@georgehifi --
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.
Some redundant info here, all of which is mentioned ad nauseam without either getting into specifics with regard to perceived impressions, nor putting the cons-info into perspective; what’s the relevance of claimed negative aspects for them to actually matter in-use, and would actual listening to bridged configurations ever be freed/independent from a preconceived, theory-laden approach?
This is my main contention with "hifi:" what’s headroom is generally looked down at as being "overkill," and further relegated to the arena of PA as something more crude and less refined. In this case I can only say my impressions of listening to bridged amp constellations, cons be damned, have been positive - indeed favorable compared to their non-bridged state. The overall impression is, by and large, that of a more effortless, (a)live, open and refined presentation - qualities I for the life of me can only associate with what is intrinsically better. If the matter was solely about comparing impressions and others disagreed with me, I’d rest my case respecting the other party’s opinion. What gets to me is the "look at the spec’d cons, man - they speak for themselves"-gist, added to the conjecture that more watts are essentially about catering to the PA-segment.
The only real negative of actual importance in my case would be that residual noise in bridged mode is amplified, and that matters with an active configuration of a 110dB sensitivity horn/driver combination. A lower gain setting would be necessitated here, but as is I’m perfectly happy with a 30 watts pure class A amplifier for this frequency region. What I would consider is buying a second Crown K2 for bridged mode with my horn subs (8 ohms) and/or EV bass section, but only because it would make what’s already very good even better - at any SPL.