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Dayton Audio SD215A-88 8" DVC Subwoofer
Could I run this in parallel with a set of bookshelf's at 20wpc?
I'm looking for an economical subwoofer for a 2.1 system. I'd want to run this in parallel with a set of full range Dayton RS100-8 bookshelf's and use the Lepai TA2020 to power it all.Bad idea?Recommendations?
Yes, but you probably won't be happy with the results. A low efficiency sub in parallel with more efficient bookshelves and a low power amp probably won't be audible in the very lowest octave you want to boost. The addition of the sub this way might actually give you a muddy mid-bass because the sub is not crossed out of full-frequency response and both the sub and your ear are more efficient at frequencies above the low bass. I doubt you are trying to add "mid-mud" to your system, but that is likely to be the only audible result.
Date published: 2013-02-17
Could I use the knock-down subwoofer enclosure (part#300-7068) with this sub if I added some polyfill? I know the box is only .67ft and the sub calls for at least .95ft ported but I was hoping by adding polyfill I could make up for the smaller volume?
Yes that enclosure will work. Adding poly fill will not make up for the lost cabinet volume, it will just have a slightly higher tuning frequency.
Date published: 2014-02-19
Would this subwoofer be able to be used as an replacement to the subwoofer in Sony's MHC-EC909iP mini Hi-Fi system?
Without access to the Sony system this is difficult to answer. From the literature, Sony specs a "7.9 inch" sub. That's odd, and if you find that the 8" Dayton doesn't fit, you are dealing with enlarging slightly a plastic enclosure. That is a messy project. I also have concern that the woofer may be too deep for the enclosure, and there is no fix if it is. Sony doesn't seem to spec the depth.Minor concerns are that Sony specs the sub at 12 ohms, and doesn't say if the existing speaker is single or double voice coil. You might have less than an optimum match between amp and speaker. The Dayton is rated at 80 watts max. The Sony system is rated at 250 max. It is remotely possible that enough power is available at the sub output to damage the Dayton.For a $190 system, I would not do this mod, but I also cannot say with certainty that it absolutely would not work.
Date published: 2012-10-02
could this be powered with a 25 watt amp?
i have a small 10x10 room that i would like to add a sub to and this seems like the best bang for the buck 8 inch driver i can find. so, being on a budget, can i power this successfully with dayton's SA25? is 25 watts enough power for this application?
No reason you can't do that. The 25 watt amp should bring things to pretty decent levels in a small room like yours. There is no harm using less then the recommended power with a subwoofer driver, you just leave a some output on the table going with the smaller amp.
Date published: 2013-09-17
Sealed and ported
What would be a good sized sealed enclosure with the flattest response? Also what about the smallest ported for around 40hz?thanks.
If you use a sealed enclosure, then the box should not exceed .59 ft^3. At this internal volume the speaker will be at a Qtc of 0.707 and (Fc & F3 @ 56.21). This will offer an ideal frequency response, which will reflect the music in a more natural form or in your case a flat response across the curve. I ran some calculations for a ported enclosure and came up with a box size of roughly 1.2 ft^3, with a 4.5" X 6" port. This will result in a tuning of approximately 35hz give or take 5hz. I should mention that the graph for this ported enclosure indicates a "bump" at around 40hz, FYI. I have not heard this speaker directly, but from the numbers it should sound okay. Depending on the amount of bass and SPL you are trying to achieve, you might want to consider multiples.
Date published: 2013-06-16
Can I run a 4ohm load to each side of the voice coil?
Wondering if I can use two of the channels from a 4x100W @ 4 Ohm TK2050 Class-T Digital Audio Amplifier Board, Part #: 320-302into this DVC sub?martin
It is perfectly acceptable to connect one amp channel to each side of this driver. A 4 ohm amplifier will not have any trouble driving the 8 ohm load.
Date published: 2012-12-19