This is one of the best EQ pedal for Bass Guitar. It has two EQs in one. Preset EQ and 7 band EQ. Runs on Two 9v batteries or 18v DC adaptor.

PRE SHAPE Next to the INPUT GAIN control is the switch for selecting PRE SHAPE 1 or 2. The selected PRE SHAPE sound is switched in and outwith the footswitch below this marked PRE SHAPE. The PRE SHAPE facility is like a preset graphic equalizer built into the SM7EQ that you can switch in or out to modify the sound of the bass.PRE SHAPE 1 is the classic TRACE ELLIOT EQ as found on Series 6 units the SMX and the SM range of amplifiers, it adds a boost at both the low end (50Hz) and the high end (2 to 5kHz) of the frequency spectrum as well as a cut at mid frequencies (400Hz).PRE SHAPE 2 is more rock orientated equalization providing a wider bandwidth boost at low frequencies, less of a mid cut and as light boost at higher frequencies. This is a less extreme EQ than PRE SHAPE 1.Both these pre shaped sounds will add extra punch to your sound and may be used with or without the GRAPHIC EQUALIZATION section being switched in.
 
Includes Power Supply & Box