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needed a new project. decided to make my own TS 50 B bass preamp. since I love the the ultra low switch on Ampeg bass amps, I integrated the 50Hz and the 400Hz band of the TS 120 circuit. this required using a TL074, so I made the the balanced output of the TS 120 too. also including a regulated bipolar power supply. just plugged it in to the FX return of the Mesa Boogie 400 I went to pick up today. sounds awesome!!

Adam P wrote:That s rad! Assuming you did the board layout yourself?yes, I used a free EAGLE version to design the board. it's limited to 80*100 mm and it took me several tries to get all parts properly onto the board.