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Garrard MRM 101

Music Recovery Module (1978)

Garrard MRM 101


The MRM 101 (Music Recovery Module) is designed to remove the objectionable noises heard when a phono pickup meets a scratch on the record being played.

It is not intended to remove all noises associated with old, worn or generally dirty records.

Since these noises occur in an almost continuous manner, their detection could lead to the removal of a substantial proportion of the original recording.

The MRM contains a high quality stereo preamplifier with magnetic phono inputs.

This allows the MRM to be simply and directly connected to the amplifier 'aux' or 'tuner' inputs.

The scratch detection circuit recognises the whole waveform of the scratch and distinguishes it from the peaks of the recorded music.

In order to make the decision to remove the scratch, the channels are individually delayed by a few milliseconds without limiting the audio frequency range.

After recognising the scratch, a specially designed network isolates the signal for sufficient time for the scratch noise to pass out of the delay line.


Input: suitable for cartridges with an output of 0.7 to 2mV

Input impedance: 47k ohm

Frequency response: 20Hz to 20kHz

Dynamic range: greater than 100dB

Distortion: less than 0.1% THD

Channel balance: better than 2dB

Nominal output: 300mV RMS

Power supply: 120V AC 50/60Hz 7VA or 220/240V AC 50/60Hz 7VA

Dimensions: 378 x 298 x 71mm

Weight: 3.7kg


instruction/owners manual  English - bigsky

review (ETI Oct 1978)  English - canoeist

service manual  English

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Garrard MRM 101 / MRM-101 owners manual, service manuals and schematics are for reference only and the Vinyl Engine bears no responsibility for errors or other inaccuracies. The PDF files are provided under strict licence. Reproduction without prior permission or for financial gain is strictly prohibited. This website is not affiliated with or sponsored by Garrard.