Shpongle_Dongle
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- Jan 26, 2007
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Quote:
LM4562 is a superb sounding opamp. A good friend of mine (with golden ears) is auditioning a CanAmp at the moment and will be rolling his LM4562, OPA627 and AD-823 in over the next few days, I'll try to get him over here with his impressions. My own impressions were AD-823 sounded the most organic and natural, the AD8620 slightly rounded and bass shy NE5532 full, bloomy but musical OPA627 chocolaty, rose tinted inoffensive LM4562 slightly more presence to the sound, extremely musical (toe tapping) but slightly less bass extension. Other opamps worth trying here have to be OPA2107, OPA2111 (nice) OPA2132P, OPA2134P, OPA2604 etc etc Too many to list and, as daggerlee says the differences will be "minimal" and not night and day. There's not a lot you can do externally (outwith the confines of the op amp) apart from trying different capacitor types / values (I think someone already mentioned that replacing the 4700uF power caps with 10,000uF made an audible improvement.... yes, it will) Diodes seem to have been covered too, ultrafast much better than the standard 1N4002 types that are fitted. Nobody seems to have mentioned the fact that the PSU section is "unregulated" I'd lose that onboard 9V encapsulated transformer and feed the CanAmp with a good quality regulated / linear offboard dedicated PSU... we are getting into two box territory here (PSU / Amp) but must sound better with a regulated PSU instead of 9V straight from a 110AC to 9DC encapsulated transformer. Maybe not, maybe there's method in Heed's madness and Raw DC power is the reason this guy sounds so good... the jury is out, I'll see what she sounds like with a dedicated "regulated" PSU and report back.
Great thread by the way.
Originally Posted by daggerlee /img/forum/go_quote.gif Have been rolling opamps - so far I have to say my favorite is the LM4562, it has the nice roundedness of the OPA627 sound, but sounds as 'fast' as the AD8620. Although truth be told, at least to these ears the differences are minimal, and I'd be happy with any of the three - OPA627, AD8620, or LM4562. |
LM4562 is a superb sounding opamp. A good friend of mine (with golden ears) is auditioning a CanAmp at the moment and will be rolling his LM4562, OPA627 and AD-823 in over the next few days, I'll try to get him over here with his impressions. My own impressions were AD-823 sounded the most organic and natural, the AD8620 slightly rounded and bass shy NE5532 full, bloomy but musical OPA627 chocolaty, rose tinted inoffensive LM4562 slightly more presence to the sound, extremely musical (toe tapping) but slightly less bass extension. Other opamps worth trying here have to be OPA2107, OPA2111 (nice) OPA2132P, OPA2134P, OPA2604 etc etc Too many to list and, as daggerlee says the differences will be "minimal" and not night and day. There's not a lot you can do externally (outwith the confines of the op amp) apart from trying different capacitor types / values (I think someone already mentioned that replacing the 4700uF power caps with 10,000uF made an audible improvement.... yes, it will) Diodes seem to have been covered too, ultrafast much better than the standard 1N4002 types that are fitted. Nobody seems to have mentioned the fact that the PSU section is "unregulated" I'd lose that onboard 9V encapsulated transformer and feed the CanAmp with a good quality regulated / linear offboard dedicated PSU... we are getting into two box territory here (PSU / Amp) but must sound better with a regulated PSU instead of 9V straight from a 110AC to 9DC encapsulated transformer. Maybe not, maybe there's method in Heed's madness and Raw DC power is the reason this guy sounds so good... the jury is out, I'll see what she sounds like with a dedicated "regulated" PSU and report back.
Great thread by the way.