has anyone used this particular sub for a vented sub project with any success? i was considering using this sub with the 5.48 cu. ft vented cubed box recomended by their free box program. also, was going to use parts express's 250 watt plate amp. i figured i could build it for around $300.00 or, i was also looking at this sub sw1515, for $450.00 plus shipping. http://www.mtxaudio.com/homeaudio/products/subwoofers/ thanks for any advice, crippledchicken 🙂 ps. i listen mostly to music
The 295-130 (Dayton Series II 15") is an 8ohm sub, so you won't be getting the full watage from one of PE's plate amps as the power ratings are for a 4ohm load.
For this reason alone in that price range you should be looking at the 4 ohm Dayton Quatro 15" (295-560) instead. Also the Quatro has 2mm more xmax (10mm vs. 8mm) and it costs a whole $2.60 less 😉
As for the plate amp the 250w (300-794) is a good amp and is used by many people. But don't overlook the 200w sub amp at PE (300-804) for your aplication. Check out the review by Darren at PE http://www.partsexpress.com/pdf/300-804r.pdf
The 300-804 has a 24db lowpass xo which is far superior to the 12db xo found in the 300-794.
As for the box, vented 5.5-6 cu.ft. for the Quatro should get a reasonable sized room shaking with great authority.
For this reason alone in that price range you should be looking at the 4 ohm Dayton Quatro 15" (295-560) instead. Also the Quatro has 2mm more xmax (10mm vs. 8mm) and it costs a whole $2.60 less 😉
As for the plate amp the 250w (300-794) is a good amp and is used by many people. But don't overlook the 200w sub amp at PE (300-804) for your aplication. Check out the review by Darren at PE http://www.partsexpress.com/pdf/300-804r.pdf
The 300-804 has a 24db lowpass xo which is far superior to the 12db xo found in the 300-794.
As for the box, vented 5.5-6 cu.ft. for the Quatro should get a reasonable sized room shaking with great authority.
You wont be getting the full wattage but it will only be 3db less output
Absolutely this is very much more desirable!!
thanks alot guys, you saved me from making a big, mistake ordering the parts i was thinking of getting. i never new they had that model plate amp as it was not listed at parts express unless, i overlooked it but yes, your right i think that would be a better way to go. that model driver isn't in their free box design software but, i entered the 295-130 driver just, so i could get to their cubed box panel sizes calculator for 5.5 cu. ft box using 3/4 in. mdf and get the panel sizes. i'd rather have the 1 in. mdf but, not available in my area. i guess bracing will help? what i've wondered about is, the effect of the internal volume that the plate amp will consume when installed which i dought, is figured in with the 5.5 cu. ft box, will have on the box tuning reducing the internal volume? or, would it be better to build outside damped, chamber on back of sub to mount amp to and retain the full internal volume as, i know building vented subs are more critical to internal volume than sealed but, this is my first sub project. i planed on using the 4 in. double flared vent also. in my small mobile home, i'm sure that would be plenty of output he he. any extra advice is welcomed thanks, crippledchicken 🙂
For interest I modelled the 15" quattro in WinISD pro. I did two options - sealed and vented.
Sealed box - 100L - max SPL 103db @ 25 Hz ... 111 @ 40 Hz
Vented box - 205L - max SPL 112db @ 25 Hz ... 113 @ 40 Hz
tuned at 20 Hz
For double the volume, the vented box offers little more for music as most music is above 40 Hz (at which point the 2db difference in max output is barely audible).
With this driver in either of these boxes, the 250w plate amp should have enough power. Xmax is reached in the vented box at just over 200w @ 30 Hz. Xmax is reached in the sealed box at 160w @ 20 Hz but 300w is needed at 40 Hz.
The chart shown compares vented vs sealed. The sealed box has a linkwitz transform to match the extension of the vented box. The output shown is for an amount of power supplied to each that will not exceed xmax above 20 Hz (*note: shown at 3m distance, not the usual 1m ... add 9db for output at 1m). This makes the vented sub look louder than it may in fact be. For music, the sealed sub will handle much more, but is SPL limited when it needs to get down to 20 Hz - so this shows the kind of output you will get if used for HT. For music, the extension and output will be barely any different.
You will notice a downward slope of the response. This is a good thing as it will probably match room gain, resulting in an inroom response to below 20 Hz.
Unless you want both loud and low (HT LFE use), then I'd go with the sealed box. The Quattro is a value for money sub and I doubt you could buy anything comparable.
Sealed box - 100L - max SPL 103db @ 25 Hz ... 111 @ 40 Hz
Vented box - 205L - max SPL 112db @ 25 Hz ... 113 @ 40 Hz
tuned at 20 Hz
For double the volume, the vented box offers little more for music as most music is above 40 Hz (at which point the 2db difference in max output is barely audible).
With this driver in either of these boxes, the 250w plate amp should have enough power. Xmax is reached in the vented box at just over 200w @ 30 Hz. Xmax is reached in the sealed box at 160w @ 20 Hz but 300w is needed at 40 Hz.
