I am wondering if I need a return and bias..I purchased the amp used and had not played a smallbox before hand only research and videos everything I could find.I love the amp and sound best I've owned out of over a dozen.Won't mention names out of respect.I have a high frequency I seem to not be able to reduce.If I run the bass on 8 presence on 3 mids at 11 o'clock same for trebele.11 o'clock I have a high trebele overall sound.With a prs McCarty with a rosewood neck and board or switch to a Anderson.arrives classic maple neck,which has a single coil in the bridge however it is a dimarzio super distortion.Funny thing the prs with Humbucker(stock 2003)seems to have more of the treble or just as much as the Anderson.So that being said do I need a fresh set of power tubes? The gain is there the loop works great,the channel switch and bright switch function 100% a mild pop here and there with footswitch,so for the most part the pre amp seems to be perfect.All functions included.Any help would be great on this gents.My pedal experience so far has been " mxr micro, zvex box of rocks,wampler uphoria, keeley red dirt,bogner wessex.The micro amp from mxr has been same as the others other than having eq options from the other overdrive pedals.The gain structure becomes tighter but doesn't quite get a little more brutal as I was hoping for.I also have thoughts on power tubes maybe reserving some of these pedals attack as well..I have not opened they chassis yet..I have a multi meter and a probe so I should check the ma on each of the power tubes and see if they are matched or maybe drifted a little..is the correct ma around 32 or so? Does the turret board have test points for bias? If not I have the bias probe so I'm good.Just wanting any knowledge before hand.I guess I could have re-tubed and biased quicker than this email with my non existent typing slop..I have some genelax kt77s I want to try would the 32 ma be the same bias setting? If anyone knows the plate voltage that'd help too..many thanks!!!