Here's how new and innovative these amps really are. Not to label them all the same but they are somewhat nothing new. "Audio Engineering Society - Chicago Section - Meeting Review ... ... several observations he has made concerning amplifier design over the years. ... of the first class-D amplifier in 1958 and the first class-H in 1967" These designs are class H. Basically ab amp with a modulated power supply fed by the input. Not exactly rocket science. These big debates about design theft is really splitting hairs. There is also yet another design in Europe that is a mirror of the RMX 2450 spec and it's not Behringer. As the specs are identical in almost all aspects I'm starting to wonder if part of the designs are derived from the power stage semiconductor manufacturers and therfore follow an almost cookie cutter output. The real "design" part on QSC's behalf is the quality about the way they build in and use supportive circuits such as output short protection etc. maybe..... This design does apear to be somewhat "common". Take a look for yourself and compare to the RMX or EP Behringer. http://126.96.36.199/en/product/l-800_1400_1800_2400.html I'd be interested to know if the power transistors QSC are using in the output stage just happen to be Fairchild & Toshiba. The same power stage Behringer are using. I wonder if Fairchild or Toshiba provide suggested schematics for class H operation of power audio amplifiers for these semiconductor products. Of course the application of this suggestive circuit may provide similar power output specs but depending on construction, parts and implementation could give very different qualities. It's common practice amongst computer manufacturing to do this.