Sound issue with Mega Amp 1.2

[Xaranar]

Hey all

So I've had a spare Mega Amp version 1.2 kicking around for a while that I wanted to use, only now I have it installed, the left channel sounds a little bit more muffled compared to the right when it comes to certain sounds, it's most noticeable when it plays the sound effect for when you collect a ring in any Sonic game, as each ring you collect alternates between left and right channels, so it is very obvious that when the sound effect is played on the left it is much more muffled than on the right. I've tried replacing the TL074 op amp on the board, and that made no difference at all, so I'm guessing it's probably one of the passives, but the problem is, which one? There are so many!

Edit: I use the unfiltered mode if that helps, and switching to filtered mode on the affected channel does make a difference to the audio, so I don't think it's the filtering cap.

[Xaranar]

Never mind, fixed it! it was the 47pf unfiltered cap that was causing the problem, I replaced both of them with fresh caps and now they sound fine.