Help me build beastly party sub. $650 budget.

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#21
Hi bo...,

For a loud - and nice sounding - party box put 4ea. JBL GTO1214D into a bass reflex box: V_net=250 L - 2 ducts 6"Dia. x 15" long. The drivers are about $100.-- ea. on ebay (free shipping), MDF would be fine for box material, throw in a few 1x1s for bracing and corners, some miscellaneous stuff and you should have about $150.-- left over for beer and hot dogs. 🙂

The SPL and excursion are @ 1400W, and you are still below Xmax in the passband. You might want to check the numbers.

Regards,
 

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#24
I'm really looking to stay with a bass reflex box for simplicity.

tb46 said:
Hi bo...,

For a loud - and nice sounding - party box put 4ea. JBL GTO1214D into a bass reflex box: V_net=250 L - 2 ducts 6"Dia. x 15" long. The drivers are about $100.-- ea. on ebay (free shipping), MDF would be fine for box material, throw in a few 1x1s for bracing and corners, some miscellaneous stuff and you should have about $150.-- left over for beer and hot dogs. 🙂

The SPL and excursion are @ 1400W, and you are still below Xmax in the passband. You might want to check the numbers.

Regards,
Click to expand...

Wow that is a sick setup. They're $87 each on amazon, and I have prime. Pretty cheap.

What amp would power that? (guessing not my 500w bash)

I'm still so confused on sub sizes vs power applied to them vs amount of subs. Essentially what would come out to being the most "boom"...
 
#25
bobbobobbo said:
I'm really looking to stay with a bass reflex box for simplicity.



Wow that is a sick setup. They're $87 each on amazon, and I have prime. Pretty cheap.

What amp would power that? (guessing not my 500w bash)

I'm still so confused on sub sizes vs power applied to them vs amount of subs. Essentially what would come out to being the most "boom"...
Click to expand...

I like this suggestion. The only thing I would suggest doing different is putting two per box, instead of four (downsizing box and venting accordingly), and sizing the boxes so they can be stacked vertically (basically ending up looking like a column of 12's), with the vents located at the top and bottom, close to wall/floor and wall/roof boundaries. This should result in something that's a bit easy to carry, and you can push into a corner to take up less floor space.

Even better if you can afford it - go for THREE 12's per enclosure, wire for a 6 ohm load, then parallel both boxes off for a 3 ohm load to the amp. Of course box and vent sizes will have to be adjusted accordingly, but this will definitely net you more output capability.
 
#26
Brian Steele said:
I like this suggestion. The only thing I would suggest doing different is putting two per box, instead of four (downsizing box and venting accordingly), and sizing the boxes so they can be stacked vertically (basically ending up looking like a column of 12's), with the vents located at the top and bottom, close to wall/floor and wall/roof boundaries. This should result in something that's a bit easy to carry, and you can push into a corner to take up less floor space.

Even better if you can afford it - go for THREE 12's per enclosure, wire for a 6 ohm load, then parallel both boxes off for a 3 ohm load to the amp. Of course box and vent sizes will have to be adjusted accordingly, but this will definitely net you more output capability.
Click to expand...

The thing is it's already getting far too big.. and out of my budget.

I'm really looking for 2 15"s or one solid 18". (or that 21"? ha)

I just don't know which one is the best bang for the buck factoring in total budget.. : (
 
#27
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#28
If I may; don't stare blind on 'looks'. Too deceiving.
I like the look of large drivers too, but in the end, it's to reproduce sound and let you feel the bass.

For your goal, I really-really like the quad design from Oliver! The shape can be altered as Brian suggested. ... VERY nice by simplicity!

edit: didn't read up on your last post. Happy building then! 🙂
 
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#29
ßart West-VL. said:
If I may; don't stare blind on 'looks'. Too deceiving.
I like the look of large drivers too, but in the end, it's to reproduce sound and let you feel the bass.

For your goal, I really-really like the quad design from Oliver! The shape can be altered as Brian suggested. ... VERY nice by simplicity!
Click to expand...

