hello I have (4) P2D48 8" subwoofers that I am interested in building an enclosure for. I have extensive old school design of enclosures that include 4th,5th, and 6th order enclosures. I want to build somthing new and exciting. Any ideas? I will install the enclosure in my Gmc Envoy, so size is a big deal. I have thought of building the slot vent enclosure recommended by manf. it seems boring to me. Thanks and the website is awesome! Gene in brrrr AK907
Replies (8)
ttocs on 01/4/2009 08:51:20
4 - 8s, a man with taste as good as my own! I am just running them in a sealed enclosure myself but I love to suprise people when they think they are bigger.
How much power are you going to throw at them?
Ash on 01/4/2009 09:10:02
Welcome to CK! Four 8's are a good choice when opting for multiple subs. With the specs of those I say it would be hard to beat going ported which will net a F3hz in the 30's. Ideal for an suv if you got enough room for the 2.6 ft^3 box. If not then stick with the manufacturer recommended sealed which is in the micro box range.
I don't know of any design that will gain better than the ported with those subs. Also consider that their xmax is a bit limited (8mm) even though 4 of them will pump some air. A ported box will help greatly in that area as you use a SSF. I'd give a full 800 rms @ 2 ohms which should be easy to find an amp in range.
Most of the times simplest is best.
Ash,
newB on 01/5/2009 02:30:02
Kerfed Transmission Line GRIN
-Drew
Victor on 01/5/2009 02:56:18
u want SQ or SPL out of these 4 x 8" ers ???
SQ go sealed ...
SPL Horn loaded 4th order bandpass .....
For this you could stack up 2 Wicked ones ...
http://www.decware.com/whorn.htm
http://www.decware.com/whornok.htm
complex... but I can surely assure you it works cause I have built one.. and am building another, this time with FRP ...
Victor...
eta1091 on 01/5/2009 15:37:05
The spl horn 4th order looks to be the enclosure i want to build. Thank you for the responses. Victor, can you help in dimensions? the size isnt restricted for my application. IThanks again
Victor on 01/5/2009 22:23:13
it is a pretty simple geometric layout for a horn...and this one is pretty effective too...
you can do this enclosure
1 - 36" x 24" x ( variable height/depth )
2 - 36" x 36" x ( variable height/depth )
6" , 8", 10" do very good in these enclosures, with 12 & 15's the enclosure becomes too huge to fit in a car.
since you have 8" drivers ...
the 36" x 24" x 20" ( for 2 x 8" subs on each side )
meaning all the 4 subs will go in a single enclosure ...
now that becomes a huge box by the way ... 10 cu.ft
here is one mad guy who did an enclosure for 8 x 10" subs in that design..
you will get an idea of what i meant to say by 36 x 24 x 20 ..
http://www.decware.com/cgi-bin/yabb22/YaBB.pl?num=1200843494
hope this helps....
Victor...
eta1091 on 01/6/2009 00:47:02
Victor
Thanks for the input. that box looks insane. how did it turn out? How wide do i make the ports? or am i missing somthing? thanks again.
Victor on 01/6/2009 00:55:52
wide .. ports... ????
this is a self adjusting design.. the horn is actually a port ... you don't need any other ports for this enclosure design...
and if done right.. this enclosure makes even the simplest sub sound extra ordinary ...
Victor...
PS: Did you go through the links above and see the design and construction process of this enclosure... ???
Replies (8)
ttocs on 01/4/2009 08:51:20
4 - 8s, a man with taste as good as my own! I am just running them in a sealed enclosure myself but I love to suprise people when they think they are bigger.
How much power are you going to throw at them?
Ash on 01/4/2009 09:10:02
Welcome to CK! Four 8's are a good choice when opting for multiple subs. With the specs of those I say it would be hard to beat going ported which will net a F3hz in the 30's. Ideal for an suv if you got enough room for the 2.6 ft^3 box. If not then stick with the manufacturer recommended sealed which is in the micro box range.
I don't know of any design that will gain better than the ported with those subs. Also consider that their xmax is a bit limited (8mm) even though 4 of them will pump some air. A ported box will help greatly in that area as you use a SSF. I'd give a full 800 rms @ 2 ohms which should be easy to find an amp in range.
Most of the times simplest is best.
Ash,
newB on 01/5/2009 02:30:02
Kerfed Transmission Line GRIN
-Drew
Victor on 01/5/2009 02:56:18
u want SQ or SPL out of these 4 x 8" ers ???
SQ go sealed ...
SPL Horn loaded 4th order bandpass .....
For this you could stack up 2 Wicked ones ...
http://www.decware.com/whorn.htm
http://www.decware.com/whornok.htm
complex... but I can surely assure you it works cause I have built one.. and am building another, this time with FRP ...
Victor...
eta1091 on 01/5/2009 15:37:05
The spl horn 4th order looks to be the enclosure i want to build. Thank you for the responses. Victor, can you help in dimensions? the size isnt restricted for my application. IThanks again
Victor on 01/5/2009 22:23:13
it is a pretty simple geometric layout for a horn...and this one is pretty effective too...
you can do this enclosure
1 - 36" x 24" x ( variable height/depth )
2 - 36" x 36" x ( variable height/depth )
6" , 8", 10" do very good in these enclosures, with 12 & 15's the enclosure becomes too huge to fit in a car.
since you have 8" drivers ...
the 36" x 24" x 20" ( for 2 x 8" subs on each side )
meaning all the 4 subs will go in a single enclosure ...
now that becomes a huge box by the way ... 10 cu.ft
here is one mad guy who did an enclosure for 8 x 10" subs in that design..
you will get an idea of what i meant to say by 36 x 24 x 20 ..
http://www.decware.com/cgi-bin/yabb22/YaBB.pl?num=1200843494
hope this helps....
Victor...
eta1091 on 01/6/2009 00:47:02
Victor
Thanks for the input. that box looks insane. how did it turn out? How wide do i make the ports? or am i missing somthing? thanks again.
Victor on 01/6/2009 00:55:52
wide .. ports... ????
this is a self adjusting design.. the horn is actually a port ... you don't need any other ports for this enclosure design...
and if done right.. this enclosure makes even the simplest sub sound extra ordinary ...
Victor...
PS: Did you go through the links above and see the design and construction process of this enclosure... ???
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