Source Audio ZIO Analog Front End + BoostMaker: Source Audio Model: True Spring Reverb Condition: New Description: The goal in creating the ZIO Analog Front End + Boost was simple yet ambitious: Make Everything Sound Better! ZIO is an all analog preamp boost pedal that includes a choice of four distinct preamp circuits, each with up to +20dB of additional output boost. ZIO is Source Audios first all analog effects pedal and designed in collaboration with Christopher Venter, the owner and