Cmoy vs ____? CMoy = better/same?

[oicdn]

Been readin a bit about some DIY amps and was thinking about giving a CMOY a shot. Some people report very comparable sound depending on the opamp and configuration. I'm not quite sure on specific configuration though.

Example, anybody compare a cMoy using the AD8397 op amp to a higher end amp like a portaphile, Larocco or Hornet? I saw like one person on eBay, and a couple other various people use it, but ehard nothing else other than the use of that opamp.

If you connect a resistor between each rail and ground, and it's of the same value, you split the voltage going in, so you end up with half of whatever you put in on each side, right? Add an op-amp, you just put that after that "resistive divider" and it then feeds power from its output to power the other op-amp, resulting with a impedance of near zero, right?

So why wouldn't this sound be VERY comparable to a higher end amplifier, as well as being able to adapt to the impedance of the phones being plugged in (like higher end amplifiers)? Use Ceramic to keep it stable throughout to minimize distortion would also benefit the sound correct?

I dunno, all this amplifier talk is making me antsy for the Tampa meet, lol.

 

[silverrain]

FWIW -- I don't know what was inside of them, but I bought/sold several of those CMOY-type amps (that's what the various makers/sellers called them) over the last 2-3 years on ebay, and none of them came even close to the SQ of the HeadRoom Total Airhead, much less the HR Micro and Desktop amps.
Maybe there are some better ones now?

 

[oicdn]

Well, I was looking at all the cmoys on eBay and they all seem to be LM or OPA variants, nothing AD...

 

[fordgtlover]

If you post the electronics part of your question in the DIY section you're likely to get a better rate of response than here in the amp section. Cheers.

 

[oicdn]

Will do!