Originally Posted by chrapladm
Bosso I believe is using the Fp9000 or 7000 not the 14k.
I've used the FP7000, FP9000, K12000 and FP14000, but that's irrelevant.
My point in popping in here it to reiterate that the amps are definitely 4 ohms bridged stable.
It's my opinion that 2 and 4 ohms stereo is a problem because of bus pumping. The protection circuits are not consistently up to the task when the amps are run in stereo and fed ULF at or near maximum power in stereo mode.
I run my systems typically with a +10dB L/T boost with a signal chain that's flat to 3 Hz playing extreme discs like WOTW. No one I'm aware of demands more from a subwoofer system.
I've run all of the amps in 4 ohms bridged, 120V-30A home run, to the extreme edge of their output capacity for 3-1/2 years with no problems.