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Audio Research
https://audioresearch.com/wp-content/uploads/2021/06/REF300II_Manual.pdf
The REF 300 MKII has a built-in 12VDC remote turn-on/off circuit for operation by a master control system in a home theater or large audio system. Use a 3.5mm (.140") diameter mono mini-plug to connect to the +12V IN jack on the rear of the REF 300 MKII. Two identical paralleled jacks are provided to allow chaining connections to control two
Audio Research Reference 300 MKII Tube Amps | Tube | Audiogon
https://www.audiogon.com/listings/lis9hc0d-audio-research-reference-300-tube
Audio Research Reference 300 mkII used Set of Audio Research Reference 300 Vacuum Tube Amplifiers. Both amps we're given a complete check up, tube replacement and tuning at Audio Research last year ($4.6K service). Specs here: http://... 8000.00.
ARCDB
https://arcdb.ws/REF300/REF300.html
The REFERENCE 300 as supplied from Audio Research is equipped with Russian 6550C, which is our current choice for reliability and long service. REFERENCE 300 MKII: (4 matched pairs) 6550C power output, (4) 6H30 triodes, (3) matched 6A57, (2) 6N1P.
Audio Research Reference 300 mkII Monoblock Amps | Tube ...
https://www.audiogon.com/listings/lis8fh2h-audio-research-reference-300-mkii-monoblock-amps-tube
Audio Research Reference 300 mkII for sale. Audio Research Monoblock power amps, 280W/ch, guaranteed to work. All tubes checked and chart included. Only 173.4 hours on retube by Audio Research. These are 300's converted to the Mk II, again d...
Used Audio Research REF 300 Monoblock power amplifiers for ...
https://www.hifishark.com/model/audio-research-ref-300
Audio Research Model Reference 300 Monoblock Power Amplifiers (MK1) Canuck Audio Mart CA$8,990 Apr 19, 2020. - Apr 25, 2020. HiFi Occasion. Audio research Ref 300 HiFi Occasion €8,000 Oct 24, 2019. - Jan 31, 2020. Audiogon. Audio Research Reference 300 MKII Tube Amps Audiogon $8,000 20% Oct 5, 2019. - Oct 22, 2019. US Audio Mart.
Audio Research Reference 300 Monaural Power Amplifier ...
https://www.hifiengine.com/manual_library/audio-research/reference-300.shtml
Dimensions: 483 x 267 x 597mm. Weight: 59.9kg. Year: 1999. Power output: 280 watts into 16Ω (mono) Frequency response: 0.5Hz to 160kHz. Total harmonic distortion: 1%. Damping factor: 11. Gain: 32 dB. Input sensitivity: 1.75V.
Audio Research Ref210 vs Ref300 vs VTM200 - High-End Audio ...
https://forum.audiogon.com/discussions/audio-research-ref210-vs-ref300-vs-vtm200
REF300mkII - The mkII was redesigned after the VTM200's broke new ground. Once this was done, the REF300 achieved and even higher level of musicality and power combined with the improved control and extension at the frequency extremes that was pioneered in the VTM200's.
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