looking to build some subs for my ht - AVS Forum
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post #1 of 59 Old 09-24-2011, 02:02 PM - Thread Starter
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im looking to build a pair of 12" subs for my mid sized room and looking for a pair of drivers that are under $300 for the pair

i found these http://www.sonicelectronix.com/item_...-EVW-3000.html wired in series would give me 4ohms each but with lack of info on them i thought id ask here first the only amp i have right now is the one out of my pa-120 so i will also need another amp or pair of amps

i will be using them for 40% HT 40% Music and 20% video games

please point me in the right direction
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post #2 of 59 Old 09-24-2011, 02:23 PM
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Sorry. Are you doing the actual building or are you asking someone to do the labor?


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post #3 of 59 Old 09-24-2011, 02:28 PM
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What are the T/S specs for the driver?
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post #4 of 59 Old 09-24-2011, 02:32 PM
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Sorry, Misread the title. Good luck with the build.


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post #5 of 59 Old 09-24-2011, 02:59 PM - Thread Starter
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Quote:
Originally Posted by A9X-308 View Post

What are the T/S specs for the driver?

i have zero idea i couldnt find anywhere
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post #6 of 59 Old 09-24-2011, 03:09 PM
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Quote:
Originally Posted by squish72 View Post

i have zero idea i couldnt find anywhere

Well how do you expect to design a sub?
Slap some drivers in a box and hope for the best.
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post #7 of 59 Old 09-24-2011, 03:43 PM - Thread Starter
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yep
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post #8 of 59 Old 09-24-2011, 05:15 PM
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Why not just stick with a proven HT Subwoofer like Dayton or similar.
PE has some specials at the moment.
What are you size restrictions? Could you go up to a 15" driver?
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post #9 of 59 Old 09-24-2011, 08:22 PM
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"yep"

shoot for 3 cubic feet per driver. the thing that i like most about your approach is that with no standard, it will be impossible to fail.

Listen. It's All Good.
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post #10 of 59 Old 09-24-2011, 09:34 PM - Thread Starter
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well its been a long time since i have built speaker boxes so i wanted to give it a shot again and ive used some software to tune the box a long time ago and cant remember how to use it anymore.

i was happy with my pa-120 but found it bottoming out on some blurays so i decided to try installing one of my ma audio subs i had and it made a big improvement lower freq. but now i have port noise instead of the sub rattling
so im looking to improve that

space is not an issue since its spare room i turned in to a theater room only and i will take performance over looks anyday
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post #11 of 59 Old 09-25-2011, 12:03 AM
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hey squish, like alpha-niner suggested, you need to dig up the thiele/small parameters, otherwise you won't really have any idea of what you have there.

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post #12 of 59 Old 09-25-2011, 02:57 AM - Thread Starter
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yeah im not dead set on those they just looked beefy for the price
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post #13 of 59 Old 09-25-2011, 03:42 AM
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Quote:
Originally Posted by squish72 View Post

yeah im not dead set on those they just looked beefy for the price

Looks good seldoms actually means good. Surround looked small to me so maybe small Xmax and being a car driver Fs could be high.
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post #14 of 59 Old 09-25-2011, 12:27 PM - Thread Starter
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agreed

so should i look into bigger subs? Also should I run one good one @ my price point or a pair at lower prices?

would this be a good sub to run? http://www.edesignaudio.com/product_...roducts_id=554
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post #15 of 59 Old 09-25-2011, 12:39 PM
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Quote:
Originally Posted by squish72 View Post

agreed

so should i look into bigger subs? Also should I run one good one @ my price point or a pair at lower prices?

would this be a good sub to run? http://www.edesignaudio.com/product_...roducts_id=554

Two or more give flexibility of placement and can help with averaging out room modes.

A sub is an air pump so larger cone = more cone area (bore) and longer Xmax (stroke) create a larger volume displacement (bore x stroke). So larger driver(s) can give more output or be cleaner due to having to use less of the Xmax (distortion is generally proportional to excursion for a given driver). You can always turn t down, but you can't go above it's limits.

No knowledge of that ED driver s I'll let someone else comment.
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post #16 of 59 Old 09-25-2011, 12:42 PM - Thread Starter
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i appreciate all the help your giving me on this
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post #17 of 59 Old 09-26-2011, 10:16 AM - Thread Starter
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post #18 of 59 Old 09-26-2011, 01:20 PM
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Yes.
Two other options for a single driver within your $300 budget.
http://www.istonline.ca/mach5_ixl_15.html
http://www.istonline.ca/mach5_ixl_18.html

As you have now exceeded your original budget for a pair of drivers, and a pair of subs is always better than one, buy one driver an build 2 boxes. Add the amp mentioned in post 1 and the other driver as budget allows.

For max sub performance, do the above, but in the short term don't build the PA120 amp into the new sub, just use it as a stand alone. Assemble all the bits for a pair of new subs over time and when completed, return the PA120 amp to the original sub and use that as a third enclosure. Or sell the PA120 sub complete.

As I have no idea what size box you can use, there is a quick sim of the Dayton, IXL15 and IXL18 in a Q-0.707 sealed box each with 600W.

Dayton is 150L net, IXL15 35L net and the IXL18 90l net or roughly 5/1.2/3 cf.

