A REAL SWEAT SOUNDING AMP ALSO VERY POWERFUL .HAS EXCELLENT SEPARATION VERY DEEP BASE REALLY REPRODUCES MUSIC TO THE MAX.THE ONLY THING I HAVE THATS BETTER IS A USED GOLDMUND MIM.BUT NEW THAT WAS OVER 5 G'S. I HAVE THE CHAMPAINE COLORED SR-18U VERY LIMITED EDITION. BUT IM SURE THE BLACK ONE SOUNDS THE SAME.GRAB THESE UNDER 600 THE BEST BANG YOU WILL GET FOR YOUR AMP BUCKS.