I have a peerless xls 10'' subwoofer 830452 that I was going to use in a closed box with a peerless passive sub 830481 which is now discontinued I have not been able to find one and would like to know if there is a compatable replacement that would work. It does not matter if it is a different brand. thanks rhen
09-30-2009, 09:22 PM
Parts Express sells a nice 12" PR that would likely work well with that driver:
Unfortunately, it's a little spendy!
An alternative would be to use two of these:
or two of these:
These are much less expensive, so that even though you would purchase two of these, the cost is still less than buying only one of the first PR.
The latter two PRs do not have as much Xmax as the first one and, because there are two of them, you may need to add more mass than they are rated for in order to tune to your box to the desired resonance frequency. I suggest that you model them before buying to make sure that they will work well with the driver.
Caution: I would strongly recommend NOT exceeding Xmax of the PRs, in fact the maximum cone excursion of any PR should probably be kept below 0.8-0.9 * Xmax. It is different than with a driver, when excursion that exceeds Xmax by a small amount might be OK. That is because the limiting factor for a PR is the suspension limits, while Xmax in a driver typically limited by falling motor strength. Limiting by the motor typically happens before the suspension limit is reached (for subwoofer type drivers). On the other hand, when the suspension of a PR reaches its Xmax, you are likely running in to a hard limit, e.g. the suspension is bottoming out mechanically. This would cause (audible) noise and could damage the PR, so don't go there. Also, suspensions can do funny things at their limits, like get very stiff or get very soft compared to the rest position. This causes the Q and resonant frequency of the PR to change at large excursions, which will mess up the response of the system. This is why it is best to be somewhat conservative with PR excursion.
Also, note that having two PRs instead of one has the advantage that, if they are mounted on opposite sides of the cabinet, vibrations induced by the motion of the cone and mass of the PR cancel out in that configuration.
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