Running Benchmark AHB2 in bridged mode and 4 Ohm Speaker

To put it more simply for the nay sayers. 

If this "bridged" amp is ask to give 380w when the speaker is at 8ohm and can only give 480w when it dips to 4ohms it is clearly current sagging.

If that same amp "not bridged" can do 100w when the speaker is at 8ohms and can then give 190w when it dips to 4ohms it has almost no current sag.

I ask the nay sayers, which is going to remain flatter in frequency response driving those speakers????

Cheers George  

bridged will be as flat or flatter at every volume that unbridged is capable of.  Obviously.  Bridged can put out 100w into 8 ohms, 200 watts into 4 ohms and 400 watts into 2 ohms.  There will come some volume that is much louder than unbridged is capable of where bridged will start having problems keeping up.  That isn't relevant to most people, though.  Most people aren't running bridged because running stereo won't get loud enough.

George, Where did you find 480W/4ohm? Their website states 480W/6ohm.

Sorry your are correct it’s 6ohm as 4ohm they could not test, obviously current limited at 18amps and shut down, still not great 18amp shut down in bridged mode. And still 100w short of doubling into 6ohm anyway, still current sagging, should be around 570w not 470w

Benchmark specs given to Stereophile.:
" Output power, bridged-mono mode: 200W into 16 ohms (26dBW), 380W into 8 ohms (25.8dBW), 480W into 6 ohms (25dBW). Output current: 18 amps/channel, both channels driven, 18 amps shut-down threshold."

Cheers George

Power specified at 6ohm is 130W. Theoretical ideal power bridged at 6ohm should be 520W and is 480W (7.7% less). Also current was changed to 29A per channel. Perhaps 18A specification was for the early versions.