YOUR BEST SOURCE FOR PRO AUDIO GEAR. NEW Aguilar OBP 3SK On Board Bass Guitar PreAmp Kit Pre Amp obp3sk. The OBP-3 is Aguilar's most flexible onboard preamp design, providing +/-18dB of cut and boost at 40Hz, +/- 16dB of cut and boost at either 400Hz or 800Hz and +/- 16dB of treble cut and boost at 6.5 kHz. The OBP-3 has multiple wiring options, and can be wired with either a mini-toggle or internal dip-switch for midrange frequency selection.
The OBP-3SK includes stacked Treble/Bass pot, Mid pot, and a black mini-toggle switch for Midrange frequency selection. Input impedance: 1 meg ohm. Output impedance: 100 ohm 9 or 18 volts operation. Additional 6dB with 18 volts. 019 into 10k ohm load.
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 0.59D.