Was thinking of picking up a Boston GT50 5ch amp.. this one
Boston Acoustics GT-50 5-channel car amplifier — 55 watts RMS x 4 + 250W x 1 at Crutchfield.com

I need to know if I can bridge the 4ch portion to a 2ch to power my components... I see no rating for bridged.. I see no markings on the amp to bridge.. does anyone know if you can??