via this auction
"Blacet Research Audio Synth Modules, set of 6, FRAC Rack compatible, with 15v power supply.
Everything powers up and is working just fine, but see detailed description below.
FRAC rack modules are sized the same as Eurorack and API 500 series, but have 15v power requirement. The sale here includes a complete analog synth set, with the power supply. One of the six modules though (the chaos noise module) does not have a power supply base connector, so some electrical wiring is needed to power that one. The included power supply here has leads that plug directly into each of the other five modules, so those five are ready to "plug and play." Your on your own though as far as figuring out how to power up the Dark Star Chaos module.
Manuals for operating each of the six modules are included.
I believe you can mount these modules in a number of different types of racks. I used a 3-unit 19" wide audio rack, plus I had rails with mounts for the modules and rack ears to attach to that standard 19" audio rack. No mounting material is included with this sale, but it's easy enough to get that stuff. Check at Blacet.com if you have doubts.
From Blacet.com, you can get more info. Here is a general comment from their FAQ:
"ARE USED BLACET MODULES A GOOD BUY?" WE DON'T PRODUCE HUNDREDS OF ANY ONE MODULE, SO THE USED DEPARTMENT IS PRETTY SLIM. DON'T EXPECT MANY BARGAINS... THE EURO MODULES TEND TO USE +/-12V POWER; THE AMERICAN, +/-15V. OUR +/-15V AND POWER CONNECTOR SYSTEM IS FULLY COMPATIBLE WITH SYNTHESIS TECHNOLOGY (MOTM). THE NEW PAIA MODULES CAN BE RUN OFF OUR +/-15V SUPPLY BY USING A PAIA TO BLACET CABLE AND REMOVING OR JUMPERING THE PAIA MODULE POWER INPUT RESISTORS. SEE THE PAIA SITE FOR MORE INFO. OTHER MAKERS SUCH AS WIARD AND METALBOX ALSO USE OUR CONNECTOR."
