- AML ez2254 Compressor/Limiter
- AML ezP-1A Tube Equalizer
- Amp Maker Double Six Amplifier
- CAPI gar918 Discrete Opamp
- Charles R. Thompson Budget Studio Monitor Isolation Stands
- ClassicAPI FC526 FET Peak Limiter
- DIRECT TUBE PREAMP DTP-01 BY General Audio Research
- DIYAC RM-5 Ribbon Microphone
- DIYRE Colour 500-Series Palette
- DIYRE L2P Passive Line Attenuator
- DIYRE SB2 Passive Summing Mixer
- Don Classics 250EQ
- Drip Electronics Sta-Level Micro
- ESP Mains Power Sequencer
- Gafro Ribbon Microphone
- GKL522 Discrete Opamp
- GLS Audio ES-58 Mod
- Hairball Audio DIY-990 Opamp
- Heiserman Audio HK87, HK47, HK67, HK12 Capsules
- ioudio Transformers
- JLM25HV/JLM25HVFET Discrete Opamp
- Livid Builder Series
- MelChiOr 1337 and MeJLHior 1337 Discrete Opamps
- Michael Joly Dual Ribbon Mod
- Microphone Parts S Series Condenser Microphone
- Oktava MK-012 Mod
- Oktava MK-219/319 Mod
- RackNeve 1073 Mic Preamp
- Red Circuits Mini Portable Guitar Amplifier
- Ruffrecords EzTubeMixer
- Shure M67 Mixer Mods
- Sound Skulptor 501 Chassis
- Sound Skulptor MP566 Tube Preamp
- Sparkos Labs DIP8 Discrete Opamp
- TapeOp Omni Microphone
- TB Audio TB2S Discrete Opamp
- Zayance MKPSU PCB
- Zayance PCB Sta-Level
- Zeppelin Design Labs Cortado Balanced Piezo Contact Microphone
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