Single-Channel 500-Series Mic Preamp. (bel·la [ pronounced: bell-ah ] – adjective) Etymology: Latin; Definition: Beautiful. Features: First-ever remote controllable 500-series mic preamp Original amplifier design (NOT another vintage clone!) Inout/Output transformer coupled for the best possible noise rejection in even the most demanding situations Relay stepped gain from 18 to 60dB in 1dB increments, Switchable: [...]