I've have my chinese made Palatino upright for about 2 years now. I don't play amplified very often but when I do I get a ton of percussive "clunk" out of my amp. I've done all I can to EQ it out but its always there. I'm using an underwood pickup and I've never changed the strings on the bass. Any thoughts as to where this "clunk" may be occuring? Strings? Pickup?...poor technique? You won't hurt my feelings if its the latter, I'm still saving up cash for a teacher.