“Studio Electronics ATC-1 Rack synth
Analog oscillators, amazing SE sound – this one is a serious bass monster.
Includes the Minimoog 24db lowpass filter & SEM 12db lowpass / band pass filter cartridges. Will also ship with user manual.
Condition is used. I recently bought a new membrane from Studio Electronics, so this unit’s front panel works perfectly, with none of the dodgy buttons often found on these synths. Some track rash around the unit – please see photos.” Click here to visit listing on eBay
“Studio Electronics ATC-1 Analogue Synth, With Minimoog Filter Cartridge. Condition is Used.”
” Used(Very Good) / perfect working condition
“Rare Studio Electronics ATC-1 synth in good condition. Works well, just some small peeling shown in pictures. All buttons and knobs function perfectly. Comes with 2 cartridges: Mini (modeled after Mini Moog) and 2600 (modeled after Arp 2600).” 
“Studio Electronics ATC-1 Analog Tone Chameleon w/ Minimoog filter cartridge. . Condition is Used. ” 
“Studio Electronics ATC-1 Tone Chameleon with ARP 2600 Cartridge – Excellent condition throughout and full working order.
“Studio Electronics ATC-1 Synth Module
“ATC-1 in very good condition, sounds excellent. Has all four modules built in, installed by Studio Electronics. Also has two switches installed by them, I forget what they do. Can also provide you with a killer Bome Midi Translator patch which controls all aspects via sysex.”