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Best sounding cheep op-amp for CMoy's? OPA2227, OPA2228, AD8066...other? - Page 4

post #46 of 48
8/6/10 at 1:33am

OPA2137 is great when stable. I had problems with the OPA2137 in one of my headphone amps so I left it alone. But when stable, I like it very much. It's pretty confusing that such a slow op-amp produces artifacts, i.e. on piano notes being obvious it's instability. AD8066 is interesting for bass alone. Otherwise, you can use the AD8599 for instance.

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post #47 of 48
8/6/10 at 4:58pm
Quote:
Originally Posted by balou View Post

joshatdot, you could diy adapters, see here: http://www.headphoneamp.co.kr/ftp/si.../Tip/SMD-4.jpg

yup, browndogs are expensive as hell... first you think 'only 3$ per piece'.. but you have to order alot of them.

I recently got on a opamp buying spree... I already have or will receive:
NE5532
LM6172
LM4562
OPA2107
OPA2604
OPA2227
OPA2132
NJM4556
AD8066
AD823
AD843
AD744
AD8620
RC4558

now I just have to order parts for my pimeta (board has already arrived) and compare them & write a review here

fortney: considering opamps, I think a long time listening test is more suitable. I must say, short-time a/b-ing seems inferior to me. well, except if it's a very clear difference between two opamps

majkel: you seem to have a non-standard opamp liking. would you care to explain which opamps you like and why?
Filburt also seems to have a quite different oppinion about popular opamps, would be nice if he'd posted in here too


I have some RC4558s. The JRC4558 is used in my NAD 1130 preamp, which was one of my very first headphone amps. I still really like listening to it, and it's fun to play around with the bass and treble. I think nikongod uses JRC4556s in his balanced cmoy.
 

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post #48 of 48
6/22/11 at 9:44am

I see that your post is years old, however I am having a cmoy amp built and wanted to know if the AD825 is still the best chip to use. I like punchy, hard hitting bass, very detailed mids & highs. Great soundstage. I listen to mostly hard rock. Looking at your detailed  reviews of all those chips, I am undecided on the following chips; AD8066, AD8620, TLE2082, TLE2142, AD8397, or AD825

I am very new to this and would appreciate your advice. I am not sure if this would affect your recommendation, but I will be using Koss Portapro headphones with the following specs; 15-25,000Hz, Impedance 60 ohms, sensitivity 101 dB SPL

 

Thank You 

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