Hi all, I recently bought an Aphex 661 together with a bunch of gear that a sound system company was selling, presumably not working. It powered up when I picked it up but was told that it passed no audio.

Upon getting home, I opened it up that it was missing a bunch of opamps - no wonder it wouldn't pass sound! The audio company probably tried to repair it or used the opamps for another repair, then put the unit into storage and forgot about it.

Would anyone know what kind of opamps were in this unit? Specifically in nine locations - u1, u2, u3, u4, u6, u8, u10, u14, u18. From what I could see, the ones remaining are LF353's, with some of them either unlabeled or illegible. I tried to google for pictures of the PCBs and only found one that had them labeled as LF353's with unreadable ones in the spots where I had blanks.

Appreciate it if someone could share some info on this!