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The Audio Research Reference 750 SEL monoblock amplifier delivers over 750 watts of continuous power into speaker loads of 4 to 16 ohms, utilizing sixteen KT150 vacuum tubes per channel along with 6550WE and 6H30 tubes for power supply regulation. It features a fully balanced circuit topology with a single balanced XLR input, custom-built power and output transformers, and extensive tube matching and burn-in for reliability and sonic excellence. The SEL is the final and limited edition version of the 750 series, produced in only ten pairs, incorporating 23 new wires and 26 new capacitors for enhanced sound quality. It offers a frequency response from 1 Hz to 200 kHz, a power bandwidth of 15 Hz to 150 kHz, and a slew rate of 20 volts per microsecond. The amplifier is noted for its ability to deliver detailed, dynamic, and immersive musical experiences with low distortion and noise. Dimensions are approximately 13.5" W x 23" H x 20.8" D, weighing 170 lbs per unit. This amplifier is a pinnacle of Audio Research's tube amplifier design and craftsmanship, aimed at audiophiles seeking the highest fidelity and power in music reproduction.
Amplification power output and characteristics
Analog signal output specifications
Input and output connections
Size, weight, and appearance
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Estimated price (community-sourced)
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The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The Hercules II's power @ 8ω is 550W against the Reference 750 SEL Mono's 750W, its power @ 4ω 750W against 850W, its damping factor >100 against 17, and its input sensitivity 1.0V RMS against 4.6V RMS.
The Reference 160S's power @ 8ω is 140W against the Reference 750 SEL Mono's 750W, its damping factor 14 against 17, and its input impedance 300000Ω against 200000Ω. Both share class (Tube).
Both turn up in the same documented systems.
The REF 610T's power @ 8ω is 600W against the Reference 750 SEL Mono's 750W, its damping factor 16 against 17, and its input sensitivity 4.2V RMS against 4.6V RMS. Both share class (Tube).
The 2060's power @ 8ω is 600W against the Reference 750 SEL Mono's 750W, its power @ 4ω 1.2kW against 850W, its class A against Tube, and its weight 108.86 kg (240 lbs) against 77.2 kg (170 lbs).
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