Oh don't get me wrong. I love brians design. I do! He should seriously make a standalone thread on it. The problem is it's so damn large at 9cubes. I wanted something more compact to be able to lug it to the porch and to the neighbors as needed.

The 18" setup would go for $480 vs Brian's at $630. (assuming I can power Brian's with an EP2000) The 18" would be in a 5cube box with another stacked on top someday.

I don't know I'll have to think about it.... it would be pretty sick. I wonder what the difference in output would end up at ha.
 
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#31
djk said:
"Going to put in a standard bass reflex box. Tuned to ?hz."

Low Rider 18 tuned to 40hz in 6 cu ft will hit x-max with 800W, if you tune it lower it handles less power.
Click to expand...

Hmmm. The box size I was looking at is actually around 5 cu ft...

Will this setup not work? 40hz seems too high for electronic/rap music. Especially considering this sub goes down to 25hz.
 
#32
I do not really understand why TH or T-tqwt is not an option, small footprint beats huge cube any day, but you're basically going to need 2 people total to lug it anywhere no matter what you build. If you are going to be stubborn about it and move things around yourself, mount some wheels on whatever you end up with, and maybe do the regular glued dark gray felt finish on the boxes for simplicity, and some hard alu corner protectors, so you do not have to fret over scratches and bumps if you or someone else have a minor mishap when moving stuff about. My 3.5c

Edit:
I use my 255cm long TH as a stereo bench and speaker stand. It's only 36,5cm deep and 42cm high. It's not so imposing when it's laid down under my tv close to the wall. Nobody realize that it's a subwoofer until i mention it.
 
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#33
"Especially considering this sub goes down to 25hz. "

Surely you jest!

Driver Properties
Name: 1808-8HPS
Type: Standard one-way driver
Company: Peavey Electronics Corporation
No. of Drivers = 1
Fs = 28.9 Hz
Qms = 8.77
Vas = 403.9 liters
Cms = 0.211 mm/N
Mms = 143.5 g
Rms = 2.971 kg/s
Xmax = 9.6 mm
Xmech = 14.4 mm
P-Dia = 384.3 mm
Sd = 1160 sq.cm
P-Vd = 1.114 liters
Qes = 0.356
Re = 6.21 ohms
Le = 0.87 mH
Z = 8 ohms
BL = 21.32 Tm
Pe = 800 watts
Qts = 0.342
no = 2.64 %
1-W SPL = 96.36 dB
2.83-V SPL = 97.46 dB
-----------------------------------------
Box Properties
Name:
Type: Vented Box
Shape: Prism, square (optimum)
Vb = 5 cu.ft
Fb = 25 Hz
QL = 5.712
F3 = 51.59 Hz
Fill = minimal
No. of Vents = 1
Vent shape = round
Vent ends = one flush
Dv = 6.63 in
Lv = 24.33 in
***************************
-12.5dB at 25hz.
 
#34
bobbobobbo said:
The thing is it's already getting far too big.. and out of my budget.

I'm really looking for 2 15"s or one solid 18". (or that 21"? ha)

I just don't know which one is the best bang for the buck factoring in total budget.. : (
Click to expand...

I'm also liking those JBL car audio woofers. Here's the 15" version at $110 each:

http://www.jbl.com/resources/Brands...ments/en-US/BoxesandParameters/GTO1514DTD.pdf
Amazon.com: JBL GTO1514D 15-Inch Die-Cast Dual-Voice-Coil Subwoofer: Car Electronics

Each single 15" of those will move about as much air as one 18" sub, due to the xmax. Get two, build each into their recommended box size of 3.5 cubes each (which they spec as including driver/port volume). That works out nicely to a 18x18x24 box built with 3/4" plywood (use birch 5 ply from home depot, trust me). Put them on casters (cheap from harbor freight), paint black, speakon connectors, handles, grilles.......you pretty much have a pair of nice entry level PA subs that are totally portable and would have no problem hanging with normal PA tops.
 
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#37
 
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#38
Hi turbodawg,

Interesting finds (Post #37).

