GR Research PR-12A Passive Radiator

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These were specifically designed to be used with the SW-12B sub. When used with the SW-12B in a 2.4 cubic foot box it gives you a -3db down point of 21Hz.

In the center of the PR there is a steel bolt with nut and washer that can be removed to raise the Fs or more washers can be added to lower the Fs allowing it to be used in a number of applications. It is pre-tuned for use with the SW-12B so if using it with that woofer you will not need to mess with the diaphragm mass.




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