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Dayton Audio SD215-PR 8" Passive Radiator
Would this PR be a good fit for the Dayton SD215A-88 8" sub in a .35 cu ft box? Or would I be better off leaving the subs sealed? This would be under each front seat in my car for midbass. Transient response is slightly more important than volume
Yes, that passive radiator will work well with the SD215A-88 in a .35Ft3.
Date published: 2015-04-10
Im building a set of Line-Arrays 7"x72"x 11" internal , with 8- SB Acoustics 5" - SB13PFC25-08 . I was thinking of using 2 x 8" radiators one on each side at the bottom of the case ,is my assumption correct on size of radiator and mounting location ?
You will actually need eight of those passives in order to maintain a high enough tuning frequency and keep excursion down. Eight passives with no weight added would provide a tuning frequency of about 45 Hz and F3 of 70 Hz. In the volume you have you could also just port the enclosure with two 4" diameter, 5" long ports for the same tuning frequency but an F3 around 50 Hz.
Date published: 2015-03-20
Looking to make a small subwoofer for the garage using this with the Tang Band W6-1139SIF 6.5. Is .33 cubic ft. the ideal size and how much weight would i need to add?
Yes that volume is perfect. I would add 75 grams to the passive which will provide a tuning frequency of 35 Hz and an F3 of 44 Hz.
Date published: 2015-01-19
I am making a cooler stereo. I am dividing the space for cold drinks on one side and the stereo components on the other. I am using (2) 5 1/4" Polk Audio Marine speakers and a 8" Polk Audio Marine Subwoofer. Will a passive radiator benefit this build?
Unfortunately without being able to model is properly there is no way of knowing whether it will be beneficial or not. Generally speaking, marine and car subwoofers will be best suited for a sealed box so adding a passive will create a bump in the response, almost like a bass boost. This may or may not be something you like.
Date published: 2014-07-22
What is the correct Mms? It is listed on this and the 10" as 0.75g an absurd #-looks like it was accidentally rekeyed from previous param-should be in the hundreds
Yes the decimal is in the wrong place, this should be 75 grams.
Date published: 2014-03-20
What is the Maximum weight you can add to this series of Dayton PRs ?
Thanks... I searched and found nothing.I'd assume anything in the ounces (sub 500grams) and not pounds will be fine.
A good general rule of thumb for any passive radiator is to add no more than 3 times the Mms of the radiator in question. This radiator's Mms is 75g, so 225g would be the absolute maximum you'd want to add. If the system will be subject to very low frequencies and/or high power, i.e., "pushed to the limits," then 2.5 times the Mms might be a better choice, 187g or so in this case.
Date published: 2015-01-15