i was reading the 12v glossary and came across the definition of passive radiator....so heres my question
if i had a single 15 ported in my trunk....what would be the pros and cons of replacing it with a passive radiator setup.....i know that it would eliminate port noise for one....but since the radiator moves......wouldnt it allow more air movement therefore creating more sound?
Replies (3)
swez on 08/21/2007 00:19:52
Passive radiators are fine for small format speakers in Home Theater applications. Yes, they act like a port and resonate at specific frequencies based on many variables. Not recommended for car apps though.
If I recall correctly, they are often large cones and tuned by mass/diameter of the radiator and Fb of the enclosure. It seems a bit more complex and the results don't justify the cost and space.
Swez
trunkisloud on 08/21/2007 00:26:56
yea i figured something like that cause you dont see these in anyones trunk...thanks for the info..
Ash on 08/21/2007 06:03:46
There have been a limited amount of designs utilizing PR's. They mostly were truck boxes as it is the most practical place to use one. Reasons were mainly the lack of sufficient room for long tuning ports and/or relatively low tuning in small boxes. They are not without flaws however.
I believe Pioneer was one of the first to make one (for cars that is), then came others, like the Kenwood Woox designs, etc. There is nothing wrong with these designs, as long as it's use is practical (limited space). Trunks or cars with sufficient room can benefit from traditional designs with far less complexity.
if i had a single 15 ported in my trunk....what would be the pros and cons of replacing it with a passive radiator setup.....i know that it would eliminate port noise for one....but since the radiator moves......wouldnt it allow more air movement therefore creating more sound?
Replies (3)
swez on 08/21/2007 00:19:52
Passive radiators are fine for small format speakers in Home Theater applications. Yes, they act like a port and resonate at specific frequencies based on many variables. Not recommended for car apps though.
If I recall correctly, they are often large cones and tuned by mass/diameter of the radiator and Fb of the enclosure. It seems a bit more complex and the results don't justify the cost and space.
Swez
trunkisloud on 08/21/2007 00:26:56
yea i figured something like that cause you dont see these in anyones trunk...thanks for the info..
Ash on 08/21/2007 06:03:46
There have been a limited amount of designs utilizing PR's. They mostly were truck boxes as it is the most practical place to use one. Reasons were mainly the lack of sufficient room for long tuning ports and/or relatively low tuning in small boxes. They are not without flaws however.
I believe Pioneer was one of the first to make one (for cars that is), then came others, like the Kenwood Woox designs, etc. There is nothing wrong with these designs, as long as it's use is practical (limited space). Trunks or cars with sufficient room can benefit from traditional designs with far less complexity.
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