Sure, if you want to give it a shot start off just changing out the 4 signal coupling caps. 2 caps are run in series for each channel to total 4 signal caps. Back when this amp was being modded everyone was using black gates but they are no longer available. You could consider Audio Note caps. Contact Chris at Parts Connextion he may be able to guide you with the best cap choice and new internal wire. Also Jeff at Sonicraft can help. Call PS Audio they will email you the schematics. Total cost can't cost more than $100 or so for caps and wire. Those stock signal caps are cheap junk so is stock monster wire. Google PS Audio HCA-2 Reference Audio Mods Audio Circle or anything with modding the PS Audio HCA 2, there is a lot of info out there. Another tweak to help smooth out hca2 is to remove the bolt holding down the tordal transformer, it is noticeable but subtle. if you do remove bolt just be careful when moving amp around. If you do this and like what you hear then move on to changing out power supply caps.