[sdiy] best opamps for line level to synth level preamps

megaohm megaohm1 at gmail.com
Mon Jul 25 19:02:00 CEST 2005


> I rather suspect you just destroyed another audiophile myth. ;-)
> I bet many of those who claim "this opamp sounds better" never did a
> direct A/B comparison like you describe.
> 
> At which gain were the opamps running?
> 

I'm not sure what the gains were, though they all had their pots set
the same. I took "line level" signals and boosted them to be the same
level as my VCO outputs (10Vp-p).

The schematics are on Ken's CGS website under stompbox adaptor and the
EFM schematic is from the older series LFO RM preamp module.

Different opamps are optomized for different gains. Some unity,some
>5,etc. So I'm guessing different circuits could yield different
results. Don't take the results of this test as "gospel truth". I
think opamp comparisons are more circuit specific,too.

peng




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