Come on Papa! What's the word on your Raal Headphone Amp? I'm DYING to see this! I hope it's DIY.
Is there any more info about the mini Beast with a Thousand JFets designed for 32 ohm headphones?
I pass on reading that one he was great in police academy 😀Apparently not according to the Steve Guttenberg interview.
Is there any more info about the mini Beast with a Thousand JFets designed for 32 ohm headphones?
Actually yes. There is a Son of the Beast with 768 per channel and
a Mini Beast with 192 per channel, and a Micro Beast with 96 per channel.
The 96 per channel piece will drive 32 ohm headphones single-ended.
So far, a micro Beast is in the hands of member Biosonar, and he is
having a dandy time with it.
The Son of the Beast is set up with configurable channel boards that will
accept just about any TO-92, and you can set it up for balanced, single-
ended, complementary or CCS bias, all sorts of variations.
Jon "Mr. Fullrange" Ver Halen has made some nice cases that hold two
of those boards each.

Actually yes. There is a Son of the Beast with 768 per channel and
a Mini Beast with 192 per channel, and a Micro Beast with 96 per channel.
The 96 per channel piece will drive 32 ohm headphones single-ended.
Any estimates for the number of JFETs the Beast circuit needs per channel to drive the 300 ohm Sennheiser HD650 single ended?
done that...
@Adason: do the jfets need to be matched? I'm assuming yes. The output caps are 12v 1000uf? And what is V+ and V- ? And lastly is this really the circuit or just a simplified version? 'Cause this looks super easy, and fun, to build!
Jeffrey
Is there any more info about the mini Beast with a Thousand JFets designed for 32 ohm headphones?
Possibly DIY - there's only one headphone that would appropriate to it.
🙂
Just to clarify, the 32 Ohm headphone amps is NOT the amp for Raal SR1a headphone, correct? Raal's impedance is 0.2 Ohms...
Thanks Rodeodave😉
jeffrey
@Adason: do the jfets need to be matched? I'm assuming yes. The output caps are 12v 1000uf? And what is V+ and V- ? And lastly is this really the circuit or just a simplified version? 'Cause this looks super easy, and fun, to build!
Jeffrey
Power supply is +/- 3 volts...its in the circuit. I use batteries.
Matching...yes. Inspite of matching, i had small dc offset on output, so i put cap there.
Real circuit, not simplified. Have you seen Nelson's beast with thousand jfets schematics?
Power supply is +/- 3 volts...its in the circuit. I use batteries.
Matching...yes. Inspite of matching, i had small dc offset on output, so i put cap there.
Real circuit, not simplified. Have you seen Nelson's beast with thousand jfets schematics?
Thanks Adason! Good idea on the output cap. And no i have not seen Nelson's beast schematic figuring since I have only a handfull of jfets why torture myself with the undoable, but maybe i'll take a peek for inspiration.
Jeffrey
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