As with many bridgeable amps, the 4BSST2 does not have a maximum power rating for a 4 ohm load when operated in bridged mode, it just has a rating for an 8 ohm load in that mode. Typically the reason for that is the fact that in bridged mode each channel of the amp will "see" a load impedance equal to the speaker impedance divided by two. So a 4 ohm load would be seen as 2 ohms. Some amps will not be able to handle that kind of load at all, and others will not sound as good when doing so as when driving 4 ohms in stereo mode. I suspect that the latter applies to the 4BSST2.
And I agree with ZD that the preponderance of credible anecdotal reports is that the majority of amplifiers will not sound as good in bridged mode as in stereo mode. Probably even when driving 8 ohm speakers, which would be seen as 4 ohm loads in bridged mode.
Regards,
-- Al
And I agree with ZD that the preponderance of credible anecdotal reports is that the majority of amplifiers will not sound as good in bridged mode as in stereo mode. Probably even when driving 8 ohm speakers, which would be seen as 4 ohm loads in bridged mode.
Regards,
-- Al