Quote:
Originally posted by MIKEHARRIS
the single 550 is actually a 550a-1....with a 5534 type opamp in place of 2520 .. to give some 'different' sound...supposedly preferred by the japanese market. The only mod which seems to have merit is to utilize the Millennia opamp in the APi circuit...but i would defer to others that have tried this for details |
There really isn't shit you can do to make a 550A-1 sound like a 550A... the upside is that if you don't get fooled into buying a 550A-1 for the price of a 550A you're going to end up with what is still a pretty decent equalizer for a rather budget price.
In other events, if I'm not mistaken, the Millennia op-amp is a different version of the Jensen 990 op-amp... which runs on bi-polar 24vdc. An API 2520 runs on bi-polar 16vdc... so while a 990 style op-amp will indeed work, it will be underpowered and not performing to the peak of it's abilities.
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Mercenary Audio mwagener wrote on Sat, 11 September 2004 14:33
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