I don't know how many of you have tried this yet, but throwing an EQ in the loop of your Stiletto ACE will solve a lot of headaches and frustrations in terms of the Stiletto's high frequency issues. Besides turning down the Presence control on the amps EQ, throwing a EQ in the loop will yield great results. After many pedal purchases over the past year, both distortion and overdrive, the Empress ParaEQ ($250) has made all of the channels on my ACE very usable. Much more bottom end than ever before. Just throwing it out there. Check it out if you are getting frustrated with this amp.....oh also, definately do a speaker swap. I bought a Scumback M75 LHDC speaker for my 1x12. That will immediately yield some pretty nice results as well.