The chart shown compares vented vs sealed. The sealed box has a linkwitz transform to match the extension of the vented box. The output shown is for an amount of power supplied to each that will not exceed xmax above 20 Hz (*note: shown at 3m distance, not the usual 1m ... add 9db for output at 1m). This makes the vented sub look louder than it may in fact be. For music, the sealed sub will handle much more, but is SPL limited when it needs to get down to 20 Hz - so this shows the kind of output you will get if used for HT. For music, the extension and output will be barely any different.
You will notice a downward slope of the response. This is a good thing as it will probably match room gain, resulting in an inroom response to below 20 Hz.
Unless you want both loud and low (HT LFE use), then I'd go with the sealed box. The Quattro is a value for money sub and I doubt you could buy anything comparable.
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If you are using a sealed box with a Linkwitz transform, then you can easily make it half that volume - 50L. Here is another chart which shows 100L sealed box with LT (blue) vs a smaller 50L box with LT (green). The smaller box has more power applied so that xmax would be exceeded below 40 Hz.
A 50L box such as this would be approx a 420mm cube, allowing for 18mm MDF walls, some bracing and some volume for the plate amp and driver. Ideally you would make it a little bigger and build the plate amp into its own chamber - this saves any hassles with air leaks where the plate amp is mounted on the box. Speaker cables can be conntected through screws through the internal wall.
A 50L box such as this would be approx a 420mm cube, allowing for 18mm MDF walls, some bracing and some volume for the plate amp and driver. Ideally you would make it a little bigger and build the plate amp into its own chamber - this saves any hassles with air leaks where the plate amp is mounted on the box. Speaker cables can be conntected through screws through the internal wall.
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VERRY INFORMATIVE INDEED!
thanks verry much for taking the time to calculate all of that great info paul. i wasn't expecting that kind of help but,WOW it sure was appreaciated. i'll have to print all that info out as it's sure going to come in handy, when i go to build the sub. thanks again, crippledchicken 🙂
thanks verry much for taking the time to calculate all of that great info paul. i wasn't expecting that kind of help but,WOW it sure was appreaciated. i'll have to print all that info out as it's sure going to come in handy, when i go to build the sub. thanks again, crippledchicken 🙂
Rather than print it out I'd suggest you consider downloading WinISD pro (better than the standard version), I can send you the files (driver parameters already entered in), and you can have a play as it will help you understand things. It's definately worth having a play around before you build.
I am actually planning on building a vented Quatro 15" and PE 200w plate amp sub woofer very soon for my HT. I currentley have a sealed 10" Titanic sub that just doesn't give me the HT leves I want. It will be in about a 5.7 cu.ft box. I'll most likely stick the big ported sub in the back corner and keep the 10" in the middle up front.
Here is how I'd build it. 450 x 450 x 450 mm looks about right and gets a good volume - with sealed you don't have to be too fussy. A separate chamber is shown for the plate amp in the back.
Bracing is not shown. Ideally you should have 3 intersecting planes of bracing, so that each sheet will touch 4 sides of the box. You will of course have to cut them around the driver and the amp chamber. You will also have to cut holes in them so the woofer "sees" the whole air volume behind it.
Bracing is not shown. Ideally you should have 3 intersecting planes of bracing, so that each sheet will touch 4 sides of the box. You will of course have to cut them around the driver and the amp chamber. You will also have to cut holes in them so the woofer "sees" the whole air volume behind it.
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hi paul, that looks good to me. i guess on the amp chamber, it just needs large enough with a little clearance and centered on back of box? i've downloaded WinISD alpha but, some of the paramaters it wants, i couldn't find in the parts express pdf specs but, i'll keep trying to learn to use the program and maybe i'll figure it out he he. thanks again, crippledchicken 🙂
I'd put it towards the bottom as it's simpler that way as shown in the diagram section.
I suggest you look at WinISD pro as the other version tells you very little. Pro version shows excursion and max power. Entering in the parameters is tricky as it usually finds conflicting parameters, so what you have to do is pick the ones that are critical and enter them, and where you have a conflict, let it calculate the ones that are less important.
eg. it might find a conflict between fs qts vas mms
so enter in everything from your data but delete mms and it will calculate it
If you shoot me an email I can send you the file of the driver parameters if you get stuck.
Quattro - with pdf data
Direct link to pdf sheet
I suggest you look at WinISD pro as the other version tells you very little. Pro version shows excursion and max power. Entering in the parameters is tricky as it usually finds conflicting parameters, so what you have to do is pick the ones that are critical and enter them, and where you have a conflict, let it calculate the ones that are less important.
eg. it might find a conflict between fs qts vas mms
so enter in everything from your data but delete mms and it will calculate it
If you shoot me an email I can send you the file of the driver parameters if you get stuck.
Quattro - with pdf data
Direct link to pdf sheet
Also watch putting the amp inside a box that is too small and well sealed! It might get hot! If it becomes a problem this outer chamber could be vented, although I imagine you should be able to make it big enough for it not to be a problem.
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