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Old 07-22-2016, 04:50 PM
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Default Down Firing PR

Hello PSI Team and all,

My goal is to maintain SQ however provide a boost in SPL. Listen to Hip/Hop, Electronic, R&B, Punk and some Country for the ladies lol.

Trying to see if this will work for my current set-up. As is I have a .51-.53 ^3 sealed down firing enclosure for a single Sundown Audio SD-3 10.
W34" x H11" X D5"

This is placed in a 06 Miata and is downfiring since the soft top folds directly over the enclosure perfectly. The system is of course a beauty with the top up and does not need a lot of power. With the top down though I do provide full power to the subs and it helps. Due to the mechanics of a convertible, as much as I'd love to add another 10 it's just not going to happen & ported is well out of the question.

Tried to do a little more searching and seems like a PR may be a compromise of the two. My understanding is a Passive should provide great/maintain SQ while providing a great SPL boost(Am I understanding this right?). If the frequency is around 28 Hz, it should drop off in the frequencies prior which shouldn't be a problem (difficult/can't hear) anyway while the remaining are slightly boosted especially around the tuned frequency.

Passive Radiators don't seem to be around as much (Internet/youtube wise) at least nowadays and was wondering if a down firing option would work while being on the same face as the woofer. The "Aespeakers" website for the most part says no to down firing. Then there are various home theater set-ups that do use a down firing scheme.

Best,
Zio
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Old 07-25-2016, 10:12 PM
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Most of the recommendations to avoid down firing passive radiators are given with passive radiators that have extremely soft/suspension that would not be capable of handling any additional moving weight. Our passive radiators are quite a bit more substantial than most others. Unless you are using an extremely high amount of additional weight, I think that you'll get great results with a down firing configuration.

It would be great if you could install 2 10" passive radiators or a single 12" but I know that you are restricted with the measurements.

I think that the 10" PR is probably your best bet. You'll be able to adjust the tuning. I would probably recommend trying this with no additional weight at first. You can always add weight to lower the tuning later.

So yes… I would buy a 10" passive radiator and cut a hole. ;-P
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Old 08-01-2016, 01:45 PM
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Thanks for the input Team PSI, really appreciate it. My other inquiry is when it comes to a PR system, do both the active and PR provide the bass or just one?

Quote:
Originally Posted by TeamPSI View Post
Most of the recommendations to avoid down firing passive radiators are given with passive radiators that have extremely soft/suspension that would not be capable of handling any additional moving weight. Our passive radiators are quite a bit more substantial than most others. Unless you are using an extremely high amount of additional weight, I think that you'll get great results with a down firing configuration.

It would be great if you could install 2 10" passive radiators or a single 12" but I know that you are restricted with the measurements.

I think that the 10" PR is probably your best bet. You'll be able to adjust the tuning. I would probably recommend trying this with no additional weight at first. You can always add weight to lower the tuning later.

So yes… I would buy a 10" passive radiator and cut a hole. ;-P
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Old 08-03-2016, 08:55 PM
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Both. They both radiate, and make BASS!
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