I have an Orion HCCA 275G4 Amp, it's an old school Orion and its VERY good, I got it off a friend, he told me it didn't turn on, but hes used it before so i think he just wired it up wrong, me and a friend (who is very good with audio) looked at the amp and he said everything inside looked fine so it may or may not work. Either way it is a VERY rare amp and it's about $900 new, it's also about 2 feet long, I'm looking to trade it for just a 12" Alpine Type R DVC 4ohm, or I will sell it for just $150 obo. Really just want to get rid of it so I can finish my current system. I'm sure if you're big into audio it could be easily fixed (if it doesn't work, havn't tested). You can Call/Text me at 321-652-2354. I'm located in West Melbourne/Palm Bay.