Source Audio BASS ZIO Analog Bass Preamp + DIExpertly engineered with a deep passion for monster bass tones, the ZIO Analog Bass Preamp+DI packs massive punch and flexibility in a compact and easy to dial in pedal. This ultra low noise, all analog tone shaping tool works equally well in front of your amplifier or as a preamp direct box via its balanced XLR output. High quality Burr Brown Op Amps and a simple yet powerful set of equalization, gain, and tone coloring controls deliver a rich and