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BOSC - HiFi Monoblock Class-D Amp

orchardaudio

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#1
Currently Under Development

Preliminary Specifications:
  • Gain: 16.8dB or 6.92 (For 8 and 6Ω speakers)
  • Gain: 13.8dB or 4.89 (For 4 and 3Ω speakers)
  • Signal to Noise Ratio (SNR): 121dB (A-weighted)
  • Total Harmonic Distortion (THD): <0.0003% (-110dB) @ 7W
  • Frequency Response: DC - 60kHz
  • Sensitivity: 2.5Vin for 37.5W
  • Input Impedance: 5kΩ fully balanced for 8Ω amp
  • Input Impedance: 7.1kΩ fully balance for 4Ω amp
  • Output Power: 150W
  • Damping Factor: >400 @ 1kHz
  • Size: 5.5" (14cm) x 4.8" (12.2cm) x 1.9" (4.8cm)
IMG_1389.jpg


THD vs Power Plot 8 ohm load (Preliminary):
THD Ratio vs Measured Level.jpg




Follow this thread for updates, you can also subscribe to the mailing list on the website here: https://orchardaudio.com/bosc
 
Last edited:

Daverz

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#2
Ouch, that input impedance is really low. I do like the lower gain. An exciting development.
 

solderdude

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#4
I sure hope it has DC protection on its output ... being DC to 40kHz and all.

@Daverz talks about the input impedance being 5k (for balanced) as noted in the specs. ;)
 
Last edited:
OP
orchardaudio

orchardaudio

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Thread Starter #8
OP
orchardaudio

orchardaudio

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Thread Starter #15
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BOSC specification have been updated after the latest round of testing and can be found here:
https://orchardaudio.com/bosc
 

DonH56

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#17
Seems like fairly low gain?
 
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