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Peerless 830878 3-1/2" Passive Radiator
Hi Im planning on building my first portable speaker. Im planning to get 2 Peerless 830985 2-1/2" Full Range Woofer. would this passive radiator be ideal and how much volume is required for the enclosure? and how where would the radiator be placed?
You will get a much better response from the full range if you simply port the box. In 0.04 cubic feet, a 1/2" diameter, 2" long port will tune the box to 70 Hz. The Peerless PR will tune it closer to 50 Hz and you will lose a lot of the perceived output down low.
Date published: 2014-10-21
What is the Vas, Qms and Xmax of this passive radiator? I need it to look at speaker cabinet designs.
The specs for this passive are:Fs: 29 HzQms: 1.445Vas: 0.1 cu.ftCms: 791 um/NMms: 38.5 gRms: 4.8 kg/sSd: 50.2 sq.cmXmax is not provided by Peerless, but I would say it is around 5-6mm one way.
Date published: 2014-10-20
I have one pair of 830855:s and one pair of 830856:s lying around, brand new. I'm thinking about using these together with a couple of 830878. What would be a suitable enclosure volume for one driver together with one or two passives?
This passive will work with both of these relatively well. For the 830855 I would recommend .08 cubic feet total with two passives for a tuning frequency of about 60 Hz, no weight added. For the 830856 I would recommend .13 cubic feet total with two passives for a tuning frequency of 50 Hz, no weight added.
Date published: 2014-10-16
What will be the suitable parameter to look for while considering PR's? Like for vented enclosures, we can key in dia and program will tell the length. So for passives, what should I key in that will tell that this PR is suitable?
There isn't a single parameter that will tell you whether a given driver will work well with a passive radiator. Usually drivers that are designed for very small vented enclosures will work with a PR, especially if the volume is too small for a port to be practical. In order to tell how well it will work with a given PR, a model will need to be done.
Date published: 2014-10-07
I would be very interested to know which programs I could use to tune(with great precision) the passive radiator with the enclosure. Help please ?
The program we sell that would work well for this is BassBox 6 Pro which you can see below.http://www.parts-express.com/bassbox-6-pro-software-cd-rom--500-923
Date published: 2014-09-23
Can I use this radiator with two ND91-4 3 1/2" in an enclosed box of 10" x 2.75" x 4.25"? Thanks!
This should work well. A single radiator will tune the enclosure to about 66 Hz with no weight added.
Date published: 2014-09-03