Aguilar OBP2TKSET 2-band Boost/Cut On Board Bass PreampActive electronics and preamps give you bands of EQ to shape your bass's tone. Using these active EQs lets you find your signature sound directly from your bass. Aguilar sets the standard for aftermarket onboard preamps. The Aguilar OBP 2 features a low noise discrete FET input stage, runs at 9V or 18V, and gives you the benefits of active electronics. You get two bands with 18dB boost cut at 40Hz and 16dB of boost cut at 6. 5kHz, giving you the fat