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Dayton Audio ST385-8 15" Series II Woofer
whats the recommended ported enclosure for it
Most manufacturers DO post a "recommended" enclosure, even though they are or should be fully aware that you cannot have such a thing that works with all different size rooms, seating positions, input power levels, response requirements, etc. The location of the enclosure in relation to the room walls/corners, as well as in relation to the listeners position, is just as important as the location of the port and location of the subwoofer cone ON the enclosure. If the room has hardwood floors, there is a difference in how the enclosure would be designed versus a thick-pile carpet. I recommend you, and everyone else who asks this type of question, to search the internet for acoustic engineering services. A seriously qualified engineer should be able to design exactly what is needed to accomplish your specific goals. They will charge for their service. But, you would not buy a 500HP motor for your camaro all to throw a cheesy transmission on it would you? It's all about how the entire package works together as a whole. Manufacturer blanket recommendations can guarantee nothing in terms of performance/response or "what you'll hear".Best regards
Date published: 2014-12-14
What port size[s] would I need for a 6.5 cu ft box. please?
I'm hoping to hear my pipe organ records as they should be!
In your 6.5ft³ enclosure, you'd want two 3" ports about 11" long each. This will tune your box to around 21Hz, and provide an F3 frequency of 23Hz. In this configuration, the ST385 should handle at least 200 watts before running into any excursion problems.
Date published: 2012-07-18
what port diameter and length would work in a 3 cubic foot box?
My Dayton series II 15" woofers are in a sealed box of 3 cubic feet. I know a vented box should ideally be much bigger to acheive optimal depth. However, I would like to increase the depth of the bass as much as I can within the current box. What do you recommend as far as port length and diameter? The woofer is in a three way passive system handling the frequencies from 312Hz on down as low as we can get it to go.
In your 3.0ft³ enclosure, I would suggest two 3" ports, each about 24" in length. This will put your F3 frequency down to approximately 32-33Hz.
Date published: 2012-09-02