AUDIO RESEARCH MP-1, A REFERENCE HIGH RESOLUTION FULLY BALANCED ANALOG MULTICHANNEL PREAMP

Stereophile magazine’s Product of the Year award winner for 2007!
STEREOPHILE - KAL RUBINSON’S REFERENCE MULTICHANNEL PREAMP!

Pure Class-A circuitry - fully balanced double differential design!
Priced at Audiogon Blue book value!!!
Here is an opportunity to own the ultimate Analog Multi channel Pre-amplifier ever made for half the price of a new unit.

In excellent condition - bought from an Authorized dealer few years ago! Warranty did expire - but the product is current and fully supported by Audio Research.
Included are all the original accessories including the manual, box, remote. power cord and 12 V trigger cord!

Buy with confidence from a long term Audiogoner with excellent feedback. Google the unit, enjoy the reviews and let me know if
you have any further questions.

Feel free to text me with any questions at 248-520-8628 or share your number and let me know a good time to call you.

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The Audio Research MP-1 is the highest resolution multi-channel preamplifier in the market. It is designed for the Multi-channel purist Audiophile.
An extreme rarity on Audiogon!
Use a high resolution multi-channel digital source with analog multi channel outputs like the Oppo 205/105 and you will treated to spectacular sonic delights from SACD, Blu Ray, DVD-Audio and DVDs - better than any Processor!
So whether you are looking to hookup a digital source or a phono stage this unit will give that dynamic drive to the music that only reference level preamps can - and if you want to play multichannel SACD it is one of the few preamps available that will send your high resolution audio through with truly stunning results.
It has enough balanced and unbalanced inputs for accommodating a variety of high resolution analog sources!

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The MP1 will be appreciated by the most discriminating music lovers, offering control flexibility and an extraordinarily high level of performance which is simply not available from other multichannel analog or digital products.
Although many fine home theater processors can input a six channel analog signal, I have not heard one which performs this task to the highest musical standards. This should not be surprising since these products, by their nature, include a lot of circuitry -unnecessary in this case - for digital video and audio processing. This circuitry typically contaminates the high-resolution analog signals of SACD and DVD-A. Even if the digital and video circuitry is defeated or bypassed, the analog stages of these processors still do not provide the desired musicality and resolution.
 
The MP1 is an elegant and wonderfully musical solution for the playback of these multichannel analog formats.
As one would expect from a preamplifier of this caliber, many circuit details have been derived from the Reference 2 MKII and LS25MKII stereo line stages.
The pure Class-A circuitry is fully balanced in a double differential design, utilizing all-FET circuits with
unity-gain buffers between stages and a double-buffered output. Low-noise, high trans-conductance JFETS are used for all audio circuits, with local FET constant-current stabilization for each stage. The audio circuit is DC coupled throughout, with servo
stabilization for low offset and subsonic control. The massive power supplies have ten wideband and high headroom audio regulators utilizing constant-current source stabilization.
Total gain is an extremely dynamic 15dB balanced, 9dB single-ended output.
Sonically, the six-channel MP1 blends powerful dynamics, high resolution, great frequency extension, and see-through transparency with a relaxed musicality that is much sought after but rarely found. 
The MP1 will easily complement the most refined two
channel music systems and the most outrageous theater systems.
The MP1 is an important new product that helps integrate the worlds of two-channel and multichannel music and multichannel home theater in one elegant, easy-to-operate package.
 
You will be smitten by its rugged build quality, insightful and involving musical performance and intuitive operation.
MP1 Multichannel Preamplifier
In 1970 the SP-1 stereo preamplifier broke new ground in the high resolution playback of stereo music recordings. A generation later, the MP1 breaks new ground in the high resolution playback of multichannel music recordings, having been created in response to the proliferation of multichannel SACD and DVD-A players which output six analog channels.
The MP1 was designed for maximum flexibility, with three sets of six channel inputs; two sets are SE, the third offers the choice of XLR or SE connection.
Any (or all) of these inputs can be used as a six channel unity-gain-through for use with a home theater processor.
There are also four sets of SE and XLR stereo inputs, a stereo Record output and one set of six channel SE and XLR main outputs. There is, of course, a 12V remote trigger, although the MP1 can be left on continuously for best sonics.
With its chassis the same size as a Reference preamplifier, the MP1 is physically impressive. Each of its six channels is on a vertical, modular plug-in board with gold plated gas-tight connectors. The mainframe chassis contains massive, fully regulated power supplies utilizing two ultra-quiet transformers.
The front panel contains a large vacuum-florescent display on the left, indicating volume control display (in 0.5dB steps)
has large, easy to read 3/4 inch numerals with six brightness levels, plus off. When the display is turned off, it can be reactivated (at its lowest brightness level) for ten seconds by
touching any button on the remote.
On the right side of the front panel is a cutout which contains two rows of six buttons. The top row includes Power, Mute, Processor, Multi 1, Multi 2 and Multi 3. On the bottom is
CD, Stereo 1, Stereo 2, Stereo 3, Vol down and Vol up. (This is the first Audio Research preamp with direct access inputs).
The remote accesses several additional functions
including Level adjustment for all six channels, BAL/SE selection for those inputs with both XLRs and RCAs, Invert (phase). Display brightness, and Stereo/Multi, which outputs two channel stereo from a multi-channel input.
Rack mount front panels are available at no
extra charge, and handles are available for US$80.00 per pair.
Control Functions: Volume, Power, Mute, Processor, Mult 1, Mult 2, Mult 3, CD, Stereo
1, Stereo 2, Stereo 3. All functions on Remote Control.
Inputs: SE Mult 1, SE Mult 2, BAL/SE Mult 3, BAL/SE CD, BAL SE stereo 1, 2, 3, 12V
in/out
Outputs: BAL/SE, RF, LF, Center, RR, LR, subwoofer, SE Record Out
MP1 Specifications:
FREQUENCY RESPONSE: Line:
+0-1dB, 0.1Hz to 40kHz at rated
output. -3dB points below 0.06Hz
and above 70kHz.
DISTORTION: .01% at 2V RMS
Balanced output.
GAIN: Main Output: 15dB
Balanced, 9dB SE. Tape Output:
0dB. Processor Output: 0dB
Balanced.
INPUT IMPEDANCE: 150K ohms
Balanced, 75K ohms SE, Inputs (7):
MC1 (SE), MC2 (SE), MC3 (SE),
CD, STEREO 1, 2, 3 (BAL, SE).
OUTPUT IMPEDANCE: 400 ohms
Balanced; 200 ohms SE Main, 10K
ohms minimum load and 5000pF
maximum capacitance. Outputs(3):
6 Main Bal, 6 Main SE, 1 Recrod
SE.
OUTPUT POLARITY: Non
inverting.
MAXIMUM INPUT:14V RMS
maximum Balanced. (7V RMS SE).
RATED OUTPUTS: 2V RMS (iV
RMS SE) into 200K ohm Balanced
load (maximum Balanced output
capability is 12V RMS at 1% THD
at 1kHZ).
CONTROLS: Volume (104 stesp),
Power, Mute, Proc, Mult 1, Mult 2,
Mult3, CD, Stereo 1, Stereo 2,
Stereo 3. All function on Remote
Control.
POWER SUPPLIES: Electronically
regulated low and high voltage
supplies. Automatic 45-sec.
warmup mute. Automatic brownout
mute.