Running Benchmark AHB2 in bridged mode and 4 Ohm Speaker

You believe what you want, and I'll believe what I know for the OP's speakers, and that's what this thread is all about.

In general Bridged Amps
Pros=
More watts.

Cons=
Worse damping factor
Higher output impedance (has relevance to damping factor)
Lower stability (especially into low impedance's)
Current ability is reduced  (especially into low impedance's)
Higher distortion.

Cheers George 
 
 

I would expect it to be higher. If the rails are 60 volts then the peak volts should approach 120, say 100 Volts with losses, but the current won't support that as 25 amps are needed.

The manual states:
Output voltage: >80Vpp into any load
Output current: 29A peak into 1 ohm, both channels driven

 BTW 18 amps is not an impressive amount of current for modern amp of that size. Should be more like 40 amps. 

I presume you mean current compared to power output not physical size?
The AHB2 is very small and lightweight. IMO the power/current output  - not to mention almost non-existent distortion, super high SNR, efficiency, cool running and (most importantly) resulting purity of sound - are very impressive.
Other than bragging rights, I doubt 40A of current has any advantage in driving practical loudspeaker loads.

With all due respect George, it's not a matter of believing what I want.
Implying higher distortion in bridged mode for the AHB2 is incorrect.
This has been independently verified.
Not sure why you keep insisting on this?

https://www.stereophile.com/content/benchmark-media-systems-ahb2-power-amplifier-measurements

And of course all topologies of amps behave identically when bridged, and no amps are ever specifically designed to be bridged.

Is this sarcasm or what you believe? Can we at least get a little more real, we might just figure out something.

I presume you mean current compared to power output not physical size?
The AHB2 is very small and lightweight. IMO the power/current output - not to mention almost non-existent distortion, super high SNR, efficiency, cool running and (most importantly) resulting purity of sound - are very impressive.
Other than bragging rights, I doubt 40A of current has any advantage in driving practical loudspeaker loads.

I meant of that size power wise, not physically. Now we have a report of 29 amps. This is like the stock market. Or are we just playing poker and raising?

I will bet you that this amp bridged into a 4 ohm load played at 1/3 average power will probably overheat. Where is John Atkinson when we need him? :) 

40 amps of current is needed to produce 40 volts peak (100 watts RMS) across a 1 ohm dip in impedance. If this impedance is reactive the amplifier will be really unhappy.

ps. I did read the review by JA. It's worth a look but doesnt answer all the questions. It's clear to me what the OP should do.  One amp or get busy and truly BiAmp. When are we going to get out of the sandbox?