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DIY Stompboxes => Building your own stompbox => Topic started by: seanm on February 12, 2005, 08:26:14 PM

Title: DOD 250 bass mods
Post by: seanm on February 12, 2005, 08:26:14 PM
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?
Title: DOD 250 bass mods
Post by: j0shua on February 13, 2005, 02:46:43 AM
..... DOS 250 use LM741 , not a 4558
Title: DOD 250 bass mods
Post by: seanm on February 13, 2005, 02:35:31 PM
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.
Title: DOD 250 bass mods
Post by: seanm on February 13, 2005, 11:47:32 PM
Never mind. It looks like the problem is actually the bass  :evil: