Aguilar OBP-3TK Onboard Bass Preamp

Aguilar OBP-3TK Onboard Bass Preamp, On-board Bass Preamp, The most versatile Aguilar bass preamp, +/- 18 db for Bass (40 Hz), +/- 16 dB for thomann Mid (400 or 800 Hz), +/- 16 dB for Treble (6.5 KHz)., Can be operated with one or two 9V batteries@+*Included in delivery:*@+@+, Preamp, 3 Potentiometers for bass, mid and treble, Mini-switches for the selection of the central frequency ...