Recommendations for Subwoofer DIY, Budget $700.00 - AVS Forum
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post #1 of 40 Old 11-22-2011, 08:05 AM - Thread Starter
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Hi,

I have a Large room which is divided in Game area and Home Theater area, no dividing walls. Total room is about 3500 cubic ft ( 35l x 15w x 8h).

My mains are Definitive Technology BP-8020ST with SR-8040BP surrounds and CS-8040HD Center.

I want to have a Subwoofer for the low end.. and wishfully a flat room shaking bass

I can go DIY or buy a ready made. I would appreciate some good suggestions.

Thanks,
Andrew
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post #2 of 40 Old 11-22-2011, 07:00 PM
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the constraints tend to be cost and size.

if you don't have any constraints, notnyt, bosso, warpdrv, and ricci have some good builds, but that is kind of the deep end of the pool. :-)

if you have some cost and size restraints, kick them in and it will be easier to guide you into a solution.

edit: sometimes i have too many browsers open. for $700, get four dvc drivers or hf390's and an ep4000 amp. build sealed and fire them up. yeah, a little over budget, but who cares about deficits? :-)

one of the new mach 5 pi18's and an amp could work too.

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post #3 of 40 Old 11-22-2011, 08:38 PM
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Quote:
Originally Posted by reg.mem View Post

Hi,

I have a Large room which is divided in Game area and Home Theater area, no dividing walls. Total room is about 3500 cubic ft ( 35l x 15w x 8h).

My mains are Definitive Technology BP-8020ST with SR-8040BP surrounds and CS-8040HD Center.

I want to have a Subwoofer for the low end.. and wishfully a flat room shaking bass

I can go DIY or buy a ready made. I would appreciate some good suggestions.

Thanks,
Andrew

Two sealed SSD 18's and a Behringer EP4000 from Ebay should get you really close to $700. I think you will be hard pressed to find better displacement for the $ sealed w that budget. That should outperform 3 Dayton's which would be similar price of two SSD 18's and take up the same cabinet space. An extra $200-$500 in the budget would likely give you a different recommendation (Pi-18, Fi Q18, and Marathon 5050/Lab clone amp, would be upgrades but then you need to look to upgrade your power supply and add DSP and so on and so on way over budget)

If you have space you could port a Pi-18 to 15hz in 10cu and get a little better output from 12-30hz theoretically.
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post #4 of 40 Old 11-23-2011, 11:22 AM - Thread Starter
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Quote:
Originally Posted by LTD02 View Post

the constraints tend to be cost and size.

if you don't have any constraints, notnyt, bosso, warpdrv, and ricci have some good builds, but that is kind of the deep end of the pool. :-)

if you have some cost and size restraints, kick them in and it will be easier to guide you into a solution.

edit: sometimes i have too many browsers open. for $700, get four dvc drivers or hf390's and an ep4000 amp. build sealed and fire them up. yeah, a little over budget, but who cares about deficits? :-)

one of the new mach 5 pi18's and an amp could work too.

So I guess my first post was a bit noobish.

My size constraints are ~ 5 CU FT for single box or
I could go dual box which are ~ 2.5 cu ft ( good WAF since I can maintain symmetrical placement in the room )

Can a subwoofer be placed horizontally? ( tall design but laid flat on ground ) I can probably manage that.

Any reviews feedback on ED 13AV.2 ? Linky They are on sale right now

Glad about the suggestions and still "greedy" for more options/advises.



Thanks,
Andrew
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post #5 of 40 Old 11-23-2011, 01:21 PM
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Quote:
Originally Posted by reg.mem View Post

So I guess my first post was a bit noobish.

My size constraints are ~ 5 CU FT for single box or
I could go dual box which are ~ 2.5 cu ft ( good WAF since I can maintain symmetrical placement in the room )

Can a subwoofer be placed horizontally? ( tall design but laid flat on ground ) I can probably manage that.

Any reviews feedback on ED 13AV.2 ? Linky They are on sale right now

Glad about the suggestions and still "greedy" for more options/advises.



Thanks,
Andrew

I had two 13av.2's and I liked them as far as sound quality goes and size constraints but they weren't enough output in my room. I opted to have mine made into 18's to improve output if that tells you anything. You would get similar output from one Fi Q 18 for nearly half the price and same size box as 2 13av.2. For $500 and a smaller box you could go with the Mach Pi-18 (still cheaper than the 13av.2 w better output)
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post #6 of 40 Old 11-23-2011, 04:58 PM
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"So I guess my first post was a bit noobish."

not as bad as my inability to read. :-)

as was just said, in a 4-5 cube box, the pi18 is a good one.

another option that works with your form factor is two 2-2.5 cubic footers loaded with alpine swr-1243 drivers. the klippel report on them suggests that they should sound pretty good and certainly better than you might expect from what has traditionally been a car audio sub family.

swr1243d's are only...$133 but you might find them for less.



here is the pi18 and 2 x 1243d's in 5 cubes total (you could split up the 1243d's)

the 1243's run out of excursion sooner than the giant pi18, but otherwise they will have about the sensitivity. here is MAX spl.
LL

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post #7 of 40 Old 11-23-2011, 06:55 PM
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cartoys.com has it for $120 free shipping and theyre actually authorized. nutty price

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post #8 of 40 Old 11-23-2011, 07:57 PM
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that's getting pretty budget friendly omega.

