GBE series - traditional transformer based "linear" power supply (yes Bob, not really linear...

), 2 channel w/ tube and FET, 5 band fixed eq, really heavy duty 2 ohm operation with PowerFlex circuit, conventional 2 and 3 speace rack mount.
Shuttle Max - Similar to the GBE's in features, 4 band eq w/ 2 sweep mids, compact and lightweight. The 12.0 has dual 600 watt power amps to drive less than 4 ohm total loads and has a fully redundant back-up power supply for the preamp and DI.
Shuttle - Single channel, lightweight, 3 band eq w/ 1 sweep mid. The 6.0 and 9.0 are a tube gain stage and the 3.0 is the FET gain stage. Really lightweight.
You might want to look at the info on the website, maybe download a manual or two.