@Davedog , @audiokid @Boswell Dave... I just found out that this ADK preamp I'm working with works without any Input Transformer inserted... I was recording a bass track - I had been switching up XFO's earlier this morning and must not have put one in after the last switch out... The result is a very clean sound, can you tell me what's going on with this? I guess I was under the impression that an input transformer had to be inserted to pass signal - but I'm finding out that's not true. Of course, there does need to be an OPAmp... but I was listening to this bass track - playing a Hofner, which can be a bit tough to nail down tonally - but when I listened to playback, it was very "clean" and much more transparent... I figured I'd "ping" you because I know you have the AP2... But I'm more than happy to hear from anyone else, if they have an explanation as well..