[Audiophile34]

Hey guys, I got a hopefully easy question. A buddy of mine stopped by today, and was completely surprised buy my dual opposed build. He is kinda a yuppy, and thought that sound couldn't get any better than his Bose set up.. Needless to say my combination of onkyo,paradigm,Cambridge,and DIY made him reconsider this Veiw point.


He is now tossing the idea around of having me build him a new sub set up. He doesn't want 15's due to his wife's opinion that 15's are to big, but she has no problem with 12's.


Now his idea is this, if we could come up with a design that houses 4 12's but only two can be seen. I know a design like that wouldn't be small, especially since he would prefer the sound of a ported enclosure, (he is mostly a rap, hip hop listener). But if we encorporated the design into a tv stand, or ottoman, that would be doable wouldn't it?


And if we decided to go with 12's, which drivers out there offer the most bang (boom) for your buck??


Thanks guys for everything... And if anyone has any ideas how to put 4 12's in one box and make it all work, I am definatly open to suggestions...

 

[CZ Eddie]

How come nobody ever lists a budget or room size or if they need amps or not and how big the enclosures can be?

There should really be a sticky mandating this info.

 

[LTD02]

if that is what he likes, then how about a little spl subwoofer tuned for hip hop?


a 2 cubic foot enclosure, ported to 37hz (4 inch diameter port, 9 inches long), with an alpine 12 swr-1243d will hit 118db at 40-50hz with 500 watts.

 

[LTD02]

slot port would be better, but it depends on the form factor of your enclosure as to the dimensions.

 

[Audiophile34]

large room, which is why he was leaning towards 4 twelves.

I think he would like to keep it economy budgeted, say less than 750 (guess)

thinking plate amp....


I am sorry I did not list final demensions, but in the tv stand idea was thinking 72"*24*24 ish...

 

[Audiophile34]

So what's a good 12 inch driver, for a vented configuration? Not looking for top of the line, more on the level of best price performance ratio....

 

[tgse3]

The TC Sounds Epic 12 models well in 3.5cu ft tuned to 22-25hz w 800watts per driver. Should hit 125db+ @25hz and up with 4 of these. Problem may be getting stock on these drivers and they're just a touch over your budget for 4.

Four Dayton HO 12 in 9 cu gets you nearly flat to tuning 23hz with 1800 watts and 120db+ @ 25hz and up.

 

[Mpray1983]



Quote:
Originally Posted by tgse3 /forum/post/0


The TC Sounds Epic 12 models well in 3.5cu ft tuned to 22-25hz w 800watts per driver. Should hit 125db+ @25hz and up with 4 of these. Problem may be getting stock on these drivers and they're just a touch over your budget for 4.

Four Dayton HO 12 in 9 cu gets you nearly flat to tuning 23hz with 1800 watts and 120db+ @ 25hz and up.

I was gonna say TC sounds epic in 4cf dual opposed with one ep4000 running each box. If he paid for Bose he can pay for this. Just have him sell the Bose on craigslist...his yuppy friends will eat it up

 

[flyng_fool]



Quote:
Originally Posted by Mpray1983 /forum/post/20793620


I was gonna say TC sounds epic in 4cf dual opposed with one ep4000 running each box. If he paid for Bose he can pay for this. Just have him sell the Bose on craigslist...his yuppy friends will eat it up

Have an EP4000 run two boxes, one channel per sub. Then he'd only need two amps and he'd have more flexibility with placement because none of his subs would need to be by a plug.

 

[Mpray1983]



Quote:
Originally Posted by flyng_fool /forum/post/0


Have an EP4000 run two boxes, one channel per sub. Then he'd only need two amps and he'd have more flexibility with placement because none of his subs would need to be by a plug.

I'm trying to maximize power and space, since the ep4000 only gives out 450 watts at 8 ohms per channel. If we use 1 per enclosure we can use 633 watts per speaker by using two sets of binding posts. If you use one ep4000 then you are only sending 225-250 watts per sub. From what I know about TC sounds is that they are power hungry. I'm sure you could use an ep4000 for all 4 tho.

 

[DS-21]

As for how to do it SVS had a sub that is similar to what you're thinking.

http://www.hometheaterhifi.com/volum...er-9-2003.html


Neat design, but a decidedly non-optimal use of four woofers. Much better to separate them and use them to smooth room modes.

 

[vitod]

How about 4 of lilmike's Anarchy subs. I know there not 12' buy your fiend can hide them much easier and get decent output.

 

[Mpray1983]

Honestly if your friend is coming from Bose...then two TC sounds epics in separate boxes 2cf each and a 500 watt plate amp on each would be the best option for him in terms of SQ, size, power and keeping it simple.

 

[LTD02]

"So what's a good 12 inch driver"


for hip hop bass, you really want big 40-50hz. the alpine driver that i suggested actually does quite well for that application in the ported enclosure shown. the 6db peak is equal to having 4 drivers instead of one. the driver costs about $125 or so. that is not a driver/enclosure/tuning that i would suggest for just about anything else, but here it seems like the bang for the buck and bang for the size winner.

 

[Audiophile34]

Can you slot port that enclosure you modeled Lt?


I think if I where to build him two of those he would be tickled...


Maybe just combine two boxes into one, and make it an tv stand....

 

[LTD02]

"Can you slot port that enclosure you modeled Lt?"


you sure can. the dimension of the slot depend on the dimensions of the enclosure.

 

[Th3_uN1Qu3]

For hiphop you're gonna want at least a 30Hz tuning, if not lower. Otherwise it'll simply drop off on the lower notes. That's the difference between a system that is just loud, and a system that is bangin'.

 

[LTD02]

"For hiphop you're gonna want at least a 30Hz tuning, if not lower. Otherwise it'll simply drop off on the lower notes."


this isn't right. the bass line in almost all hip hop runs around 40-50hz. 30hz is really, really low for music. bass mechanik type stuff. but i figured that he would want some good rumble for movies once he gets it all hooked up, so i split the difference between a movie subwoofer and an spl subwoofer and created this:

the picture isn't to scale...hey, i mocked it with microsoft word after all.

 

[LTD02]

here is an example of the spectral content of hip hop. in this case, al kapone - the music

http://www.youtube.com/watch?v=hBo8KGWxxVE


you can see that the peak energy is right on 40hz, which is typical of this kind of music.

 

[LTD02]

and another, this time eminem - lose yourself.

http://www.youtube.com/watch?v=1TADyXC2K0g&feature=fvst


lower end of the bass energy here is around 38hz.