I have 2 sundown x-15s ready to be used... i dont have money to throw... no amp at the moment but looking at a sundown amp... my question is what should i do about a correct box... he site has no box specifications or anything to have a tuned box setup...?!?
For 2 15's I'd do around 7 cubic ft net tuned to 28hz, if this is for a car anyways, you said sundown amp and AFAIK they dont' do HT amps.
HT? Im not familiar with most of this stuff... just know about regular hookups and low budget speakers and pre fab boxes lol... but this is for a yukon xl
Sundown support finally wrote me back stating that it should be a 4.5 ported box for one tuned at 30hz but would that change if i used two... of course size will but im saying would it then be 9 cubic ft? And still tuned to the same frequency?
There are two in their page. Please always use full spec info to get a full response from this forum when addressing models.
X-15 D2 TS Parameters vs. X-15 D4 TS Parameters
http://www.sundownaudio.com/index.php/products/subwoofers/item/x-series.html
X-15 D2 TS Parameters vs. X-15 D4 TS Parameters
http://www.sundownaudio.com/index.php/products/subwoofers/item/x-series.html
They are the D2. setup will be for a yukon xl... sundowns customer service said to use a 4.5 cf box tuned to 30hz but i have two speakers so would i double the size?
Yes, each.
See, that's a practical set-up not excellent. In this case would not be executable with very long impractical ports. The stupid thing is that will give you ports 1 to 2m (meters) long. Test a 90/80L cabinet sealed first. if you don't like o to the crazy BR... or bandpass.
An intermediate project deserving the testing by you, before going/jumping to craze impractical size/dimensions and impossible alignments, would be to execute a test speaker for future endeavors that work fairly good, for this:
SUNDOWN X-15 D2, VB = 90.9 L, FB = 25.0 Hz (each). For the two it all depends amp you are using, impedance series (9.3 Ohms)/parallel (2.3 Ohms) but count with max. (W) power amps. Drivers in sealed arrangements needs less amp than the BR's. In a factor of 1 to 5, or 2.6K to 15K in this case. Not that you are using all that power of course.
Port diameter: 19cm = 7 31⁄64in
Area (S): 283.53 cm2
Length of the port: 135cm/53.5in(+/-)
Not enough saying that is for each driver. For a two (2x) driver sealed just make a 180L = 6.3566ft³ test bed.
See, that's a practical set-up not excellent. In this case would not be executable with very long impractical ports. The stupid thing is that will give you ports 1 to 2m (meters) long. Test a 90/80L cabinet sealed first. if you don't like o to the crazy BR... or bandpass.
An intermediate project deserving the testing by you, before going/jumping to craze impractical size/dimensions and impossible alignments, would be to execute a test speaker for future endeavors that work fairly good, for this:
SUNDOWN X-15 D2, VB = 90.9 L, FB = 25.0 Hz (each). For the two it all depends amp you are using, impedance series (9.3 Ohms)/parallel (2.3 Ohms) but count with max. (W) power amps. Drivers in sealed arrangements needs less amp than the BR's. In a factor of 1 to 5, or 2.6K to 15K in this case. Not that you are using all that power of course.
Port diameter: 19cm = 7 31⁄64in
Area (S): 283.53 cm2
Length of the port: 135cm/53.5in(+/-)
Not enough saying that is for each driver. For a two (2x) driver sealed just make a 180L = 6.3566ft³ test bed.
So, as you see this is more of a practical project of what it is possible in reality and in the first place. Test and simulate the project from the last post (#9) to a manageable size for the car set-up, 127L (net) BR more the space for/taken by the port (30Hz) or option sealed where you can play with a smaller enclosure ~150L or less to fit the space available, than the standard above from post #8.
Hi,
4 cuft sealed and well stuffed for both looks look
good to me if quality over quantity is preferred.
According to a quick sim vented they need very
low tuning to avoid the "one note bass" syndrome.
About 20 Hz and a 7cuft box for both in the sim.
rgds, sreten.
4 cuft sealed and well stuffed for both looks look
good to me if quality over quantity is preferred.
According to a quick sim vented they need very
low tuning to avoid the "one note bass" syndrome.
About 20 Hz and a 7cuft box for both in the sim.
rgds, sreten.
Lol... Im such a noob. Have no idea on what you all are saying in terms of the mapping and specs... guess its why i never replied. Spoke to the owner and ive gotten different answers... one a 8cube tuned for 29.... one a 10cube tuned to 28.... i guess ill just have to play with it... im suggesting to myself to just make a 8 cube maybe 9 with an interchangeable port... a slot port that would bolt in with simple window sealant or such.
I'm with sreten's suggestion. Sealed might be the best way to go with this driver.
A 10 cu.ft. box is pretty large.
SUNDOWN X-15 D2, VB = 51.0 L for 2x drivers in Push-pull Isobaric
F-3 dB ~27.0 Hz for the 51L Sealed (or larger), 1 driver.
1.8ft³ = 50.970L
2ft³ = 56.634L
Now better, since you have 2 drivers and you probably want a small footprint.
Do a "Piggy-back" tunnel load link that you can have both drivers in a (internal enclosure volume - 51 L) sealed speaker and save your space. Important to measure the space between drivers (magnet and cone) to be Half cubic foot sharp because this is going to give the air mass for the calculations to be exact. Always allow for the volume of the drivers counting as extra space because they are very large.
F-3 dB ~22 Hz for the 51L Isobaric Enclosure, 2 drivers.
You can make it 2cft plus the extra space between drivers mentioned of 0.5cft. Push-pull Isobaric below.
(total available space is 2.5ft³ net)
0.5ft³ = 14.158L
I guess the instructions are fairly easy. The orange curve is the modeled response of the 2x drivers in the sub enclosure with car gain.
Hope you like it. Enjoy. Regards. 😀
Both members are right. The sealed version posted before is about right for you, in the car situation. If you make it a little smaller than the 2cft each driver it starts "ringing" but nothing that you can't make it to low volume 1.8ft³ / 51L each.
F-3 dB ~27.0 Hz for the 51L Sealed (or larger), 1 driver.
1.8ft³ = 50.970L
2ft³ = 56.634L
Now better, since you have 2 drivers and you probably want a small footprint.
Do a "Piggy-back" tunnel load link that you can have both drivers in a (internal enclosure volume - 51 L) sealed speaker and save your space. Important to measure the space between drivers (magnet and cone) to be Half cubic foot sharp because this is going to give the air mass for the calculations to be exact. Always allow for the volume of the drivers counting as extra space because they are very large.
F-3 dB ~22 Hz for the 51L Isobaric Enclosure, 2 drivers.
You can make it 2cft plus the extra space between drivers mentioned of 0.5cft. Push-pull Isobaric below.
(total available space is 2.5ft³ net)
0.5ft³ = 14.158L
I guess the instructions are fairly easy. The orange curve is the modeled response of the 2x drivers in the sub enclosure with car gain.
Hope you like it. Enjoy. Regards. 😀
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