InterM MA-103 Mixing Amplifier

The Class-D Inter-M MA Series 3-channel amplifier is designed for easy integration into both low impedance and 70V/100V line systems, making it ideal for space-constrained environments such as retail and educational settings.

This amplifier features three mic/line inputs with various connection types. Channel 1 includes a 3-pin XLR input with a dedicated phantom power switch, while a secondary input via a 6.35mm jack on the front panel overrides the XLR input. Channel 2 also uses a 6.35mm jack, and Channel 3 offers dual RCA (phono) or 6.35mm jack options. Channels 1 and 2 are independently switchable between mic and line modes. Speaker output is provided through a terminal block, supporting 4Ω, 70V, or 100V line configurations. Additionally, a telephone input with priority and an external mute remote connection are located on the same terminal block. Power is supplied via a captive mains cable.

The front panel features rotary volume controls for inputs 1–3, each with individual signal LEDs, global bass (100Hz) and treble (10kHz) adjustments, and a master volume control. A blue LED indicates power, and the unit is equipped with a push-button on/off switch located on the right side.

SKU: MA103 Category: Tag:

Product Features

■ Compact Design

Designed for easy installation and operation, featuring a compact 1U size with efficient functionality.

  • Digital Amplifier Circuit
    Utilizes a high-efficiency digital amplifier circuit, delivering 30W rated power with excellent reliability, low weight, and minimal heat generation.
  • Power Supply via SMPS
    Equipped with a Switching Mode Power Supply (SMPS) for low energy consumption and reduced weight.
  • Multiple Input & Additional Features
    Offers three input channels with versatile connections, including 3.5mm 3P Euro input, 6.3mm and 3.5mm phone jacks, and RCA cables. Includes TEL-IN and a Priority function for enhanced convenience.
  • Tone Control Function
    Features separate Bass (300Hz) and Treble (10kHz) controls for customizable sound adjustments, allowing easy tuning of both bass and treble frequencies.
  • Priority Broadcast Function
    Incorporates a Priority Broadcast function to control input signals, with a hierarchy of TEL-IN > INPUT 1 > INPUT 2 = INPUT 3.

Product specification

MA-103
Rated Output Power 30W
Speaker Output Power / Impedance 15.5V/8Ω, 70V/166Ω, 100V/333Ω
Input Sensitivity / Impedance MIC (BALANCE) -60dBu/2kΩ
LINE (BALANCE) -15dBu/2kΩ
RCA (UNBALANCE) -15dBu/20kΩ
3.5Φ PHONE JACK (UNBALANCED) -15dBu/2kΩ
TEL IN 0dBu/5kΩ
LOW IMPEDANCE (8Ω) LINE,RCA,TEL IN

Frequency Response (1W,±3dB)

 200Hz ~ 18kHz
LOW IMPEDANCE (8Ω) MIC

Frequency Response (1W,±3dB)

 200Hz ~ 13kHz
T.H.D – 1/3Pwr Less than 0.5%
S/N MIC Better than 55dB
LINE, TEL IN, Better than 75dB
RCA, 3.5Φ PHONE JACK Better than 75dB
Tone Control BASS(300Hz) ±10dB
TREBLE (10kHz) ±10dB
Operating Temperature -10℃ ~ +40℃
Power Source AC 100 ~ 240V, 50/60Hz
Power Consumption 10.5W(1/8W)
Weight (SET) 1.5kg
Dimensions (SET) 210(W) x 44(H) x 180(D)mm

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