Genz Benz Streamliner EQ Mod Tech Question

Hey, I use a Streamliner 900 (usually 2x15s) which is great but the midrange frequency presets arent my favorite. Could I (A) change the frequency points or (B) make it sweep like semi-parametric? Can anyone guesstimate how complicated / expensive that would be as I couldnt do it myself. I could just stick with an EQ through the effects loop but its one more thing to carry. Thanks. Steve

 

Thanks for the advice!! I love the amp and havent tried a micro I like as much or that sounds as much like an all tube amp. Its a sub genre thing, the mid bias on the SL seems more SVT modern rock and I do more 70s rock n roll ala Stranglers, Jam, Wetton (KC era) usually adding 800 to 1200 hz. Also no one carries a wide range of micros in L.A... music capitol. Any suggestions which micro covers that sweet mean grit and growl with class? I thought maybe changing the value on a couple of caps or resistors or sumpn would change the freq bias and might not be a big job. But if it is, then the EQ pedal in the loop is the answer.