{"product_id":"audio-research-reference-750-sel-monoblock-power-amplifier","title":"Audio Research Reference 750 SEL Monoblock Power Amplifier","description":"\u003cp\u003eThe Reference 750SEL monoblock amplifier is a full-scale vacuum tube design built to drive nearly any speaker with authority. Continuing the legacy of the Reference 600 it delivers over 750 watts per channel using sixteen KT150 power tubes and massive custom transformers. Its sound combines effortless power, deep controlled bass, vivid detail and expansive three-dimensional imaging. Designed for large listening rooms and demanding loudspeakers the REF750SEL creates a highly immersive musical experience, revealing subtle performance details against a quiet background while preserving scale, realism and emotional impact.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003ePower Output:\u003c\/strong\u003e 750 watts per channel continuous from 20Hz to 20kHz. 1kHz total harmonic distortion typically 0.5% at 750 watts, below .04% at 1 watt. Approximate actual power available at “clipping” 850 watts (1kHz). (Note that actual power output is dependent upon both line voltage and “condition” i.e. if power line has high distortion, maximum power will be affected adversely, although from a listening standpoint this is not very critical.)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePower Bandwidth: \u003c\/strong\u003e(-3dB points) 15Hz to 150kHz\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e (-3dB points at 1 watt) 1 Hz to 200 kHz\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInput Sensitivity:\u003c\/strong\u003e 4.6V RMS Balanced for rated output. (24 dB gain into 8 ohms)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInput Impedance:\u003c\/strong\u003e 200K ohms Balanced\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Taps:\u003c\/strong\u003e 4, 8, 16 ohms\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Regulation:\u003c\/strong\u003e Approximately 0.5dB 16 ohm load to open circuit (Damping factor approximately 17)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOverall Negative Feedback:\u003c\/strong\u003e 13dB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSlew Rate:\u003c\/strong\u003e 20 volts\/microsecond\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRise Time: \u003c\/strong\u003e1.5 microseconds\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHum \u0026amp; Noise:\u003c\/strong\u003e Less than 0.2mV RMS – 110dB below rated output (IHF-A weighted, input shorted, 16 ohm output)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePower Supply Energy Storage:\u003c\/strong\u003e Approximately 1300 joules\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePower Requirements:\u003c\/strong\u003e 105-130VAC 60Hz (200-270VAC 50Hz) 2100 watts at rated output, 2400 watts maximum, 800 watts at “idle”\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTubes Required: \u003c\/strong\u003e8 Matched pair KT150 Power Output; 1 6550WE Regulator; 1 6H30 Regulator Amplifier; 1 matched pair KT150 Driver; 1 6H30 follower.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e13.5″\u003c\/strong\u003e (34.3 cm)\u003cbr\u003e\u003cstrong\u003eW x 23″\u003c\/strong\u003e (58.4 cm)\u003cbr\u003e\u003cstrong\u003eH x 20.8″\u003c\/strong\u003e (52.8 cm)\u003cbr\u003e\u003cstrong\u003eD.\u003c\/strong\u003e Handles extend 1.5″ (3.8 cm) forward and rearward\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 170 lbs. (77.2 kg) Net; 395 lbs. (180 kg) per pair shipped weight\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Silver","offer_id":51581612032288,"sku":null,"price":42500.0,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":51581612065056,"sku":null,"price":42500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/3728\/1568\/files\/editARReference750SELsilverfront.jpg?v=1778098991","url":"https:\/\/salon1audio.com\/products\/audio-research-reference-750-sel-monoblock-power-amplifier","provider":"Salon 1 Audio","version":"1.0","type":"link"}