i have a problem like that with my 81 and 60. when i play the 81 that is in the bridge is sounds great but when i switch to my 60 my volume increases alot it like if i had my amp on 5 o switch to the 60 and it sounds like its on 9 i dont know why but thats just one of the reasoms i like the pick up its super hot at first i thought it was the pick up height so i fived it and it sounds the same