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When should I use a passive radiator? With what woofer? |
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Written by Administrator
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Wednesday, 11 October 2006 15:14 |
Use a passive radiator when you would like to have the extra output of a vented system, but are not able to fit an adequate port into the enclosure. The tuning of a PR is determined by the amount of mass on the diaphram, where the tuning of a port is determined by length. Often if you want to get low tuning in a small enclosure, an adequate port will just not fit. You either need to sacrifice output by going with a smaller diameter port, or sacrifice low end extension by going with a higher tuned port. For example, we use a single 15" woofer in an enclosure tuned to 20Hz with a pair of 18" PR's. If you wanted to get the same tuning with an adequate port, it would need to be 6" diameter and nearly 60" long and you would STILL have problems with vent noise.
You typically only want to use a passive radiator along with a woofer that is designed for a vented enclosure. A passive radiator enclosure is NOT a sealed box enclosure. You will typically want to use a lower Q woofer with a PR system. This usually means a woofer with Qts of .4 or lower.
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Last Updated on Sunday, 11 May 2008 21:02 |
Category Blog