The OBP-2 was designed to give bassists fat tone while being small enought fit into tight control cavities.  Wire this preamp with one 9 volt battery and it will fit into just about any instrument.  With +/-18dB of boost and cut at 40Hz and +/-16dB of treble boost and cut at 6.5 kHz you can emphasize just the right frequencies to make your bass sound great in any mix.

Specs

Bass control: plus/minus 18 dB @ 40 Hz.

Treble control: plus/minus 16 dB @ 6.5 KHz.

Input impedance: 1 meg ohm

Output impedance: 100 ohm 9 or 18 volts operation. Additional 6dB with 18 volts.

Distortion: .019 into 10k ohm load

Noise: -95 dBm unweighted.

Battery life: 324 hours

Wire lead length: 6.50 inches

Low noise discrete FET input stage, center detent 50 K linear pots,with a dual concentric pot available.

Dimensions: 0.98"W x 0.98"L x 0.59"D
 

OBP-2TK: Includes separate Treble and Bass pots.  (The OBP-2TK is a special order item and usually ships in 2-4 weeks.)

OBP-2SK: Includes stacked Treble/Bass pot.