sda2mike wrote: »
well, as i posted, it's back:cheesygrin: i had some lengthy sessions friday and saturday..it's a huge improvement! like going from a redbook cd to a well-done re-master! it is not sutble! i was pushing some serious current into my 2btl's and i think my ears were the weak link;) the bass now has incredible slam and depth!that's on all recordings...not just when it feels like showing up, like before;) the drum sounds are great! snares sound like snares....you can almost se the wires in the snare drum...pianoes sound better than ever...and the SDA???? holy schnikeys! active alive and all over!! this is a must do upgrade! thanks to george daniel for this thread and for doing the surgery! i couldn't have done it! the parts he sent back are TINY:)
agfrost wrote: »
I promised some months ago I'd add a shot of my power supply board once I got the Nichicon FGs soldered in, so I'll take the opportunity to do so now...
kind wrote: »
I also biased OpAmps into class A.
Just soldered 3,3 kOhm resistor to 1 and 4 leg of socket, and another 3.3 kOhm resistor to 7 and 4 leg.
Seems like it made OpAmps sound more tight.
I don't have a schem handy so not sure of the value.3.3 k seems low and may be pulling excessive current through the opamp's output stage.
The OPA1602 also looks like an interesting option.It's an SMD part so an adapter would be required.