Single channel 500 series PCB based on the classic Studer 169 EQOptional input transformer and DOA f..
Single channel PCB based on the classic 9k preamp in 500 series packageSweepable high pass, pad, pha..
PCB set for Jakob Erland's (Gyraf Audio) 2 channel tube, preamp designMic/line & DI inputs on bo..
Classic compression circuit on modern, pre-trimmed VCA, by Jakob Erland of Gyraf Audio"New" revision..
Two channels of Pultec style filtersMS encoder & Decoder built in1176 Signal amp for passiv..
Single channel PCB set for the classic filter design Tube gain-stage designed by Jakob Erland o..
Power Supply PCBRegulators can be programmed to needed voltageextra rail (leave out if not in use) w..
Single channel PCB for the W492 EQ clone, designed by Groupdiy.com member, AudioX High and low ..
more info coming..
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