DIY Sub on a budget...possible? - AVS Forum
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post #1 of 18 Old 11-13-2013, 08:56 PM - Thread Starter
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Let me start by saying that i know pretty much nothing about speakers, amps, or even sound basics, but I've been going through and reading different subwoofer threads and I definitely want to give it a shot, or see if it's possible to construct something that would be better then the budget subs you can buy today for $250 or less.

This is the current sub I have now:
Polk Audio PSW10

Budget subs I had in mind to purchase:
BIC-America-F12
Dayton Audio SUB-1200 12"
Dayton Audio SUB-1500 15"

I'm pretty good at building things, but my lack of knowledge concerning what amp, woofer, instructions for the type of box to build have me second guessing.

I've been through some of the sub build threads, however most of them seem to be way more than what I'm wanting to do. Are there any budget diy sub builds you can point me to? If I were to build something I'd like it to be a smaller box sub, nothing huge. Thank you.
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post #2 of 18 Old 11-14-2013, 01:19 AM
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most of the value in diy comes from doing something that is a little off the beaten path.

if you just want a 12" driver in a ported cab with a plate amp...

the infinity driver is probably as low of cost as you want to go:
http://www.amazon.com/Infinity-Reference-1260w-1200-watt-High-Performance/dp/B0028AVGEO

then select a plate amp:
http://www.parts-express.com/cat/subwoofer-plate-amplifiers/332

and plop it in a box. (i can help design a box with you if you would like. nothing to it with software.)

the problem is that you mention that you want it small too....

so low cost, small, but (i'm assuming) you want good spl and extension. that doesn't really all go together, which is why small low-cost commercial subs make a tradeoff in extension and spl.

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post #3 of 18 Old 11-14-2013, 06:02 AM - Thread Starter
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I'll lay aside my requirement of having a small box to see what type of box design I'd have to go with. Are there various designs, or is it basically the bigger the box the better the sub starts to be? How big do you think the box would have to be to better than of the budget commercial subwoofers?
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post #4 of 18 Old 11-14-2013, 06:26 AM
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for about $250 for the sub and driver... THT is unbeatable... box size is about 18 cu ft though (Gross).. add in a $100 plate amp and you're good to go.

as LTD02 said, it's a trade off you can't have "cheap", "small" and "powerful" all in the same picture. choose 2 of the 3 and you get the picture. you can do

cheap and small, but powerful is def gone

small and powerful, but that really jacks the price up as you get a much more powerful amp and drivers that can take a beating in small enclosed boxes

cheap and powerful,,,,,, and of course size goes right out the window.
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post #5 of 18 Old 11-14-2013, 07:18 AM
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Quote:
Originally Posted by wormraper View Post

for about $250 for the sub and driver... THT is unbeatable... box size is about 18 cu ft though (Gross).. add in a $100 plate amp and you're good to go.

as LTD02 said, it's a trade off you can't have "cheap", "small" and "powerful" all in the same picture. choose 2 of the 3 and you get the picture. you can do

cheap and small, but powerful is def gone

small and powerful, but that really jacks the price up as you get a much more powerful amp and drivers that can take a beating in small enclosed boxes

cheap and powerful,,,,,, and of course size goes right out the window.

This.
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post #6 of 18 Old 11-14-2013, 07:59 AM
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the most performance per dollar are in the horn loaded subs.

here are a couple more options:

http://www.avsforum.com/t/1329971/lilmikes-cinema-f-20

http://www.avsforum.com/t/1451519/lilmikes-lilwrecker

they offer a "whole 'nother level" of performance compared with the subs in the original post. not too complicated to build either.

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post #7 of 18 Old 11-14-2013, 08:27 AM - Thread Starter
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Those are awesome, but I'm afraid they are to big. At what price point do DIY subs in a smaller box become possible? It could be a box at about 24" or so. Thank you for all the feedback.
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post #8 of 18 Old 11-14-2013, 08:30 AM
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Quote:
Originally Posted by blobula View Post

Those are awesome, but I'm afraid they are to big. At what price point do DIY subs in a smaller box become possible? It could be a box at about 24" or so. Thank you for all the feedback.

