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post #1 of 17 Old 05-07-2013, 11:36 AM - Thread Starter
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Hello,

A friend of mine runs a small mobile DJ business and supports small events such as Weddings, Proms etc. Him and I were kicking around at the idea of building a DIY subwoofer for DJ purposes.

A few goals / constraints
  • Most output for the money
  • Size is only limited to an enclosure (or pair of) that can fit through a normal door.
  • Budget is flexible, but would likely like to keep things around or less than $1000 (excluding amplifier)
  • Open to attempting a ported / vented enclosure
  • Will be used for music only so design should allow for optimum output in the corresponding frequency range
  • Probably not interested in attempting a horn / folded horn design
  • Have experience building car audio enclosures, but nothing to this extent.

I had considered something with 4 DCS450-4 18" woofers, but am completely open to any suggestions. An overly large enclosure is not a problem at all and had considered putting this on Casters anyway.

How does everyone feel about the "keystone" design:
http://www.diyaudio.com/forums/subwoofers/185588-keystone-sub-using-18-15-12-inch-speakers.html

We'd like to get started on this very soon!

Any input?

Thanks!
Neil
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post #2 of 17 Old 05-07-2013, 01:04 PM
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I would look into 15-18" pro woofers and use them in a ported enclosure tuned to around 35hz. The DCS450 doesn't model too well in a ported enclosure.

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post #3 of 17 Old 05-07-2013, 01:05 PM
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post #4 of 17 Old 05-07-2013, 01:51 PM
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Quote:
Originally Posted by Quicktime_GT View Post

Hello,

A friend of mine runs a small mobile DJ business and supports small events such as Weddings, Proms etc. Him and I were kicking around at the idea of building a DIY subwoofer for DJ purposes.

A few goals / constraints
  • Most output for the money
  • Size is only limited to an enclosure (or pair of) that can fit through a normal door.
  • Budget is flexible, but would likely like to keep things around or less than $1000 (excluding amplifier)
  • Open to attempting a ported / vented enclosure
  • Will be used for music only so design should allow for optimum output in the corresponding frequency range
  • Probably not interested in attempting a horn / folded horn design
  • Have experience building car audio enclosures, but nothing to this extent.

I had considered something with 4 DCS450-4 18" woofers, but am completely open to any suggestions. An overly large enclosure is not a problem at all and had considered putting this on Casters anyway.

How does everyone feel about the "keystone" design:
http://www.diyaudio.com/forums/subwoofers/185588-keystone-sub-using-18-15-12-inch-speakers.html

We'd like to get started on this very soon!

Any input?

Thanks!
Neil

Art did a great job designing and documenting the Keystone.

Follow those plans, use the right driver, brace the cabinet properly, and your results should match his.
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post #5 of 17 Old 05-07-2013, 01:54 PM
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Remember at weddings the way it looks is also very important, better if you can hide it completely. Also it should be easy to move for a single person. I use a single Yorkville LS720P. It's a 15inch 730 watt powered sub and I have know problems with events with 200 people. How many people will be at the event he is doing and what speakers is he using?
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post #6 of 17 Old 05-07-2013, 02:49 PM
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Quad 460-8's powered with a nu6000DSP and ported to 40hz should work well.
You'll need 2 channels of ~1000w @ 4-ohm.
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post #7 of 17 Old 05-07-2013, 04:30 PM
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For around $1300 shipped you can get a single Yorkville LS801P. Max SPL 140dB Peak (134dB Continuous). http://yorkville.com/loudspeakers/elite/product/ls801p/ No need for anything more for sub 400 people events.
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post #8 of 17 Old 05-08-2013, 07:48 AM
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BC21SW152-4 131.6 dB, 92 volts, 3.4 ohms, 2489 watts
BC18SW115-4 130.1 dB, 76v, 3.43 ohms, 1683 watts
BC18TBW100-4 127.8 dB, 59v, 3.32 ohms, 1048 watts
Eminence 2xLab12 126.3 dB, 36.5v, 2.22 ohms, 600 watts (300w.p.d.) 128.4 dB at 40 Hz.
Eminence 4015LF 121.9 dB, 38v, 5.17 ohms, 279 watts

Sounds like a winner to me.
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post #9 of 17 Old 05-08-2013, 03:46 PM
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Quote:
Originally Posted by Manic1! View Post

For around $1300 shipped you can get a single Yorkville LS801P. Max SPL 140dB Peak (134dB Continuous). http://yorkville.com/loudspeakers/elite/product/ls801p/ No need for anything more for sub 400 people events.
You must not be doing the type events/shows that I used to and currently do.

