Quadradial 4 Adaptor Amplifier
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
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Reviewed Mar 16th, 2014 by ochenee
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.