Get your questions answered from other customers
who own this product or have experience with it.
If your question requires design or troubleshooting information,
please email firstname.lastname@example.org
for a prompt reply.
Dayton Audio ST385-8 15" Series II Woofer
If I wanted to create a vented design [4.5 cubic feet] via a rounded edges slotted port or a 4" port, what what the size or length be, respectively? I'm trying to minimize port chuff on the bottom end.
A dual flared 4" port will need to be 14" long for a tuning frequency of 22 Hz. A slot port would need to be 3" x 6" and 20" long for the same tune. For the lowest vent velocity, the slot port will likely be better.
Date published: 2014-02-13
Witch 15" woofers will fit the PA knock-down trapezoid speaker cabinet part # 245-326, and what is the top 3 woofers that fit.
There are many many options that will work in that enclosure. The top three can only be determined by your specific application requirements.
Date published: 2014-01-20
if I were to put this driver in a 10 qubic ft sealed box what would be my low freq cut off point. my free online calculator suggests 41 hrtz for 2.5
cu.ft the problem is it doesn't allow input for different box sizes. 41 isn't bad for that sized box but I wouldn't mind at all buildinga bigger box if I could get down in the 20's of hertzes.
In a sealed box, I don't see a lot of changes in the F3 or 3 db down point. The main difference in the larger cabinet is the rolloff slope. The 2.5 cubic foot box is 15 db down at 20 Hz and the 10 cubic foot box is 9 db down at the same frequency. The cone is also not controlled as well in the larger box.
Date published: 2012-11-27
I have a prebuilt box that is a little over 4 cubic feet and has 2 3 inch ports, each about 4 inches long. For this woofer, what adjustment would I ne
This woofer works very well in 4 cubic feet vented, you will just need to extend the port length to about 12" for a lower tuning frequency of 25 Hz.
Date published: 2012-11-16
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: 2013-02-08
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