I can tell you I am not impressed with it. I have one and I liked the Cab-22 amplifier better. Yeah the SIA line serves a purpose and what not. They do what they claim RMS wise, lots of power in a small setup and Sundown will stand behind their products like always. But I would rather have that half-bridge vs the full bridge of the SIA line. Talked to a couple people outside of here locally that have them from a Sundown dealer in GB they said same things that they were going back to a half-bridge setup. Hence why I am selling mine and going with the Cab-45 instead hopefully later this summer.