SOLD Brand new in the box.. with instructions.. never mounted or taken out of anything.. The GLOCKENKLANG 2-band onboard preamp is active/passive switchable (at the volume push/pull), has a balance-pot with no volume dip in center-position, a treble-pot with +/- 18 dB@18 KHz in active mode, acting as classical highcut in passive mode and a bass-pot with +/- 14 dB@40 Hz. Battery-connection is 9 volts. Due to the high performance electronic, in flat position of the eq you can hear no difference between active and passive mode! It comes pre-wired with highflexible cables here's the link..http://www.glockenklang.de/en/products/products_bass.htm $130.00 shipped to you door.