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Chipamp vs Cmoy

post #1 of 5
Thread Starter 
I have a lm4880 headphone amplifier and I want to know if a cmoy with an opamp opa2134 will sound better than a lm4880 or a TPA152 chips ?
Edited by mendiola - 6/20/14 at 10:44pm
post #2 of 5

Too broad a question, I think, since performance is not just about the chip but also the overall implementation. The only answer I can give is that I do prefer cmoyBB (OPA2227) over PA2V2 (Boomer series IIRC). Maybe on par if cmoyBB is with OPA2134.

post #3 of 5
Quote:
Originally Posted by mendiola View Post

I have a lm4880 headphone amplifier and I want to know if a cmoy with an opamp opa2134 will sound better than a lm4880 or a TPA152 chips ?

 

Chipamps like LM4880 or TPA152 are intended for driving small speakers. THD+N and SNR will be quite high. Minimum gain is usually 10x or greater. This is all fine for speakers; not good for headphones.

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post #4 of 5

Hi, is there any way to customize the CMOY gain to make it with no hiss, and just black for iems of 119 dB sensitivity?

post #5 of 5
Quote:
Originally Posted by SilverEars View Post
 

Hi, is there any way to customize the CMOY gain to make it with no hiss, and just black for iems of 119 dB sensitivity?

 

With 119dB/mW IEMs, it's difficult to achieve a completely black background with any amp. You can get close. Good ears may still detect hiss in a quiet ambient setting.

 

To answer your question, gain can be reduced as low as possible (2-3x for a cMoy), and smaller gain resistor values will improve the noise floor.

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