2x of these identical racks are available now for smaller stereo PA systems or DJ monitoring setups.
Quoted from the QSC GX Spec Sheet 04/05/11:
"The GX3 uses the latest evolution of the QSC Grounded Collector output system, for optimum cooling of the
critical power transistors. A true Class B biasing system combines maximum thermal efficiency with excellent audio
"The GX7 adds the road-proven PowerLight supply to the Class H output section, for more overall output
power and additional weight savings. The result is one of the highest power-to-weight ratios in the industry. A
low-noise variable-speed fan with rear-to-front airflow keeps amplifiers and
6x way processing is provided by a DCX2496 processor.
Comes supplied with XLR patch leads and a 4x gang extension block allowing for 'plug n play' functionality in a 6U slim profile flight case.