Sharkfin Unity Volume Low

[pryde]

Hello Gang,

Its been a while since I've been on the forum but life has been crazy..blah blah.

Anyway I have a Sharkfin I built some time ago and am going to sell it to a bass player here locally. I have done all the standard-issue troubleshooting and am certain the circuit operates as it should sans a mild volume decrease, mainly in just the filter side. A little searching reveals some others have had this issue but I didn't see any solutions as it could be the nature of the beast I suppose.

Any known tweaks to bump the volume up a bit? If not I might throw in a little AMZ boost or something inline before the output.

Thanks for any help and nice to be around again