1-channel Transformer-coupled Microphone Preamplifier 
2-band Equalizer 
Analogue VU meter 
Transformer balanced output 
Switched rotary controls 
48v phantom power 
Switchable polarity 
Hi-Z direct inject input 
80Hz switchable HPF 
Gold-plated PCB internals 
Powered by vintage OPA1731 Op-amp 
Compatible with 500 series racks