The Altitude series amplifiers are SA-WEEEET. Great sound, powerful, reliable, and very affordable. Also, if they are installed by an authorized AudioControl dealer (Thats us!) they have a 3 year warranty!
The A1500.1 is a monoblock amp, rated at 1500 watts x 4 @ 1.330ohms. However their power ratings are very conservative, they do much more.