Did you actually pull the trigger on the Paradigm Atoms yet (previous speaker placement thread) or are you still looking?
If you are still speaker shopping and since shelf placement was something that you were considering, why not consider a speaker that would do well on a shelf? The NHT Classic Zero and Classic Two are sealed box speakers and excel with shelf/near rear wall placement. Many positive reviews out there. They do well with tubes or solid state amplifiers.
To answer your original question, with two mid-range/woofers, the Axiom should sound fuller and richer as it is using two drivers to cover the frequency range from 60hz to 3.5khz. It would not necessarily need more power. Its efficiency rating is 89db, whereas the Atom is rated at 90db ... pretty much the same.
Regards, Rich
If you are still speaker shopping and since shelf placement was something that you were considering, why not consider a speaker that would do well on a shelf? The NHT Classic Zero and Classic Two are sealed box speakers and excel with shelf/near rear wall placement. Many positive reviews out there. They do well with tubes or solid state amplifiers.
To answer your original question, with two mid-range/woofers, the Axiom should sound fuller and richer as it is using two drivers to cover the frequency range from 60hz to 3.5khz. It would not necessarily need more power. Its efficiency rating is 89db, whereas the Atom is rated at 90db ... pretty much the same.
Regards, Rich