leeperry
Galvanically isolated his brain
- Joined
- Apr 23, 2004
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BTW, Gearslutz.com - View Single Post - ART MPA Gold Mods
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Home Recording - View Single Post - LME49720NA for ART Digital MPA?
Quote:
the stock 2114D on my soundcard have a 15Mhz slew rate, I think 50Mhz and above is over the top as it's too far from the original design...plus the damn thing has very crappy sockets
the first time I put 49720NA in there, they gave a wooshy sound...constantly oscillating.
so the lower the gain bandwidth, the better I'll be doing I think...the LT1358 has a 25Mhz gbw, and it sounded FAR more stable than any LM/LME part I tried..
PS: damn, some of my LT samples were "shipped" 3 weeks ago.....they use pigeons to ship them?
Quote:
Any opamp change must be viewed on a scope to determine if it's operating in a linear region.[..] Audio band parts like OPA2134, AD 8599 are usually safe, the LM4562/LME49720 is a 55 mhz bandwidth part, watch out. The LM6172 is a 100 mhz part. This is not like swapping the tubes on your old color TV, one can quickly make things worse without knowing it. |
Home Recording - View Single Post - LME49720NA for ART Digital MPA?
Quote:
The motorboating is oscilations, if you socket chips you really need to use machined sockets the flat pin ones are bad for oscilations and moaterboating and usually need decoupling caps across power an ground |
the stock 2114D on my soundcard have a 15Mhz slew rate, I think 50Mhz and above is over the top as it's too far from the original design...plus the damn thing has very crappy sockets
the first time I put 49720NA in there, they gave a wooshy sound...constantly oscillating.
so the lower the gain bandwidth, the better I'll be doing I think...the LT1358 has a 25Mhz gbw, and it sounded FAR more stable than any LM/LME part I tried..
PS: damn, some of my LT samples were "shipped" 3 weeks ago.....they use pigeons to ship them?