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RE: -3db @18 Hz?. Doesn't horn physics get in the way here? NT

I wrote about that configuration in a 50Hz horn, but never used it for sub bass horns. In that application I found that a sealed rear chamber works just as well, so the added complexity of venting the chamber into the throat wasn't justified. I still vent the chamber into the throat with some of my midbass horns, but response doesn't go much lower than venting outside of the horn, and there is a decided sensitivity step below the horn cutoff frequency. Judging by the horn path length that's possible with this new Jublilee it can't have a horn cutoff frequency much below 35Hz, so if it's -3dB at 18Hz that's the product of EQ.

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