Running Benchmark AHB2 in bridged mode and 4 Ohm Speaker

I’ll leave the technical discussion to the boffins. The point I was trying to make, as I said before, was that, by all accounts, Benchmark seems actively to promote the use of their amp in bridged form. Why else would they send pairs of them out to reviewers? Surely this indicates--perhaps against the electronic engineering evidence--that they have confidence in their product performing well in bridged form under most circumstances.

BTW, am I right in noting that there has been little discussion here, until just now, of vertical or horizontal bi-amping, which are other possibilities, no?

clio09
You are correct, other than the recommendation by Roger, we haven’t really had any discussion on that. Vertical bi-amping is the way I roll these days and see no reason to go back, regardless of which pair of speakers I am using. I think using two Benchmark amps in that manner will yield very good results.

twoleftears
BTW, am I right in noting that there has been little discussion here, until just now, of vertical or horizontal bi-amping, which are other possibilities, no?

Speaker impedance always varies with frequency. Speaker impedance may be much lower than the rated "nominal" impedance at certain frequencies. The over-current fault detection circuits prevent potential damage that can be caused by driving very high signal levels into very low impedances. In STEREO mode, at full output, the current limit can be reached if the load impedance dips below about 1.3 Ohms. In MONO mode, at full output, the current limit can be reached if the load impedance dips below about 2.6 Ohms.