Hi bo...,

You'll have to do a litte work and simulate the GTO1514 v. GTO1214, but it looks to me as if the 4 12" take about the same size box as 2 15", and have a higher overall performance. The 12" have been used quite successfully in this thread: http://www.diyaudio.com/forums/subwoofers/160879-build-your-own-2x12-th-kraken-212-th.html A bigger enclosure than what you're looking for, but interesting anyhow.

Regards,
 
#39
KaffiMann said:
I do not really understand why TH or T-tqwt is not an option, small footprint beats huge cube any day, but you're basically going to need 2 people total to lug it anywhere no matter what you build. If you are going to be stubborn about it and move things around yourself, mount some wheels on whatever you end up with, and maybe do the regular glued dark gray felt finish on the boxes for simplicity, and some hard alu corner protectors, so you do not have to fret over scratches and bumps if you or someone else have a minor mishap when moving stuff about. My 3.5c

Edit:
I use my 255cm long TH as a stereo bench and speaker stand. It's only 36,5cm deep and 42cm high. It's not so imposing when it's laid down under my tv close to the wall. Nobody realize that it's a subwoofer until i mention it.
Click to expand...

I'm not going huge cube. Otherwise I would definitely to a TH and 2 15"s or 4 12"s. Your bench is still over 10 cubes, yes not too imposing, I'd like to stay under 6.. Handle on each side, me and a buddy move wherever.

djk said:
"Especially considering this sub goes down to 25hz. "
Surely you jest!
....
Click to expand...
Well I was just quoting the specs (Frequency response: 25-1000 Hz).
Obviously not in a 5 cube box, I'm just saying it goes so low, it's a shame to waste it away because of a small box.

turbodawg said:
I'm also liking those JBL car audio woofers. Here's the 15" version at $110 each:

Each single 15" of those will move about as much air as one 18" sub, due to the xmax. Get two, build each into their recommended box size of 3.5 cubes each (which they spec as including driver/port volume). That works out nicely to a 18x18x24 box built with 3/4" plywood (use birch 5 ply from home depot, trust me). Put them on casters (cheap from harbor freight), paint black, speakon connectors, handles, grilles.......you pretty much have a pair of nice entry level PA subs that are totally portable and would have no problem hanging with normal PA tops.
Click to expand...

Those are actually pretty nice. 2 of those in a single box would be pretty awesome. (yet still a bit large, and I only want to do one enclosure)

tb46 said:
Hi turbodawg,

Interesting finds (Post #37).

Hi bo...,

You'll have to do a litte work and simulate the GTO1514 v. GTO1214, but it looks to me as if the 4 12" take about the same size box as 2 15", and have a higher overall performance. The 12" have been used quite successfully in this thread: http://www.diyaudio.com/forums/subwoofers/160879-build-your-own-2x12-th-kraken-212-th.html A bigger enclosure than what you're looking for, but interesting anyhow.

Regards,
Click to expand...

I should clear up. The 12" setup (or the 2x 15" setup) is awesome. I'm not against it in any way. I just feel yes the enclosure is too large and too much $ (granted those jbls come in at +$20 over pro 18"). I could probably squeeze them in, and get the cheaper drivers. Yet a quality 18" and nice amp, in a very manageable size, seems to be a good fit. I can then build a second one someday as needed.
 
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#40
bobbobobbo said:
Those are actually pretty nice. 2 of those in a single box would be pretty awesome. (yet still a bit large, and I only want to do one enclosure)

I should clear up. The 12" setup (or the 2x 15" setup) is awesome. I'm not against it in any way. I just feel yes the enclosure is too large and too much $ (granted those jbls come in at +$20 over pro 18"). I could probably squeeze them in, and get the cheaper drivers. Yet a quality 18" and nice amp, in a very manageable size, seems to be a good fit. I can then build a second one someday as needed.
Click to expand...

Fair enough, but you really need to download winisd pro (free) and run some sim's with various drivers and enclosure sizes, just so you know what you're getting. There's a huge range in drivers and how they model in enclosures, even among the same size. You need to select the right 18" that works in smaller enclosures.
 
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