JasN00b Posted January 19, 2003 Share Posted January 19, 2003 i need a good sub... on a budget... optimally around the 500 mark and below. i'm not afriad of DUI type things... but i'm NOT an expert wood worker by any means. any sugestions? Quote Link to comment Share on other sites More sharing options...
Dustin B Posted January 19, 2003 Share Posted January 19, 2003 Driving under the influence? I think you meant DIY, or do it yourself. In that case easy call. Adire Audio Tempest, Adire AVA250 or Parts Express 300-794 plate amp. Then follow one of the three plans in this file: http://www.adireaudio.com/Files/VentedTempestApplications.PDF Or copy one of these: http://www.io.com/~patman/sunosub2.html http://dustin.bunnyhug.net/sonostart.php (my sub) Although if this is an option, definately do it instead: http://www.f20.parsimony.net/forum36475/ (note the FAQ and pics links at the top of the page.) Quote Link to comment Share on other sites More sharing options...
JasN00b Posted January 19, 2003 Author Share Posted January 19, 2003 how exactly does that last subwoofer you listed work... would i just put the driver into the wall of my hometheater? (my hometheater was built into a basement, so the back of the driver would be facing out into open space Quote Link to comment Share on other sites More sharing options...
Dustin B Posted January 19, 2003 Share Posted January 19, 2003 It's an infinite baffle. The driver opperates essentially free air but you issolate the front and back waves so they can't cancel each other (two different rooms, room and attic, upstairs room to basement, basement room to upstairs, room to crawl space; just have to be two isolated spaces). To work properly you should have a space for the back side of the driver that is minimum 4x, preferrable 10x or more the combined Vas of the drivers used. The only sub that could possibly have better sound quality would be a dipole. They are also always excursion limited, not power limited. It takes very little power to push a driver to its limits when operated in free air. Also use enough drivers and very few subs could keep up output wise as well. Parts Express has a 15" driver designed for this use. $110 each when 2 or more are bought. Start with two of those and a QSC RMX850 amp ($299; although do some looking as any decent amp that will put out 100W for each driver will be more than enough). Build the manifold to support four. Then when you have the money add two more drivers and you'll be in bass heaven. Quote Link to comment Share on other sites More sharing options...
JasN00b Posted January 20, 2003 Author Share Posted January 20, 2003 how thick would the wall between the two rooms have to be? that idea looks like it might work very nicely for me... *griiiiiin* how many drivers would i need to match up to an SVS CS-Ultra? Quote Link to comment Share on other sites More sharing options...
Dustin B Posted January 20, 2003 Share Posted January 20, 2003 Not entirely sure. But I'd think 2 of the Dayton IB15 or Tempest drivers should be able to give an Ultra a run for its money. You have to consider that an IB is just a very large sealed sub. While the Ultra is a ported one. But best case for the Ultra would be a little over 2.5L of Vd, but the bass reflex design gives it some major help in the lowend down to its tuning point. Using 2 of each, the IB15 would be 4.8L, the Tempest 5.1L and the AV15 would be 7.4L of Vd. The Dayton has a very well suited Qts and is very cheap. The Tempest can be run RDO to get the Qts to a great value and is reasonably priced as well (buying multiple I'm sure you can get price breaks here). The AV15 can't be run RDO so the Qts is a little low. But many people are quite satisfied with an over damped IB so it might not bother you at all (but 2 of these will put you over budget). If you do some used deal hunting, you might find a suitable amp cheap that will bring a 4 driver IB into your budget. Quote Link to comment Share on other sites More sharing options...
prodj101 Posted January 20, 2003 Share Posted January 20, 2003 if you want something to rival the ultra, you could always build a sub out of a tempest and a sonotube. Quote Link to comment Share on other sites More sharing options...
JasN00b Posted January 20, 2003 Author Share Posted January 20, 2003 i'm leaning towards the IB design though.... looks like it'd be cheaper/easier construction Quote Link to comment Share on other sites More sharing options...
prodj101 Posted January 20, 2003 Share Posted January 20, 2003 you know, sonotubes aren't hard either..........basicaly a matter of cutting out 4 circles and a few port holes. Quote Link to comment Share on other sites More sharing options...
Dustin B Posted January 20, 2003 Share Posted January 20, 2003 If you can do an IB, do it. But carefully read the FAQ on that link above and don't hesitate to ask any questions about it. Next to a well designed dipole sub an IB has no equal when it comes to sound quality. And with enough drivers they can be kings of output too. Like I said earlier, if your budget won't allow 4, do two now, but build the manifold to support 4. Then when funds permit buy 2 more drivers if the two you haven't don't put out enough bass for your tastes. Quote Link to comment Share on other sites More sharing options...
JasN00b Posted January 21, 2003 Author Share Posted January 21, 2003 whats a low frequency filter do? Quote Link to comment Share on other sites More sharing options...
Dustin B Posted January 21, 2003 Share Posted January 21, 2003 http://www.hometheaterforum.com/htforum/showthread.php?&postid=523602#post523602 You may find that useful. I think you are asking about what is usually called a subsonic or rumble filter. These are just a high pass filter with a corner frequency that is down very low (usually 16-25hz). These filters roll off the really deep bass protecting a driver from over excursion. Quote Link to comment Share on other sites More sharing options...
JohnA Posted January 21, 2003 Share Posted January 21, 2003 http://www.ctaz.com/~moonlite/subvmp.html Check out these kits. They will do what you want. Quote Link to comment Share on other sites More sharing options...
justin_tx_16 Posted January 21, 2003 Share Posted January 21, 2003 I am building two sonosubs. 24x36" sonotubes were $30 each solid wood round caps were $18 pair (26 inch) Shiva 12's (2) totally $250 Amps (PE 250 Watt) (price for two) $240 two 4" ports $12 each That goes to 60+36+250+240+24=$610 for TWO sonosubs! That is a ton of output! You can do just 1 sonosub for... well half that price. Quote Link to comment Share on other sites More sharing options...
Invidiosulus Posted January 21, 2003 Share Posted January 21, 2003 Those vmps sound really nice if I remember right. Peace, Josh Quote Link to comment Share on other sites More sharing options...
michael hurd Posted January 22, 2003 Share Posted January 22, 2003 yummy, yummy. Check out the pictures of the tumult.http://www.creativesound.ca/images/product/tumult.html Quote Link to comment Share on other sites More sharing options...
JasN00b Posted January 22, 2003 Author Share Posted January 22, 2003 i didnt relize sonosubs were so cheap justin. how soon will you be done to post some readings on thier preformance? Quote Link to comment Share on other sites More sharing options...
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