Comparing SC25 to 2520 Op-Amps. SC25 does the trick!

[Category 5]

This is a continuation of my posts from the A12 gain thread. I did some more accurate frequency tests and found the SC25 to be a near exact clone of the 2520 except for THD.

Well...very different things are happening when the preamps are loaded wih a 150ohm input instead of just patching the high impedance sound card output into the mic pre.

the 2520 and SC25 are like twins in frequency response. They only differ in THD, which is quite similar to say the least. Have a look!

Full Spectrum

http://www.pbase.com/sbushman/image/359 ... iginal.jpg

Highs

http://www.pbase.com/sbushman/image/359 ... iginal.jpg

Lows

http://www.pbase.com/sbushman/image/359 ... iginal.jpg

And THD

http://www.pbase.com/sbushman/image/359 ... iginal.jpg

These have been corrected for my soundcard. The second channel was the soundcard patched back into itself, and after correction I get a straight line. Also, keep in mind that the scale is WAY zoomed in to show the differences. Frequency response wise I think there is no appreciable difference anymore. Of course, both 2520s and both SC25 are identical in pairs, so the small difference IS real.

If anyone want I can send the RightMark files and you can zoom in and out of all the graphs on your own.

Shane