quick question

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#2
Yes.
But generally it's not going to make a "good" passive radiator, once you stick it in the box the FS will go up. Passives are usually very soft suspension and heavy moving mass so when you stick them in a box they are still tuned low enough to be useful. You can always load the woofer cone with mass to lower the FS. There is a big YMMV on how well your woofer takes to this modification though.
 
#3
Interesting, That makes sense and I feel like the extra weight might ruin the driver if it is not applied evenly, perhaps a heavy paint or something might work? I personally wouldn't use a passive radiator [or a normal driver as one] I was just curious.
 
#4
It's also possible to add various (usually passive) tuned electrical networks to the terminals of a speaker used as a passive radiator, even allowing you some tunable controls you can alter while listening. Can't remember where I read about doing this...Sorry I'm not more help...but you might get a PR with a network to avoid some common port problems. You might control the cone below tuning. You might lmiit excursion. I'd have to think about this more... And of course a PR might take less space than an equivalent port.

I've doped down many a driver; spraying or brushing on epoxy is one way, but others prefer lead weights or lengths of solder glued around the dust cap near where the coil former meets cone.
 
#6
Hi,

Yes it can if it matches the other driver. A further step is to simply add
switchable resistances across the driver to affect the ABR/PR damping.

For a good adjustment range you want a high Qms, low Qes driver.

rgds, sreten.
 
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