The peramp is a good addiction to my Rickenbacker copy , the bass now is much louder, with two distinctive pickup sounds. The bass pot is the winner, the middle and the trebles substantially do not change the tone much but they are still usable. The disappointment is that the preamp was sent by Thomann in the same box together with a metal kart ( a trolley to transport amps) just in a plastic bag without any protection so it arrived almost broken! The people making the packages should pay more attention, this is not acceptable and ruin the reputation of Thomann!