BOSC™ - 150W HiFi Monoblock GaN Audio Amplifier

BOSC amplifer rear view

Small but Packs a Massive Punch

BOSC monoblock audio power amplifiers were conceptualized to provide the listener with a truly life-like musical experience, presented with every significant detail intact, in order to convey an emotional connection to the music.


BOSC amps use the latest state-of-the-art electronics, including gallium nitride (GaN) technology to achieve ultra-high performance in an easy-to-use small package that will blend into any decor.

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BOSC™ Inline Amp

Awkward packaging... Yes, but with good reason. The amps are made small and with connectors on opposite sides, allowing you to place the amplifier right behind the speaker. This has multiple benefits:

  1. The amplifier has an easier time controlling the speaker, this produces a more accurate sound.
  2. Preserves the amplifiers high damping factor (low output impedance).
  3. Save money on long and expensive speaker cables.

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Reviews

Adam LaBarge - The Audio Beatnik

"I wanted to stop my heart so I could hear the music better. I was being sucked in, pushed out, and unable to focus on anything else but the music. There were all the little bird-like chimes, dancing between clicks and pings and bongs of xylophone harmonics with dry reed raspy sounds zooming in and out, floating on top of deep rolling strings and organ-like bass. I didn’t want to miss a moment of it."


Jack Roberts - The Audio Beatnik

" I found them very dynamic, very musical, and beautifully detailed in the top end. The tone was better than in many transistor amps. The same could be said about emotional involvement. Listenability was very good with a relaxed and detailed sound. The soundstage and imaging were also very good. "


Paul Rigby - The Audiophile Man

"I immediately noticed a major drop in high frequency noise and a swathe of new air and space within the midrange which pushed open the soundstage, expanding it left and right. All of the reconstruction work of the soundstage created a new level of clarity and transparency."

and

"Sound quality is quite sublime for the price, detail, character, clarity, it’s all there. A fascinating power amplifier and definitely one to investigate."


Michael Connelly - Audio Nervosa

"Bottom line: I thoroughly enjoyed my time with the BOSC amps and think they form an amazing combo with the PecanPi Streamer.  Their strength for me is that they were able to take what was a background music system at best to something far, far better.   I have no doubt that they will shine best when matched with a high-quality pair of speakers.   If you like your music open, honest, highly engaging with life-like detail readily conveyed, I think these are absolutely worth a listen. "

Specifications

  • Gain: 16.8dB or 6.92 (Recommended for 6 to 8Ω speakers)
  • Gain: 13.8dB or 4.89 (Recommended for 3 to 4Ω speakers)
  • Signal to Noise Ratio (SNR): 121dB (A-weighted)
  • Residual Noise: 32uV
  • THD* @ 10W: <0.0003% (-110dB) for 1kHz into 8Ω
  • THD @ 0.25W: <0.0030% for 20Hz - 20kHz into 8Ω
  • THD @ 10W: <0.0013% for 20Hz - 20kHz into 8Ω
  • THD @ 75W: <0.0050% for 20Hz - 20kHz into 8Ω
  • THD @ 150W: <0.015% for 20Hz - 20kHz into 8Ω
  • THD @ 10W: <0.0004% (-108dB) for 1kHz into 4Ω
  • THD @ 0.25W: <0.0030% for 20Hz - 20kHz into 4Ω
  • THD @ 10W: <0.0025% for 20Hz - 20kHz into 4Ω
  • THD @ 75W: <0.0092% for 20Hz - 20kHz into 4Ω
  • THD @ 150W: <0.015% for 20Hz - 20kHz into 4Ω
  • Frequency Response: DC - 60kHz+
  • Sensitivity: 5Vin for 150W
  • Input Impedance: 5kΩ fully balanced for 16.8dB gain amp
  • Input Impedance: 7.0kΩ fully balanced for 13.8dB gain amp
  • Output Power: 150Wrms
  • Damping Factor: >550 @ 1kHz
  • BOSC Size:  5.5" (14cm) x 4.8" (12.2cm) x 1.9" (4.8cm) -- not including binding posts
  • Power Supply Size: 8" (20.4cm) x 3.7" (9.4cm) x 1.72" (4.35cm) – not including cables


*THD - Total Harmonic Distortion 

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