Hi Someone told me that i should tried PCC88 in the M.F. X10-D instead ECC85. I'd like to know some opinions before i try this. The first tubes that came with this device were ECC88,but when i changed to ECC85 from Siemens the sound become much better with more detail and the bass more tight and firm. Do you think that i give a try with the PCC's88 ?.. :scratch2: Have fun .