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Dayton Audio DA115-8 4" Aluminum Cone Woofer
I looked through the specs and didn't find this: What is the Fo (free air resonance) of this speaker?
The free air resonance of this woofer is 60 Hz.
Date published: 2014-11-24
Cabinet size for four of these in a vented enclosure?
I would recommend an enclosure that is 0.6 cubic feet with a 2" diameter, 3" long port for a tuning frequency of 55 Hz.
Date published: 2014-11-03
Can I split a aux cord and attach it to the sub and plug it into my phone
A phone is generally not powerful enough to drive a speaker. generally you would better off with an amplifier to power this speaker.
Date published: 2014-06-02
can a pair of these be used as a mini subwoofer with a 60W amp?? if so what size box and port for an F3 in the 60Hz range
These will work with low power for an application like that. In 0.3 cubic feet for both, with a single 1.5" diameter, 4" long port it will be tuned to about 56 Hz. I would not recommend any more than 25 watts for both.
Date published: 2014-05-28
I am looking to use a set of these in my center channel speaker and using them with a Vifa BC25SC06-04
I am wondering about what i will be at resistance wise with a 3k crossover and this setup in parallel to each other. Trying to find out how to get close to 8 final from the speaker, but i am not 100 percent sure how the crossover changes the resistance in the setup
If you run two of these in parallel they will be at 4 ohms total in their pass band. You have a 4 ohm tweeter, so that will be 4 ohms in its pass band. Thus, you would have a speaker that is 4 ohms over it's whole range.Crossovers don't usually have much effect on impedance. However, they do decide over what frequency ranges individual drivers play, and thus determine how the individual driver's impedances effect one another.Here is a bit of explanation as to how this works. In your example you have two woofers playing over the same range (under 3kHz). Since they are both 8 ohm loads, and they are wired in parallel, the total impedance load that the amp would see is 4 ohms, for the low pass section. Since your tweeter is 4 ohms and is the only speaker playing above 3 kHz the total load for the high pass section (over 3kHz) is 4 ohms as well. Since the woofers and the tweeter are not playing over the same range, they have no effect on each others impedance. Thus your amp will see about a 4 ohm load regardless of what frequency signal it puts out to the speaker.Since you want to make an 8 ohm speaker, you need the high pass section to be 8 ohms and the low pass section to be 8 ohms. That pretty much means you need an 8 ohm tweeter. So, look for an 8 ohm tweeter. For the low pass you can get this in a couple ways. You can use a single 8 ohm woofer, or if you want to stay with 2 woofers, get two 4 ohm woofers and wire them in series. Or, and this is just for examples sake, you could get two 16 ohm woofers and wire them in parallel.Your next battle is going to be keeping the tweeter from being way louder than your woofer(s).I strongly suggest starting a build thread on the Parts Express Tech Talk forum. There are lots of DIYers there that would be willing to help you tackle all the issues that come with building your own speaker.
Date published: 2013-02-11
would this driver hold up in a sheltered outdoor application?
Yes this would be find in an outdoor environment.
Date published: 2014-03-03