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post #9 of 40 Old 11-24-2011, 07:19 AM
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Run 4 at that price. That should even the score with the 18"


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post #10 of 40 Old 11-24-2011, 02:34 PM - Thread Starter
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Quote:
Originally Posted by LTD02 View Post

"So I guess my first post was a bit noobish."

not as bad as my inability to read. :-)

as was just said, in a 4-5 cube box, the pi18 is a good one.

another option that works with your form factor is two 2-2.5 cubic footers loaded with alpine swr-1243 drivers. the klippel report on them suggests that they should sound pretty good and certainly better than you might expect from what has traditionally been a car audio sub family.

swr1243d's are only...$133 but you might find them for less.



here is the pi18 and 2 x 1243d's in 5 cubes total (you could split up the 1243d's)

the 1243's run out of excursion sooner than the giant pi18, but otherwise they will have about the sensitivity. here is MAX spl.

Great suggestions, I would look into the 1243D's.

I just came across the Klipsch Reference Subwoofer
http://www.newegg.com/Product/Produc...82E16882780078

As of writing this post, the price on it is at $299 each. I am quiet swayed towards getting 2 of these and.

Anybody have experience with Klipsch Reference RW-12d 12" ? and how would it be with twins of those :-)

Thanks,

Andrew
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post #11 of 40 Old 11-24-2011, 05:17 PM
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I had an RW-12d. It was ok, got loud and that's about it. In the lower freqs there would be a bit of port noise and the cheap plastic port world "creak" a bit. The driver was ts measured and the stock cabinet is way too small. Rebuild cabs about twice the volume and throw the drivers in and you'll have a real winner. Someone else on the forum did that and mentioned they went toe to toe with some of SVSs big boys. Long throw aluminum cone 12 and 300 watt bash amp for $300. You could do the same from PE unless you plan on using the stock cabinets.

Dan
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post #12 of 40 Old 11-24-2011, 08:17 PM - Thread Starter
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I had an RW-12d. It was ok, got loud and that's about it. In the lower freqs there would be a bit of port noise and the cheap plastic port world "creak" a bit. The driver was ts measured and the stock cabinet is way too small. Rebuild cabs about twice the volume and throw the drivers in and you'll have a real winner. Someone else on the forum did that and mentioned they went toe to toe with some of SVSs big boys. Long throw aluminum cone 12 and 300 watt bash amp for $300. You could do the same from PE unless you plan on using the stock cabinets.

Dan

You could do the same from PE.. I do not understand the term "PE", could you elaborate ?
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post #13 of 40 Old 11-24-2011, 08:23 PM
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parts express...a supplier of components for diy folks.

http://www.parts-express.com/

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post #14 of 40 Old 11-24-2011, 08:34 PM - Thread Starter
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parts express...a supplier of components for diy folks.

http://www.parts-express.com/

Duh !! me .. Yeah ofcourse I know Parts express :-)

I am also looking into deals with Outlaw Audio.. they have a super secret Black friday sale starting at 12:01 AM EST..

So are 2 LFM-1 EX good to give me the "low" ?
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"So are 2 LFM-1 EX good to give me the "low" ?"

sounds like a marketing question in a science/engineering forum.

what spl at what hz in what room with what amp do you mean "low"?

if they do what you need great, if not, then not.

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post #16 of 40 Old 11-24-2011, 09:15 PM - Thread Starter
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"So are 2 LFM-1 EX good to give me the "low" ?"

sounds like a marketing question in a science/engineering forum.

what spl at what hz in what room with what amp do you mean "low"?

if they do what you need great, if not, then not.

Yeah I guess it is some what that kind of questions. After 35 years of fascination with Hi Fidelity music systems I have finally come to a stage where I can really own something of my own and so trying to understand standards etc.

My room is 3500 Cu Ft, where one half is dedicated to HT and another half to Rec Room with NO walls between the two. I want decent SPL in my listening area so as to enjoy the movies and the music to fullest.

At this juncture I am unsure if 98 Db at 22 Hz is good SPL or is 100 Db at 33 Hz ( with respect to experiencing movies / music ) so my statement was vague as in "Low".

The veterans (like you) of this forum might be able to give some more insight
into it.

