Earthworks 1021 ZDT Series 1-Channel Zero Distortion Low Noise Mic Preamp
1021 ZDT 1-channel mic preamp (SN: 1-9131). After all it is a pure Class-A design with no ICs or electrolytic capacitors in the signal path. It is a premium mic preamp in all aspects. 48V Phantom power also remains active in its standby state.