I haven't bothered with ported because I dunno the size limits, but I'm not wanting to sim a whole bunch of stuff. Narrow it down and I'll try a few, or better still learn how to do it yourself.
LL
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post #19 of 59 Old 09-26-2011, 02:17 PM - Thread Starter
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heres some measurements my room is 12.5x12.5 and has doors closing it off. there is no room by the tv to place the subs due to the way the doors swing. my couch is 2.5ft away from the back wall and thats where id have to place the sub/subs. so box size is not really an issue

id like to stay as cheap as i can but at the same time i know if you buy cheap you buy twice

would my current sub be ok to pair with a different sub or would it be best to have identical pairs?
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post #20 of 59 Old 09-26-2011, 03:46 PM
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Quote:
Originally Posted by squish72 View Post

heres some measurements my room is 12.5x12.5 and has doors closing it off. there is no room by the tv to place the subs due to the way the doors swing. my couch is 2.5ft away from the back wall and thats where id have to place the sub/subs. so box size is not really an issue

Just to clarify, 2.5' deep space behind 2/3 (?) seater couch, up to say top of couch back (3'?).

If so, what about one of these with the IXL18? Use your existing amp.

One of these I'm sure will be more than enough for a room of your size.

Also do a search here for Easy Button. There are some variants, but check the drivers are still available.

Quote:
Originally Posted by squish72 View Post

id like to stay as cheap as i can but at the same time i know if you buy cheap you buy twice

True.

Quote:
Originally Posted by squish72 View Post

would my current sub be ok to pair with a different sub or would it be best to have identical pairs?

Depends who you ask, as there are proponents for identical and different and there are arguments for either. Both I'm sure can be made to work well.
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post #21 of 59 Old 09-26-2011, 04:01 PM - Thread Starter
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yep couch is a 3ft tall and sits 3

is there anywhere else to buy that sub? i see its out of stock

that box looks great and easy too so i think i will go this route
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post #22 of 59 Old 09-27-2011, 07:27 AM - Thread Starter
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Also is there anything else I would need to buy for it it? I see a lot of talk about ss filters should I use one?
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post #23 of 59 Old 09-27-2011, 10:32 AM
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First off, with your budget I recommend either Dayton Reference series subwoofers or Acoustic elegance subs. AE are a lot more expensive but can play really high frequency for a subwoofer.

I strongly advise you against the Titanic MK subwoofers if you are listening to music. I have used them in car audio and they are really boomy. They can't be beat in total output, but I feel the reference series are much more dynamic, and all around better sounding subwoofers. Go to diyma.com/forums; they did a kippel test of the Dayton reference 10" HO subwoofer and the performance is stellar.

Second, I can't see why you would want (2) subs in a room that small. Well, I can see why you want two, but I can assure you (1) sub properly sized to a custom box will make the fillings in your teeth hurt. Especially if its (2) feet behind your kidneys (behind couch?) .

So for $150 delivered, I recommend this. Its the Dayton 15" Reference subwoofer. Since you have oodles of room behind your couch, build a 5 cu.ft. box tuned to 15-20hz and get either an O-Audio 500w plate amp or a Dayton 500w plate amp. I can model this for you if you like when I get home; I just took the recommended box size from the Parts Express recommended box thread.

So with the Dayton 15" HF ($150), a 500w plate amp ($220 approx), and a custom box ($32 MDF (cut to size at Home Depot), wood glue ($5), screws ($10, a 4"-5" diameter (port tubing either at home depot or pro-port from parts express) $20, you can have a world class bass experience for:

($150 + $220 + $32 + $5 + $10 + $20) = $437 approx.

Thats what I would do. Hope that helps. Your neighbors will despise you.
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post #24 of 59 Old 09-27-2011, 11:30 AM - Thread Starter
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i do like those prices better but can it go close to as low as the 18?
and could i use my 650w amp from my pa-120 for now?

the house i live in is really old and has really thin walls and it does not seem to be very good acusticly so i was looking to try and overcome that with a better sub

if im going about it the wrong way let me know

im very greatfull of the help you guys have given me
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post #25 of 59 Old 09-27-2011, 01:41 PM
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Well you're the first man I know who a ported 15" sub 2' from his chest in a 12x12 room may not be enough bass for. Impressive. I'm speechless and don't know what to say. I think a priest can help you more than I can....
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post #26 of 59 Old 09-27-2011, 02:07 PM - Thread Starter
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My current sub is great for 80% of the stuff I want to listen to but a lot of the new blurays have such low bass that my sub falls on its face and id like to improve on that.
Mainly want cleanner bass you can feel, if that makes sense.

Found out the Ixl18s are no longer available as a dual 2ohm voice coil but they can build one off dual 1 ohm ones for the same price. Says they are revising them and will be much more expensive
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post #27 of 59 Old 09-27-2011, 02:15 PM - Thread Starter
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Also the couch is 3ft away from the right wall and the sub sits in the corner, so from the main seat (center of the couch) the sub is 6 1/2 ft away and that's the best spot I could find acusticly for it
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post #28 of 59 Old 09-27-2011, 03:33 PM
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If thats the case, the bigger the better. Go with an 18" if you have the money. A single 18", sealed in a big enough box you can manage will hit any frequency a normal human can perceive in a 12x12 room.
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post #29 of 59 Old 09-27-2011, 04:18 PM - Thread Starter
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so what should be my next step since the im not sure i like the idea of dual 1 ohm voice coils and after reading some horror stories about shipping from canada i might pass on the ixl unless theres not a compairable driver
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post #30 of 59 Old 09-27-2011, 08:56 PM - Thread Starter
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ended up ordering the dayton 15 hf and i ordered a flared 4" port too just in case
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