Aguilar OBP-3TK/PP Onboard Preamp<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Includes separate Treble， Mid， and Bass pots. Mid pot is push/pull for Midrange frequency selection.</li><li>plus/minus 18dB bass at 40Hz</li><li>plus/minus 16 db of cut and boost at either 400Hz or 800 Hz</li><li>plus/minus 16 dB @ 6.5KHz</li><li>Battery life: 324 hours</li></ul></div><img src="http://ecx.images-amazon.com/images/I/318oWXU1RKL.jpg" noproxy>