUTPUT
GROUND
PRE
GND
LIFT
EFFECTS
LOOP
SEND
RETURN
3