Back in the day, I had an Orion 280Gx and 2150GX they were both rock sold
amps. Even now days I would still take 2250SX or 2100HCCA, even more so a
500GS over most of the new stuff out there today. Orion also had a purple NT
line which I like very much. Back in the day those amps were real pro gear
without any crossovers, fuses, speaker protection and polarity protection just
to name some.

If I had to pick out the best amplifier that was ever made by the
ADST family of companies, it would be the GX line from Orion by far.
Ultra simplistic and fuctionallity that some of you may not realize.
The top dog GX line, the 2350gx and 4100gx, are actually 2
amplifiers in 1 chassis. The 2350gx actually has the 400BDG module
right inside. In this case its called the Input BD, which takes a
single input channel (R+L) and splits into 2 channels, and inverting
(180 degree phase) 1 side to each of the two amplifiers in the
chassis.