Thanks,
Andrew
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post #17 of 40 Old 11-24-2011, 09:21 PM
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are you the kind of guy who likes to "blast it" or just play music and movies at modest levels?

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post #18 of 40 Old 11-24-2011, 09:23 PM - Thread Starter
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are you the kind of guy who likes to "blast it" or just play music and movies at modest levels?

I can be on the edge of modesty.. but not quite "blasting" it :-)
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I can be on the edge of modesty.. but not quite "blasting" it :-)

I like to feel the punch of the bass drums.. and rumble of Cellos and Bass guitar..
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what mains are you running?

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post #21 of 40 Old 11-24-2011, 09:31 PM - Thread Starter
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what mains are you running?

My mains are Definitive Technology BP-8020ST with SR-8040BP surrounds and CS-8040HD Center.
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post #22 of 40 Old 11-24-2011, 09:51 PM
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Not that my vote counts, but I still say if you can fit two 4cu ft cabinets then go with 2 FiCar SSD 18's. You're looking at 112db at 20hz with that set up before room gain. That should get you better performance than any commercial offerings for around $700 w EP4000.
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post #23 of 40 Old 11-24-2011, 10:03 PM
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the "built in" sub in your mains is no where near what you want be. d.t. is a marketing company and imho doesn't engineer for what you want.

i may have to put my flame suit on, but if i were to just pick a system that would make you most happy, i'd look at a pair of aespeakers td18h drivers in 8 cubic foot ported cabs tuned to around 20hz or so and powered with a low cost amp, such as the ep2500/4000.

that will give you super clean bass from about 20hz up at 120db or more in room. it might be a little over your budget, but you won't regret it. it is a performance system. it is not a toy system, but something that you might find in a world class mastering studio.

the fi speaks are fine but they never return my emails when i ask about inductance and that is a problem for music detail the higher in frequency that you go.

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post #24 of 40 Old 11-24-2011, 11:01 PM
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Quote:
Originally Posted by LTD02 View Post

"So I guess my first post was a bit noobish."

not as bad as my inability to read. :-)

as was just said, in a 4-5 cube box, the pi18 is a good one.

another option that works with your form factor is two 2-2.5 cubic footers loaded with alpine swr-1243 drivers. the klippel report on them suggests that they should sound pretty good and certainly better than you might expect from what has traditionally been a car audio sub family.

swr1243d's are only...$133 but you might find them for less.



here is the pi18 and 2 x 1243d's in 5 cubes total (you could split up the 1243d's)

the 1243's run out of excursion sooner than the giant pi18, but otherwise they will have about the sensitivity. here is MAX spl.

wow wait.. $240 worth of alpine 12s will be fairly equal to a pi18? wuuuh?!!?

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post #25 of 40 Old 11-25-2011, 06:21 PM
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where are the thiele small specs for the FiCar SSD 18 w/copper coil?

i couldn't find them on the site.

"wow wait.. $240 worth of alpine 12s will be fairly equal to a pi18? wuuuh?!!?"

i wouldn't put it that way. two twelves have about the radiating area as one 18 and the two 12's are rated for 1/2 as much power as the 18 per driver, so in the power limited region, they will be quite similar. the 18 has more excursion, so dominates the lower end where excursion limits the 12's.

if you went with 4 twelves like ricci suggested, that would be a pretty "fair fight".

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post #26 of 40 Old 11-25-2011, 07:06 PM
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in a 4 cu ft box does the pi18 even get enough power from an ep4000? isnt an ma5050 needed

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post #27 of 40 Old 11-25-2011, 07:55 PM
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iirc the pi18 is rated for 1200 watts, though like most home audio subs, the testing conditions aren't provided. it can probably take 2000 peak, but i'm not sure you'd want to go higher for any extended period of time.

my concern is that he mentioned a large room and these sealed options just rolloff too soon imho.

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post #28 of 40 Old 11-26-2011, 09:06 AM
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Ported options simply do not get talked about enough on this forum anymore. To backup LTD, twin 15's or even twin 18's ported to 18-20hz with a kW or so of power will put a frown on most wives' faces...and that means a smile on ours.

Twin TD18's + amp pushes the budget, but, twin Alpines + ep4000 comes in under budget and allows room to upgrade if two more drivers are required. I'd have to model them, but I'm sure they'd work fine ported tuned to around that 18-20hz area.

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post #29 of 40 Old 11-26-2011, 04:54 PM
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the only caveat is that the alpines don't have the motor strength of the td18, so won't sound quite as clean in a ported application or any resonant application for that matter.

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post #30 of 40 Old 11-26-2011, 05:45 PM
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But being that they have about half the cone area of the 18, they don't need to have a motor of the same strength. Two drivers combined equals the same Sd as the td, so you can effectively add the bl.

I forgot the specs, but isn't their cms under .5?

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