I am trying to get better bass response from a DOD 250 reissue. I removed the 2 diodes and the associated cap to get a basic preamp. This makes testing the response easier since the distortion is not in the way.
If I put the gain at 12:00 and the level at 12:00 I will get distortion from the E string but the rest are fine. So the 4558 seems to be distorting at lower frequencies.
Any hints on what to tweak to fix this?
..... DOS 250 use LM741 , not a 4558
Quote from: j0shua..... DOS 250 use LM741 , not a 4558
The new reissue yellow box use a KA4558. There are acutally quite a few small component changes in the reissue.
Never mind. It looks like the problem is actually the bass :evil: