I purchased an SSX 750.1 amplifier from siacarman and a SSX 75.4 4 channel amp from stopdrpnro to replace my RF T400-4 and T1500-1BD. When I received them in the mail, they came in these huge white boxes and they are heavy and very very solid. These amps are first of all built like army tanks. They are solid from top to bottom. The controls are flawless. Everything on amp is high quality. The bass hits just as hard. I underestimated the power of the SSX 750.1. I have to keep turning down the gain on 750.1. The sound is clear. The look of the amps are old school. I learned that watts are watts regardless of whether you use Sundown Audio, RF, Treo, JL Audio, etc. All that matters is the quality of the product, amp meeting specifications, look of the amp and whether the amp is taken care of. This will end my switching because Treo Engineering is excellent. Zapco, Tru, RF, JL Audio, RD Audio, Sundown Audio, MTX, MMATS are all great companies and make great amps. All in all it has been a great ride and I losiacarman ok forward to enjoying my Treo amps for years to come.
