Running Benchmark AHB2 in bridged mode and 4 Ohm Speaker


Does running this amp in bridge mode mean each channel will see half the impedance i.e 2 Ohm each when connected to a 4 Ohm speaker.  If so will this cause a problem when the speaker dips to 3 or 2 ohms?. 

Anyone running Benchmark AHB2 in bridged mode with low impedance speakers?. 
geek101
jon_5912, When you bridge 33.3V into 10ohm speaker you'll get 66.6V and 6.66A making 400W.  Bridging quadruples power (since it doubles the voltage).


How much power the amp can actually put out will vary.  My point was just that bridging increases the watts an amp can deliver to a speaker and increasing watts means increasing current.  
increasing watts means increasing current.
Benchmark clearly states in it’s specs:
Not bridged
100w into 8ohms
190w into 4ohms =Clearly very close to doubling it’s watts, good current

Bridged:
380w into 8ohm
480w into 4ohms =Nowhere near doubling it’s watts, current diminishing.

Clearly the "not bridged" AHB2 is pushing current better because it’s closer to doubling the wattage into 4ohm, and therefore keeping the amp FR flat into varying speakers loads and not sounding like a tone control. Like the bridged would, regardless of how many more watts it has up it’s sleeve.

Cheers George
It is also possible that 480W limitation comes from power dissipation of the output or power supply (29A max current seems adequate) and is not relevant, unless one listens to continuous sine waves.  Music has very low average power while peaks might still reach close to 800W.