the DON classics
Hairball Audio
DIYRE OLA5 Optical Compressor On Instruments - YouTube
Colour 500-Series Palette mkII – DIY Recording Equipment
Black Lion Audio Bluey 500 - 500-Series Modified "Blue Stripe" FET Lim
DIY JLM LA500 (LA-3A) Compressor/Limiter Clone. 500 Series. even better parts! | Reverb
DIY Recording Equipment OLA5 - 500-series optical Compressor - 2021 - Black - LA-3A / LA-4A style compressor | Reverb
Racking 500 Series/Lunchbox Preamps, Equalizers, Compressor Modules: How to Instructions. – FiveFish Audio Blog
Pynamic 500 Series Compressor Limiter Pye 4060 Module | eBay
Sound Skulptor: CP4500 Stereo Bus compressor for the '500' Lunchbox - Kit, Effects, CP4500
Alter 500 - IGS Audio
CAPI FC526 XFMR 500 Series Compressor Build to Order (Litz Transformer with Red Dot opamp) | Reverb UK
5 DIY audio kits to improve your recording - Threecircles Recording Studio
How to Build Your own Opto Compressor DIYRE OLA5 500 Series (LA2A, LA3A, LA4) - DIY Build Part 2 - YouTube
Choosing 500-series Modules
Sound Skulptor - Professional audio Kits
Choosing A 500-series Chassis
WesAudio DIONE Starlight - Limited Edition | Sweetwater
Racking 500 Series/Lunchbox Preamps, Equalizers, Compressor Modules: How to Instructions. – FiveFish Audio Blog
FET/500 Revision A
21 DIY Kit Sources for Pro Audio, Synth Modules & Instruments — Pro Audio Files
Sound Skulptor: CP554 Diode bridge compressor (mono) for the '500' Lunchbox - Kit, Effects, CP554
21 DIY Kit Sources for Pro Audio, Synth Modules & Instruments — Pro Audio Files
Building your own affordable vintage audio gear - Optoproductions
GB-1 compressor limiter 500 series module — David Evans Audio
JLM Audio Shop