For 400 people I would suggest 4 per side.

For jazz you could possibly get by with less

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post #10 of 17 Old 05-08-2013, 08:13 PM
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Quote:
Originally Posted by Ivan Beaver View Post

You must not be doing the type events/shows that I used to and currently do.

For 400 people I would suggest 4 per side.

For jazz you could possibly get by with less

I AM. You have 300 people at a wedding but you will have maybe 1/2 dancing at a time. 4 per side would be ridiculous unless you are doing a rave or something. Remember Your average wedding DJ is getting paid $400 to $1000 per vent and spending over 10K on subs a long would make no financial sense and would be a pain in the ass to move.
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post #11 of 17 Old 05-08-2013, 10:04 PM
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Quote:
Originally Posted by BassThatHz View Post

Quad 460-8's powered with a nu6000DSP and ported to 40hz should work well.
You'll need 2 channels of ~1000w @ 4-ohm.

I agree with this, two enclosures each 10cuft internal housing dual PA460-8's, four 4" PVC ports 6" long, and use a protective high pass at 35hz. With 1000 watts per enclosure they should give you some crazy output and come in well under budget.
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post #12 of 17 Old 05-08-2013, 10:34 PM
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No reason not to go with a horn.

http://www.diyaudio.com/forums/subwoofers/202797-ss15-build-x8.html

The ss15 is a light weight tapped horn designed to be easily build out of a single 4x8 sheet of ply.

Edit: I should read entire posts before recommending a speaker, totally skipped the "no horn" part. But I still think you should give the ss15 a try smile.gif
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post #13 of 17 Old 05-08-2013, 10:55 PM
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Quote:
Originally Posted by mtg90 View Post

I agree with this, two enclosures each 10cuft internal housing dual PA460-8's, four 4" PVC ports 6" long, and use a protective high pass at 35hz. With 1000 watts per enclosure they should give you some crazy output and come in well under budget.

Now how are you going to move that every time and what type of vehicle are you going to use. Remember his buddy is a mobile DJ.
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post #14 of 17 Old 05-08-2013, 11:08 PM
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Quote:
Originally Posted by Quicktime_GT View Post

  • Size is only limited to an enclosure (or pair of) that can fit through a normal door.

An overly large enclosure is not a problem at all and had considered putting this on Casters anyway.
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post #15 of 17 Old 05-09-2013, 03:51 AM
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"Budget is flexible, but would likely like to keep things around or less than $1000 (excluding amplifier)"

peavey low rider would be worth having a look at. ~$215 delivered ea.

pretty good xmax for a p.a. woofer and decent inductance.

8 cubic feet tuned to 30hz should cover most music types without getting to be too big.

http://www.parts-express.com/pe/showdetl.cfm?partnumber=294-301

as for form factor, simple slot ported would be fine:


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post #16 of 17 Old 05-09-2013, 06:30 AM
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Quote:
Originally Posted by LTD02 View Post

"Budget is flexible, but would likely like to keep things around or less than $1000 (excluding amplifier)"

peavey low rider would be worth having a look at. ~$215 delivered ea.

pretty good xmax for a p.a. woofer and decent inductance.

8 cubic feet tuned to 30hz should cover most music types without getting to be too big.

http://www.parts-express.com/pe/showdetl.cfm?partnumber=294-301

as for form factor, simple slot ported would be fine:

My experience was less than positive with the one 15" Low Rider I purchased. There has been positive discussion about the 18", however. See post #11 in this thread, YMMV:

http://techtalk.parts-express.com/showthread.php?232833-Dual-Pro-Sub-Placement&highlight=zhillsguy
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post #17 of 17 Old 05-09-2013, 01:37 PM
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hhmmm...those specs don't look so great. i wonder what was going on...

Listen. It's All Good.
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