- APP Studio Ing. I/O Board
- APP Studio Ing. MA1 500-series Preamp Kit
- Beesneez Lulu FET Condenser Microphone Kit
- Cathedral Pipes “Dale” M7 capsule
- ClassicAPI BB2521 Hybrid Opamp
- ClassicAPI Discrete Voltage Follower
- D-269C Vintage Microphone PCB Kit
- D-49B/C Vintage Microphone PCB Kit
- DBD CEQ Equalizer
- dBDawg PreQ 500-series Preamp/EQ Kit
- DIY-Racked DR-2402 API Summing Amplifier
- DIY-Tubes.com AD797 Mic Preamp Kit
- DIY-Tubes.com THAT4301 VCA Compressor/Limiter
- DIY-Tubes.com Tube Mic Preamp PSU kit
- Don Classics U76A Compressor
- ESP Project 50 Microphone Circuit Test Oscillator
- ESP Project 96 – 48V Phantom Power Supply
- Expat Audio Mic Pre Frontend
- Expat Audio Uber Power Supply
- FiveFish OpAmp Test Jig
- GEO-Fex Spyder Pedal Power Supply
- GEO-Fex Transformer Winding Short Tester
- Hairball Audio Elements Mic Preamp Series
- Hairball Audio FET Compressor (Rev. A/D) Complete Kits
- Hakanai Stereotype Mk II Summing Mixer
- JLM Audio Kraftwerk Power Supply
- MAKE Optical Tremolo Box
- Mic & Mod Apex 460 Upgrade Kit
- Mic & Mod U87 / C12 Microphone Kits
- Michael Joly Engineering ES-58 Mic Mod
- Microphone Parts Apex 460 “Fox” Mod Kit
- Mnats FET/500 Compressor/Limiter Kits
- MojoTone British 100 Watt-Style Head
- Mojotone Discrete Hi-Voltage Series Effects Loop
- Mojotone LVS-1 Power Supply
- MojoTone MBA Amp Kit
- Open Plan Recording C12 / 251 Clone Mods
- P2P LA-2A Chassis
- PAiA 6740K Hot Springs Reverb
- PAiA 9605K Headphone Buffer Amp Kit
- PAiA K83 Universal Bipolar Power Supply
- PAiA K89 Stereo LED VU Meter Kit
- PCB Grinder “Head Grinder” Headphone Amp
- PCB Grinder “Pre Grinder” Preamp
- PCB Grinder CTQ EQ
- ProHarmonic/AudioTechnology Passive Monitor Controller
- Quad 8 444 Mastering/Mid-Side EQ
- Ruff Records EzTubeMixer
- Ruff Records Poor Man’s EQP1A
- Ruffrecords Passive Summing PCB
- RuffRecords REDD EQ
- Serpent Audio Send ‘N Blend Mix Controller
- SonicImageryLabs 995FET Discrete Opamp
- Sound Skulptor CP5176 Compressor
- Sound Skulptor MC624 Monitor Controller
- Sound Skulptor MP5.99 Preamp
- Studio 939 C12 Condenser Mic
- Sureshot Studio / UREI MOD-One Discrete Opamp
- TB Audio TBFX 500-series interface
- TBDD-500 Stereo Chorus
- The Human Comparator “TTSH” Analog Synthesizer
- Total Audio Control EQ ONE
- Total Audio Control MICPRE ONE Preamp
- TSKGuy U67/U87 capsules
- Van Daal Electronics 500/51x 11-space Rack
- Whistle Rock Audio ML918 Discrete Opamp
- Whistle Rock Audio USB-DAC
- Zayance Stepped Pot PCB
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