Sound Skulptor: MP512 Microphone preamplifier for the '500' Lunchbox - Kit, Preamplifiers, MP512
CAPI Preamp VP 312 DI – DIY Preamp im API 500 Format - YouTube
who has a built a diy 500 module? - Gearspace
DIY Tube Mic Preamp API 500 Format - Soundskulptor MP566 - YouTube
DIY Microphone Preamp Kits, Power Supply PSU Kits, OpAmp Test Jig, Electronic Load DIY Kits - FiveFish Audio
FiveFish Audio - 500 Series DIY Kits
How to Build your Own Preamp - Sound Skulptor MP573 (NEVE 1073) DIY Build PART 1 - YouTube
5 DIY audio kits to improve your recording - Threecircles Recording Studio
Primary Colours Bundle – DIY Recording Equipment
Bronze Complete DIY Kit
FiveFish Audio - DIY Mic Preamp Kits, 500 Series Kits, VPR Certified
DIYRE Colour
Sound Skulptor: MP566 Tube microphone preamplifier for the '500' Lunchbox - Kit, Preamplifiers, MP566
Gold Complete DIY Kit
N-SONIC N73PRE 500 Series 1073 Style Microphone Preamp – Astound Sound
FiveFish Audio - 500 Series DIY Kits
SK-1DI Mic Preamp Kit for 500 Series API Lunchbox, Rev.1.2 now available – FiveFish Audio Blog
FiveFish Audio - DIY Mic Preamp Kits, 500 Series Kits, VPR Certified
Retro Instruments 500Pre
Sound Skulptor MP573 ⚡ Buliding a Neve (style) Mic Pre - The Beat Shed
Fresh From the Bench: Hypex Nilai500DIY 500W Mono Power Amplifier Kit - A New DIY Benchmark | audioXpress
the DON classics
SK-1DI Mic Preamp + DI - DIY KIT
