pros and cons of dual speakers?

Answer 1

Do you mean dual speakers as in a pair of speakers, or do you mean Dual speakers, as in speakers made by Dual (manufacturer)?

And if you mean speaker pairs, are you referring to using left and right speakers, or are you thinking of using more than one speaker on each channel; ie, putting two speakers in the same door?

Or are you talking about using two subwoofers instead of one?

We need a much more detailed question to give you a meaningful answer.

Answer 2

Pros: More Speakers, phase and impedance options.

Cons: Takes more space, costs more money.

Answer 3

stereo sound...it is really cool listen to led zeppelin II ,
or pink Floyd dark side of the moon