2128 “Helios” Mic Preamp
 
The 2128 is the mic preamp circuit from the 0011 in a 500 series package. It features the same quality preamp with 70 db of gain, 20 db pad, phase control, 48V phantom power and selectable high pass filter. Also added is a Cinemag input transformer, output amp section with transformer out and output fader.