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Aren't passive radiators out of phase?

Passive radiators seem like a great idea, but they must be out of phase with the driver. Yet, you see them on some pretty good speakers, such as the Sunfire subs. All I can think is they provide a spring-board, storing energy for the driver. Still, any sound produced by the PR is out of phase though. Any thoughts?
jhimnsue
chelillingworth
309 posts
 
The drivers of most speakers except for Meadowlark, Vandersteen and a coupl of others are out of phase due to the high order crossovers most commonly used.
rwwear
2,880 posts
 
Passive radiators have to be out of phase but drivers can be wired to make them in phase to compensate for the crossover.
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sean
6,231 posts
 
Besides the phase considerations, you should look at the transient response of all vented designs. Passive radiators are the slowest of the slow but can still sound "good" if done right. I much prefer a well tuned passive radiator to that of a port for multiple reasons. Sean
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