” ATC-1 analog monosynth with 303 (Roland) & SEM (Oberheim) filter cartridges, manual, power cord
lively warm sound , lots of character & presence, rich leads, punchy & deep low end.
can be very smooth or aggressive, noticeably different/better than any analog VST/VA emulation .
this is a really ‘musical’ synth imo, suitable for club music, ambient, college rock & more. there are many many praises online for this synthesizer.
everything working as it should, theres a few minor scuffs on the sides from rack installation & removal.
marvelous when paired with a midi controller like the BCR 2000.” Click here to visit listing on eBay
“I bought this about 10 years ago from the original owner and it has spent its time since in my personal home studio. I think I have the manual but I’ll have to dig through my box of manuals to verify.” 
“Studion Electronics SE -1.
“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
“This is an awesome rackmount, analog synth. I purchased it from a backline rental company and have only used it a couple of times in my smoke-free studio. It’s in near mint condition, works flawlessly.”
“Studio Electronics SE-1. Condition is Used.”
“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.”
“Studio Electronics Omega 8.
” Here we have a Studio Electronics SE-1 Analog synth module in good working condition. I bought this new and have taken good care of it.”
“Excellent working condition with original packaging.” 
” Unit is untested, sold AS-IS. Includes eurorack power cable.” 
“If you are a studio guy or a keyboard guy, you know this brand and these units!
“MISSING ONE KNOB PLEASE LOOK AT PHOTO BUT IT’S COMPLETELY FUNCTIONAL” 
“Great condition”
“This unit is in good condition and functioning. Comes as you see it with the power cable.”
“Huge fat mono analog sound. They do not make them anymore all 4 filters in this thing. This sounds amazing due to things that need to get paid i am selling this.”
“Overall, the synth is in excellent working condition. The front panel is very clean with hardly a blemish to be seen. The top has some minor marking, the sides and rear are also clean with only minor marks.”