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gripracer · 26th October 2010, 07:34 AM

CMOY KILLER Class-A Headphone Amplifier/Buffer 500mWpc! - eBay (item 190460079967 end time Nov-22-10 15:06:14 PST)

These sold pretty quick last time I had them, they are simply one of the lowest distortion headphone amp designs I have ever seen, and they have an OVERKILL amount of output current ability

Thanks guys
-Ted

maxw · 26th October 2010, 09:12 AM

What's the gain? Got a schematic?

jmillerdoc · 26th October 2010, 09:54 AM

What type of power supply do you recommend for this? Regulated, unregulated, etc...

gripracer · 26th October 2010, 10:03 AM

Quote:

Originally Posted by maxw

What's the gain? Got a schematic?

voltage gain is 21, but I can make it any value you want.

Quote:

Originally Posted by jmillerdoc

What type of power supply do you recommend for this? Regulated, unregulated, etc...

Honestly anything will work, as long as it's bipolar, can deliver about 3 amps max, and anywhere between +-12 and +-18. The op-amps have an amazing PSRR, so power supply noise doesn't affect anything. Even a bipolar SMPS would be just fine.

I would just throw together a transformer, a bridge rec, and 2 decent caps. Easy.

jackies · 26th October 2010, 11:31 AM

Evidently, schematic is straight from the datasheet?
What exactly makes it Class A?

gripracer · 26th October 2010, 11:41 AM

Quote:

Originally Posted by jackies

Evidently, schematic is straight from the datasheet?
What exactly makes it Class A?

pretty much, except there are two buffers instead of one. using a buffer as an output stage after an op-amp forces the op-amp into class-a (always on).

theAnonymous1 · 26th October 2010, 12:34 PM

Quote:

Originally Posted by gripracer

pretty much, except there are two buffers instead of one.

....and no servo.

26th October 2010, 07:34 AM	#1
gripracer Banned Join Date: Mar 2009 Location: Atlanta, GA	More CMOY KILLERS now available! CMOY KILLER Class-A Headphone Amplifier/Buffer 500mWpc! - eBay (item 190460079967 end time Nov-22-10 15:06:14 PST) These sold pretty quick last time I had them, they are simply one of the lowest distortion headphone amp designs I have ever seen, and they have an OVERKILL amount of output current ability Thanks guys -Ted

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26th October 2010, 09:12 AM	#2
maxw diyAudio Member Join Date: Jun 2004 Location: London	What's the gain? Got a schematic?

26th October 2010, 09:54 AM	#3
jmillerdoc diyAudio Member Join Date: Mar 2009 Location: Lawton, OK, USA	What type of power supply do you recommend for this? Regulated, unregulated, etc...

26th October 2010, 11:31 AM	#5
jackies diyAudio Member Join Date: Nov 2007	Evidently, schematic is straight from the datasheet? What exactly makes it Class A?

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