i just purchased amp i can not find info on.please


front says absystems,theab logo is blue.then says advanced technology desighn series model 422. the amp has a front control on front panel. which controls speaker load impedance..5 to infinite.labeled in, out chan 1 chan2.info anyone?
energizer
422A (ATD Series)
Two channel
325w @ 8 Ω
590w @ 4 Ω
775w @ 2 Ω
Precision level control
Balanced inputs
Convection cooled or fan assist
3 Rack unit

www.abamps.com
Hi
Anyone can help with a manual or schematics for this amp?
Thanks much!
Harel
harel.shachar@gmail.com