Controls Level: Post EQ volume control. Can boost the signal up to 5x the input. Unity is around 10 O’Clock. Treble: Noon is flat, boost is clockwise from noon, cut is counter clockwise from noon. Bass: Noon is flat, boost is clockwise from noon, cut is counter clockwise from noon. Middle: Noon is flat, boost is clockwise from noon, cut is counter clockwise from noon. Measures 4.75″ x 2.50″ x. 2.25″″ with knobs Power The Tone Job should be powered by a standard 9-18 volt DC power supply intended for musical instruments with a negative center 2.1mm barrel. We strongly recommend a high quality power supply with isolated outputs and good filtering to avoid unwanted noise. Current draw is 10 mA.