Technical specifications:
• Power supply - 9V battery or external 9V DC adapter
• Current consumption 2,2 mA
• Battery lifetime cca 450 hours
• Gain +12dB
• Footswitch: active / passive mode
• Controls:
• Volume
• Bass: +14dB/-4dB @55Hz
• Treble: +14dB/-12dB @6,5kHz

CleanTone bass preamp box

This box was designed for bass players who liked and wanted to use the BP-4, but there was no place for it in their instrument (Fender Precision Bass, Jazz Bass).