These Audix console modules are type 35208. They were talkback master modules, and basically are a transformer balanced Microphone Preamp with gain control and an unbalanced output. We have 16 of them. They were meant to be used with a balanced output amplifier . These contain a Sowter 4335 Input Transformer and discrete amplifiers. They appear to be in good condition, but may need attention. Please see our other various Audix listings.