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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
geek101 OP
284 posts
 
I would like to thank John Siau a.k.a @gearbuilder for taking the time to provide detailed explanation and clarification. I appreciate the technical detail.

I have answers to my questions, apart from "damping factor" being halved I really do not see anything I am loosing by trying two AHB2 with each in bridged mono mode. My speakers can only dip to 3.8 Ohm minimum.

Sure two AHB2s may be overkill for my speakers but I will audition in both bridged and non-bridged mode now that I have all the information. Thanks to everyone.
georgehifi's avatar
georgehifi
10,312 posts
 
My speakers can only dip to 3.8 Ohm minimum.
That means the amp/s in bridged mode will see a load of 1.9ohms, not good for the bridged, but fine for a single stereo amp.

Sure two AHB2s may be overkill for my speakers
Yes as I told you before, with a single stereo you will not only get better sound, but be able to reach with your speakers in room at 3mts, 110db!!!! Enough to blow your eardrums out.

Cheers George 
geek101 OP
284 posts
 
@georgehifi thanks. Consider this thread closed.
georgehifi's avatar
georgehifi
10,312 posts
 
tobes
Really?
Lets look at that.
Show me where it states about and using the words "distortion being the same" in bridged mode into a 4ohm speaker, which means it’s seeing a 2ohm load?
I doesn’t, and it’s a furphy!
https://www.google.com.au/search?q=furphy&rlz=1C1CHZL_enAU820AU820&oq=furphy&aqs=chrome....

But like Roger Modjeski "ramtubes" said, it’s a great spiel to be able to sell two amps with. Even though the user will go backwards in sound quality if he didn't need the extra watts.

Cheers George
tobes's avatar
tobes
436 posts
 
@georgehifi said:
Show me where it states about and using the words "distortion being the same" in bridged mode into a 4ohm speaker, which means it’s seeing a 2ohm load? 
I doesn’t, and it’s a furphy! 
George, I don't know why I am responding to this, you clearly have trouble with reading comprehension.

@gearbuilder said:
The THD into 2 Ohms, 4 Ohms, 8 Ohms and no load are virtually identical. 
and for the 3rd time:

Bottom line, the AHB2 is well suited for bridged mono operation into 4-Ohm nominal impedances and the performance is virtually identical to stereo mode except that the power is nearly 4 X higher. Dips in the speaker impedance curve are not a problem and the AHB2 drives these cleanly.
George, I don't intend to reply further to this thread. You only seem interested in carrying on with unsubstantiated argument. 
Try to relax and enjoy the rest of your day - I'm kicking back listening to my bridged mono AHB2's :)
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