My firsth thought is your eq is jacked up! I would try more calibrations
I have deinitely "tweaked" the 31 band a bit but 3.5dB at most
Are you coded to base stereo still?
FS:Sub Amp - works w/ Technic harness! MRD-M300 - cheap
DON'T BUY FROM RAF555!!!! Promised fix! - strung me along til Paypal dispute period expired!