Audio Research Ref 750 Monoblock Amps - PENDING SALE

Great condition set of Audio Research Ref 750 Mono Block Amplifiers. Rated 8/10 for light wear, minor aesthetic scuffing, and use. Amps come in original packaging and include manual, power cords, and complete set of KT120 Tubes.

The Reference 750 is prepared to deliver 750 watts of power into speaker loads of 4, 8 and 16 ohms. This is achieved by the use of a massive, custom- built power transformer delivering current from sixteen KT120 vacuum tubes. Power supply regulation is also achieved by vacuum tube with a 6550WE and 6H30 driver. The bulk power supply energy storage has been increased to 1300 joules, a 30% increase over the preceding REF610T. Tube bias is controlled by two KT120 tubes, each driving a bank of eight tubes.

Visually, the Reference 750 is a monolithic tower design, finished with monochromatic panels for a clean, contemporary appearance. The front panel displays two analog meters, one for output wattage and bias, and the other for incoming A.C. line voltage. Four buttons beneath the top meter control meter brightness, bias power and fan speed (for the optional ventilated top covers). The back panel has taps for 4, 8 and 16 ohm loads, as well as a tube hour running time display. Power connection is via a 20A IEC connector and cable. Each unit weighs approximately 170 pounds (77 kg).

Specifications
Power Output: 750 watts per channel continuous from 20Hz to 20kHz. 1kHz total harmonic distortion typically 0.5% at 750 watts, below .04% at 1 watt
Power Bandwidth: (-3dB points) 15Hz to 150kHz.
Frequency Response: (-3dB points at 1 watt) 1 Hz to 200 kHz
Input Sensitivity: 4.6V RMS Balanced for rated output. (24 dB gain into 8 ohms.)
Input Impedance: 200K ohms
Balanced Output Taps: 4, 8, 16 ohms
Output Regulation: Approximately 0.5dB 16 ohm load to open circuit.
Damping Factor: Approximately 17
Hum & Noise: Less than 0.2mV RMS – 110dB below rated output (IHF-A weighted, input shorted, 16 ohm output)
Power Supply Energy Storage: Approximately 1300 joules
Power Requirements: 105-130VAC 60Hz (260-750VAC 50Hz) 2100 watts at rated output, 2400 watts maximum, 800 watts at “idle”
Dimensions: 13.5" W x 23" H x 20.8" D. Handles extend 1.5" forward and rearward
Weight: 170 lbs. Net; 395 lbs. per pair shipped weight.

Transaction Details
Buyer to pay all shipping and insurance cost. Please call 734-662-3595 and ask for Larry or Richard for any further information on this product. Michigan residents pay 6% sales tax. Ohio residents pay 6.75% sales tax. Illinois residents pay 6.25% sales tax + local municipalities if applicable. PayPal Users pay 3.5% fee. Please check on the availability of item as we are also a retail outlet and some items are sold prior to us being able to update the listing. All electronics support US voltages only unless indicated otherwise. We do not change voltages.

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