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Marantz 2440

Quadradial 4 Adaptor Amplifier

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Marantz 2440


The Marantz model 2440 quadradial adaptor amplifier converts any stereo system with tape source monitor feature to a full featured 4-channel system.

The 2440 incorporates Marantz's exclusive vari-matrix circuit which simulates 4-channel sound from normal 2-channel stereo programs, and is capable of reproducing 4-channel sound from any matrix encoded source.

It will also reproduce any discrete 4-channel program as well as regular stereo and monaural programs.

An optional plug-in decoder adapts the 2440 for specific matrix systems such as Columbia's SQ or Electro-Voice Stereo 4.


Power output: 20W/ch into 8Ω (stereo)

Frequency response: 5Hz to 45kHz

Total harmonic distortion: 0.3%

Damping factor: 45

Input sensitivity: 150mV (line)

Signal to noise ratio: 80dB (line)

Channel separation: 30dB (line)

Output: 1V (Pre out)

Dimensions: 17-1/3 x 5-1/3 x 14-3/8 inches

Weight: 24.2lbs



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Reviewed Mar 16th, 2014 by

I have had this unit since it was new, matched with my Marantz 2226-B reciever, works great to this day and sounds great pumped through my (2) M-400t Carver cube's, and Bose speakers, the only thing i dont care for is the balance (slider) controls.



re: 2440

How to connect my marantz 2220 to my 2440 amp

This website is not affiliated with or sponsored by Marantz. To purchase 2440 spares or accessories, please contact the company via their website or visit an authorised retailer.