Egnater ie4 preamp schematic. PLEASE HELP!

mikpasos

New member
Hello everybody, I'm new to this forum. Hope that someone can help me. I scored a second hand ie4 preamp (Pre Rocktron, silver faceplate). It works fine, but I opened the chassis to see it's guts. As I suspected, It had been repaired. Comparing with pics in internet, there are many changed components, some added and some absent (resistors, caps and connectors) and the back input is disconnected. The preamp works and sounds good but now I'm wondering if I' missing something with all that moddified circuit (I expected a little more gain in all channels, and channel 2 sounds a kind of badly saturated in the bass, bright switch in channel one makes no big difference...), so I'm gonna try to revert it to original stock specs. The problem is I can't find the PRE ROCKTRON schematic anywere, so please guys, anyone have a PDF o JPG of the original Egnater schematic ? Thank you very much for your attention, nice forum and a lot of knoweledge and kind people here. Regards.
 
Some Pics :D
 

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