I have an Audiopipe ap15001d, about a month old. $125 shipped w/ bass knob.
# 1ohm load stable
# overload protection
# overheat protection
# variable low pass electronic crossover
# variable subsonic filter.
# built-in variable phase shift.
# master/slave allows 2 amps to be linked for maximum power output.
# 55 mm(h) x 176mm(v) x 357mm(l).
# 2.2 inches(h) x 6.9 inches(w) x 14 inches(l).
# distortions:
# signal to noise ratio: 70db
# input level: 0.2-5v
# bass boost frequency: 30-80hz
# low pass filter: 40-180hz
# subsonic filter: 5-50hz
# frequency response: 8-180hz
# output power (rms): 600w@4o, 950w@2o, 1500w@1o
# Warranty: 1 Year Rickie's Discount Electronics Warranty