Rolls MA251H Compact Stereo 20W Class D Mixer Amplifier

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About the Rolls MA251H

The Rolls MA251H (the H is a high powered version of the MA251) is a compact class D stereo amplifier with a 4 CH. stereo mixer built in. It has 20 watts per channel @ 4 Ohms. The class D low heat design gives the MA251H the ability to be mounted in very tight applications. It will work great in ceilings by projectors, or anywhere small and heat free amplification is required.

The MA251H is in an all metal chassis. Bottom mounts are provided for permanent installations. The MA251H has an included 24 VDC external power supply. The 4 channel mixer section consists of 2 separate RCA stereo inputs, along with an XLR mic input and a 3.5mm (1/8") stereo input perfect for an ipod or laptop computer type input. Phantom power is supplied to the XLR input by a switch on the back of the MA251H.

Rolls MA251H Includes

  • Rolls MA251H Compact Stereo 20W Class D Mixer Amplifier
  • 12 VAC PS12 External Power Supply
  • Rolls 1 Year Parts and Labor Limited Warranty

Rolls MA251H Specifications

Line Input Impedance 10K Ohms line
600 Ohms mic
Power Output 20 watts X 2 @ 4 Ohms
Voltage Gain 55 dB mic
30 dB line
Maximum Supply Voltage 24 VDC
THD 0.05% typical
Efficiency 85%
Bandwidth 20Hz - 25 kHz
Dimensions (W x H x D) 6.75" x 3.5" x 1.5" / 17.14 x 8.89 x 3.81 cm
Weight 1 lb / 0.45 kg
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