I have one Art Cleanbox in excellent condition and 3 Rolls MB15's and 1 MB15B also in great condition. All work perfectly. They are used to level match your AVR pre-outs to a pro amp if your receivers pre-outs don't put out enough voltage. I am asking $40 each shipped in the USA. PayPal or local pick with cash in central Mass. Here are links to the Rolls. The Cleanbox does the same thing. http://www.google.com/aclk?sa=l&ai=Cr5M7F5NSVL77MOaKsAfXr4HIC8r30OIFgtOk9bwB-sa3rL0CCAQQASgFUPLrgr8EYMmWhImEpOwPoAGd5Mj3A8gBB6oEJ0_QiymilwJmWpZt2pfOwmb8eqo9_fwhjB_8qTHiZ_5N81sbj6apDsAFBaAGJoAHpP6FCZAHA6gHpr4b4BK89_OClMTahhg&sig=AOD64_31N92U_NCpSWCDi0TgYhxglMi64Q&ctype=5&rct=j&q=&ved=0CCAQwg8&adurl=http://www.bhphotovideo.com/bnh/controller/home?O=&A=details&Q=&sku=217366&is=REG&BI=225&kw=ROMB15B https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0CEcQFjAB&url=http://www.rolls.com/product.php?pid=MB15&ei=F5NSVIeBLfOLsQTFloHQCQ&usg=AFQjCNHZJIp4sxoEhNXMOA50PYgTTQmbXA
