bridging an amp

He's going to go backward in sound quality if he bridges if he has a decent system, just for the sake of going louder.

Cheers George

pros: increased measured power
cons: decreased perceived sound quality

The vast majority of what you hear the vast majority of the time is the first watt. Unless you are some headbanger driving everything to the max all the time, in which case you don't really care- or its silly to say you care- about sound quality. Doubling power only gives a small 3dB increase in volume. Doubling power only has any benefit at all in that last little occasional 3dB (or whatever it is) bit, which is hardly ever. 

Therefore as a matter of simple logic it is clear bridging an amp can only decrease the quality of sound you get all the time, and maybe not even improve the sound quality of the last little bit of high volume. Because who at that point is carefully listening anyway? 

Weigh the pros and cons. Its a pretty lopsided comparison. And yes people really are capable of pushing and promoting the same counterproductive ideas seemingly forever. See: bi-wiring, bi-amping, a single sub, HT and multi-channel, AVR, etc.

Don't bridge but get speakers with 3dB+ more efficiency. 

Stock answers to stock questions are not going to help the op.

Much of the disdain for bridging comes from an erroneous view that the two channels must be perfectly matched for gain. They don’t.

The answer is always amp and implementation dependent but in general the advantages of bridging are:

- cancels out even harmonics the harmonics of bad sound
- improves power supply noise rejection
- reduces impact of signal modulation of the power supply
- reduces non linearity from large voltage swings (distortion)

And yes as noted their are downsides but it is not a slam dunk that it sounds worse.