First Act MA104 User Manual

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6
FACEPLATE
BACKPL ATE
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7
1. INPUT JACK
Connect guitar or other instrument here
(1/4” jack).
2. VOLUME
Controls output level of amplifier.
3. LED
Light indicates power on/off.
4. GAIN
Controls input level. Increasing gain adds
distortion, or an overdriven rock tone;
decreasing gain produces a cleaner sound.
5. TONE
Turn right to add treble/reduce bass.
Turn left to add bass/reduce treble.
6. POWER
Turns amplifier on/off.
7. POWER ADAPTOR INPUT
Connect the power adaptor included with your
amp here. Use only the adaptor supplied with
this amplifier.
Output Power:
4 watts RMS
Frequency Range:
60 Hz ~ 6 kHz
Speaker:
4.5" / 8W / 4 ohms
Input Sensitivity:
26 mV
Power Supply:
14V DC 500mA
Dimensions: (LxWxH)
8" x 4" x 8"
Weight:
3.5 lbs.
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
SPECIFICATIONS
First Act Inc.
745 Boylston Street
Boston, MA 02116 USA
rstact.com

First Act MA104 Specifications

General

Wattage	10W
Channels	1
Amplifier Type	Solid State
Controls	Volume
Inputs	1/4" Instrument
Power Source	AC Adapter

Summary

Guitar Amplifier Controls and Ports

Input Jack

Connect your guitar or other instrument here via the 1/4" jack.

Volume Control

Adjusts the output sound level of the amplifier.

Gain Control

Manages input level to add distortion or achieve a cleaner tone.

Tone Control

Modifies the treble and bass frequencies of the sound.

Power Button and LED Indicator

Turns the amplifier on/off; LED shows power status.

Power Adaptor Input

Connect the dedicated power adaptor for amplifier operation.

Amplifier Specifications

Important Safety Instructions

Protection from Moisture and Liquids

Keep the unit protected from water, moisture, or any liquids.

Qualified Service Personnel

Servicing should only be performed by a qualified repair technician.

Environmental Conditions

Avoid heat sources and use in moderate climates (32-104°F).

Power Cable Safety

Protect the power cable from damage; do not use if torn.

Usage and Storage

Unplug when not in use for extended periods; turn power off.

Cleaning and Maintenance

Clean the exterior with a dry cloth only; do not use water or chemicals.

Interference Prevention

Keep unit away from radio/TV receivers to prevent interference.

Operation Precautions

Do not operate if visibly damaged, dropped, exposed to moisture, or malfunctioning.

Environmental Exposure

Avoid direct sunlight, excessive humidity, dust, and strong vibration.

Grounding and Shock Hazard

Ensure proper grounding and do not open the cabinet to prevent electric shock.