$500 for something decent in a 2x2x2 foot cube. go bigger and you can get some serious ooomph, but those horn loaded subs (as long as you want to sacrifice some of the lower than 24hz stuff) are in a league of their own (that is until you get to the BIG boys like lilwrecker and housewrecker)
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post #9 of 18 Old 11-14-2013, 08:37 AM
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Quote:
Originally Posted by blobula View Post

Those are awesome, but I'm afraid they are to big. At what price point do DIY subs in a smaller box become possible? It could be a box at about 24" or so. Thank you for all the feedback.

I'm so enthused about the sound of my diy sub that I keep showing pictures of what I view as an ugly speaker. Nevertheless, it cost me $465 and several hours to put together from a 15" Ultimax driver from Parts Express.

ultimaxsub.jpg
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post #10 of 18 Old 11-14-2013, 09:05 AM - Thread Starter
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i like that sub. That's what I had in mind I guess you could say when thinking of building one.

Do you have a build thread?
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post #11 of 18 Old 11-14-2013, 09:08 AM
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Quote:
Originally Posted by blobula View Post

i like that sub. That's what I had in mind I guess you could say when thinking of building one.

Do you have a build thread?

don't forget you'll want an amp with DSP or a minidsp cuz sealed subs need some eq on the low end to sound right
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post #12 of 18 Old 11-14-2013, 11:48 AM - Thread Starter
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Would something like this work? See attached .pdf. I came across this on Audioholics.

Subwoofer
http://www.amazon.com/Infinity-Reference-1260w-1200-watt-High-Performance/dp/B0028AVGEO - $69

300W Amp
http://www.amazon.com/Bash-300W-Digital-Subwoofer-Amplifier/dp/B000CCS440 - $169

or this amp (although it is a lot less powerful
http://www.parts-express.com/dayton-audio-sa100-100w-subwoofer-plate-amplifier--300-802 - $89

Infinity Reference 1262 rev4 (1).pdf 36k .pdf file
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File Type: pdf Infinity Reference 1262 rev4 (1).pdf (35.6 KB, 3 views)
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post #13 of 18 Old 11-14-2013, 12:29 PM
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blob,

sealed tend to offer the least performance per dollar, but work in the smallest package.

another random idea might be to do something interesting with a pair of 12" drivers:

http://www.amazon.com/Infinity-Reference-1262w-1200-Watt-High-Performance/dp/B0028AYIXK

in a dual stack like this:



500 watt plate amp and a pair of drivers not too much money.

Listen. It's All Good.
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post #14 of 18 Old 11-14-2013, 12:31 PM
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blob, that would work well, but the 300 watt amp would be the way to go. if going with the dual woofer model, grab the 1262's so they net out ot 4 ohms.

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post #15 of 18 Old 11-14-2013, 01:04 PM - Thread Starter
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I like that dual woofer model.

How would you determine what the cut list for that would be? I know that there is a speaker building program that is used, but I'm not familiar with it.
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post #16 of 18 Old 11-14-2013, 01:26 PM
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winisd or similar program just shows the response of the drivers in the cabinet of a particular net volume, such as 5 cubic feet, for example.

it is up to you to figure out the shape of the cabinet and the panel dimensions, but it really isn't too hard once you start figuring them out. there may even be an online calculator or two if you really get stuck. you shouldn't get stuck though...

there are programs that can help optimize the panel layout on a piece of plywood to minimize scrap, but you can probably do just as good by cutting out the squares of paper and moving them around until they all fit on the boards that you have to cut.

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post #17 of 18 Old 11-14-2013, 01:54 PM
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post #18 of 18 Old 11-17-2013, 05:14 PM
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Didnt we decide the yung had the subsonic filter set too high to make it suitable for sub use?
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