First Act MA120 - Manual (Page 2)

1. INPUT JACK
Connect instrument cable here (1/4” jack).
2. MASTER
Controls the total output level of amplifier.
CHANNEL 1 – CLEAN CHANNEL
3. LEVEL
Controls the output level.
4. TREBLE
Adjusts high frequency output.
5. BASS
Adjusts low frequency output.
6. CHANNEL SWITCH
Switch off/out for Channel 1–indicated
by green LED.
Switch on/in for Channel 2–indicated
by red LED.
7. LED
Indicates amplifier power on/off.
CHANNEL 2 – DISTORTION CHANNEL
8. LEVEL
Controls the output level.
9. GAIN
Controls the input level. Increasing gain
adds distortion, or overdriven rock tone;
decreasing gain produces a cleaner sound.
10. TREBLE
Adjusts high frequency output.
11. MIDDLE
Adjusts middle frequency output.
12. BASS
Adjusts low frequency output.
13. POWER ADAPTOR/ FUSE COMPARTMENT
Connection for power cable. Use only the
power cable supplied with this amplifier.
14. POWER
On/off switch.
15. AUDIO IN
Input jack for external audio device such as
CD or MP3 player (device should have its
own volume control).
16. PHONES
Connects to stereo headphones, which
cancels speaker output.
1 4 6 3 2
14 13
FACEPLATE
BACKPLATE
REPLACING THE FUSE
An additional fuse has been enclosed in the fuse
compartment of your amplifier, directly below
the power input. The fuse compartment contains
an active fuse and a replacement. The fuse protects
against power surges. If your amplifier does not
power up as usual, the fuse may need to
be replaced.
If the fuse fails:
1. Turn the amplifier power off.
2. Unplug the amplifier.
3. Detach the power cord and set aside.
4. Carefully insert a flathead screwdriver to
open the fuse compartment. Be careful not
to break the fuse inside.
5. Remove the blown fuse from the inner
(active) slot.
6. Move the new fuse from the outer slot to the
inner slot.
7. Close the fuse compartment.
8. Discard the blown fuse.
Note: If you replace the fuse and the amplifier
still does not power up, have the unit checked by
a qualified repair technician.
Open the fuse compartment.
Remove the blown fuse from the inner (active)
slot. Move the new fuse from the outer slot to
the inner slot.
USING ANOTHER TYPE IS A POTENTIAL FIRE HAZARD.
CAUTION
REPLACE ONLY WITH SAME
TYPE 250V, 1A FUSE
.
ACTIVE FUSE
REPLACEMENT FUSE
SPECIFICATIONS
Output Power:
20 watts RMS
Frequency Range:
40 Hz ~ 8 kHz
Speaker:
8" / 25W / 4 ohms
Input Sensitivity:
26 mV
Power Supply:
Detachable,
UL-approved
power cable
Dimensions: (LxWxH)
12.5" x 13" x 6.75"
Weight:
15 lbs.
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
5 8 9 10 11 12 7
15 16
CHANNEL 1 CHANNEL 2