Very very rare Vintage Marantz Quadradial 4 Amplifier. 17 July 1973 dated

Pre Amp outside and In

110/120 volts - 220/240 volts multi region

Powerful 70W/Ch @ 8 ohms 25WX4 ch speakers.

Heavy. LED upgraded and overhauled to keep optimum running.

Heavy unit.

4100This combined pre- and final amplfier takes first place in the Marantz Quadrophony. Its level and exceptional flexibility fully meet even extreme requirements. Output power 4 x 25 W sine wave or 2 x 70 W stereo (20-20000 Hz + 1 dB). Distortion and intermodulation 0.3% (20 - 20000 Hz). Input sensitivity Phono 1.8 mV/47 kOhm, input sensitivity AUX (Matrix) 180 mV/100 kOhm. 3 flat track balance adjusters. Separate height and depth adjusters for front and rear channels.

Connection for Quadro headphones

Please see my other largest Vintage Marantz collection listings on eBay by far.

Power output: 60/70W/ch into 8Ω (stereo), 25W/ X 4 ch into 8Ω (quadraphonic) 100 watts into 4 channels combined in Quad mode

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.3%

Damping factor: 40

Input sensitivity: 2mV (MM), 150mV (line)

Dimensions: 15-3/8 x 5-3/4 x 14-3/8 inches

Weight: 33lbs

Collection from RPM analogue audio. B664EB or secured delivery.

Worldwide delivery via eBay global shipping.

Like all of the Marantz dual power mode units that we have tested this 4100 is underrated for power. We clocked it at over 40 watts in 4 channel mode and over 100 watts in 2 channel mode. See the performance report below.

This is a great box. Listening to music in vari-matrix mode is an experience.

If you want to listen to 4 channel encoded vinyl, you will need to add the appropriate decoder.

From Marantz:

The Model 4100 incorporates Marantz 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.

The 4100 will also reproduce any discrete 4-channel program as well as regular stereo and monaural programs.

An optional plug-in decoder adapts the 4100 for any specific matrix system, such as Columbia's SQ.

Controls:

Selector: Phono, Tuner, Tape 1, Tape 2, Aux.

Mode: Mono, 2-CH, Discrete, Vari-Matrix, SQ-Decoder

Dimension: Vari-Matrix Mode Onlyclassicaudio.com

Remote Control: Remote, Local

Bass: Independent Front, Rear

Treble: Independent Front, Rear

Volumeclassicaudio.com

Balance: Front, Left Right (Slider)

Balance: Front, Rear (Slider)

Balance: Rear, Left Right (Slider)classicaudio.com

Switches:

Hi Filterclassicaudio.com

Monitor: Source/Tape

Monitor: Tape 1/2

Loudness

Spkr Mainclassicaudio.com

Spkr Remote

Power

Jacks:

Headphones Front

Headphones Rear

Indicators:

LEVEL METER (dB) LEFT FRONT

LEVEL METER (dB) RIGHT FRONT

LEVEL METER (dB) LEFT REARclassicaudio.com

LEVEL METER (dB) RIGHT REAR

PHONO

TUNER

2-CH

4-CH

AUXclassicaudio.com

TAPE 1

TAPE 2

Rear Panel:

AC Outlet Unswitched

AC Outlet Switched

Pre-Out (L, R, F, R)classicaudio.com

Main-In (L, R, F, R)

Tape Monitor 2 Out (L, R, F, R)

Tape Monitor 2 In (L, R, F, R)

Tape Monitor 1 Out (L, R, F, R)

Tape Monitor 1 In (L, R, F, R)classicaudio.com

Tuner (L, R)

Aux Input (L, R, F, R)

Phono Input (L, R)

Remote Controlclassicaudio.com

Power Mode: 60W X2/25W X4

Shipping Weight: 38 Pounds