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Dayton Audio DCS305-4 12" Classic Subwoofer 4 Ohm
I am connecting this woofer to the Dayton Audio SA240 240W Subwoofer Amplifier inside a 4 cft cabinet. Should the enclosure be sealed or ported?
I would recommend going ported tuned to ~22hz.4 cft a bit too large for a sealed enclosure as you will run into excursion problems below 48hz going ported helps but you will still see some over excursion at full power so be careful with the volume knob untill you learn it's limits. It reaches Xmax at 126 watts at 32 hz (the center of the excursion peak) in the ported enclosure.In the sealed encosure you only can take 102 watts before reaching Xmax at 32 hz. The ported enclosure will take its full rated input power at 20hz in the sealed enclosure you can only give it 50 watts before reaching Xmax.
Date published: 2014-01-24
How much difference might I expect from relacing the old speaker from my Dayton Audio Sub-120?
Probably not much. This sub needs a 4 cubic foot box for best performance. Your Sub-120 has about 2 cubic foot cabinet. The enclosure of the Sub-120 is designed to use the woofer that comes in it. Just dropping in another woofer will rarely improve the performance of a prefab sub. You may get a bit more low end extension, but because the ports are tuned for a frequency that accommodates the imperfections of the woofer that comes with the Sub-120, such as its low frequency impedance spike, changing out the woofer makes it so that compensation may be hitting a frequency that does need to be compensated, and thus also not compensating where the new woofer needs it. Your money would be better spent buying, or building, a new sub with a more robust amp and a larger cabinet that will outperform the Sub-120.It should be noted that the Sub-120 is no slouch. If you are displeased with its performance your issue may be due to its placement in the room, bass management settings on your receiver, or the settings on the crossover or phase switch of the sub its self. Its also important to note that bass frequencies are very long and need a large room to fully propagate.
Date published: 2012-04-25
2.45 Cubes ported
can someone please let me know how this sub would perform in a 2.45 internal volume and 1 inch by 16inch pe flaired port. im looking to find out how low and the rolloff at 20 hz. thanks for the help
2.45FT^3 is a bit large for this driver. The best way to answer your question is to use my answer to the question directly above yours. Here it is:This is a ported design with good power handling and a decent F3.Box Vb: 1.92Ft3Box Fb: 26HzFox F3: 32HzPort Size: 3" x 14" (Flared Ends)Box Dimensions: 25.5" x 16.5" x 11.5"Box is made with 3/4 MDF w/ 1.5" MDF Woofer Baffle BoardLine at least 2 walls inside the enclosure with fiberglass or Acousta-Stuff polyfill. If you use any bracing, you'll need to account for the volume of them in the box dimension.Minimum Power Handling is 213W @36Hz, otherwise it handles the full 250W the speaker is rated for down to 25Hz.If you don't want to build it yourself, you could use the Dayton Audio SWC2-VI 2.0 ft³ Subwoofer Cabinet, the Precision Port 3" Flared kit, and the Dayton Audio SPA250 250 Watt Subwoofer Plate Amplifier to power it. It should easily hit 115dB from 25-80Hz in an average room.Hope this helps.
Date published: 2014-01-24
If I use this subwoofer in a ported enclosure, what is the maximum recommended volume?
I currently have a ported enclosure for a 12" woofer in my car. Its external measurements are 15.5"x15.5"x29.5". Internal volume is roughly 2.85ft^3. The port is about 2" tall and runs about 17" into the box. Any info is appreciated. Thanks!
Read this thread and learn how to utilize the various design software packages. You will need it for multiple other design aspects, such as spacing of drivers, crossover design, etc.http://techtalk.parts-express.com/showthread.php?t=219617
Date published: 2014-01-24
What volume sealed enclosure would be needed for an F3 near 30Hz?
For a sealed application mostly for music, Would the Dayton SA240-B Plate amp be a better choice? Is there a better 12" sub for a sealed enclosure that is under $160 and uses a box under about 4 cu ft max @F3 of 30Hz?
I do normally recommend the SA240-B in sealed enclosures for the bass boost. However, this subwoofer will not play down to 30Hz in a sealed enclosure, under or over 4.0ft³. For music, sealed is usually the right choice, and this sub will get you down to about 45Hz no problem. Once you add room gain, it should be a very satisfying bass experience for most music. This subwoofer in a 4.0ft³ enclosure with a 4" port approximately 16" long, will play into the mid-20s. For a 12" sealed setup that will play down into the 20s, please refer to the Titanic kit linked below.
Date published: 2011-09-01
how this subwoofer work with a passive radiator?
I'm having distortion "I called Crank" why?
A passive radiator is, in essence, equivalent to a reflex port - in speaker design they can be used interchangeably.If you are tuning your radiator to exhibit a lower FS (resonant frequency) than the woofer, you may need to add a considerable amount of mass to the passive radiator - which will also somewhat alter the on-axis response of the woofer and extremely "light duty" woofers are especially susceptible to this change.Since this woofer has a stout motor and a fairly heavy cone, I suspect it should work very well with any correctly applied passive radiator.
Date published: 2013-09-30