I've enjoyed my ibanez btb505 quite a bit but always felt it lacked something with the onboard eq.. So today I added the new nathan east ne-1 preamp that is found in the newer yamaha bb's and it's a HUGE step up. Much cleaner and deeper tone and has MANY more useful tones with the addition of the mid toggle switch. I only had to add one small hole to add the switch and the bass looks really pimpy now. Just thought I'd share.