This is a vintage Allison Labs passive filter / equalizer with custom mods. It has UTC input and output transformers and XLR connectors added as well.
Archive for the Modded Category
Modded with tags 2ABR, Allison, EQ, equalizer, filter, inductor, passive, transformer, vintage on October 15, 2012 by AnalogAudioRepair
Modded, Racked Modules with tags discrete transistor, EQ, equalizer, inductor, microphone, modded, PM1000, preamp, racked, transformer, vintage, Yamaha on September 19, 2012 by AnalogAudioRepair
Yamaha PM1000 discrete transistor console strips cut down, recapped, modded, and racked as mic pres with EQ.