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DIY Subwoofers

I really despise the photoshopped images. Show a REAL driver mounted in those boxes!
Tons of pics in their Instagram, or their Google profile. If you're on Facebook there's also a large GSG Audio group on Facebook with crazy pics getting posted in there on a daily basis.


 
I built a pair of 15-inch subs with Dayton Drivers from Parts Express. (Not a kit.) I used WinISD (FREE) to optimize the size & port. (Or, maybe I chose a box size about as large as I could live with and used the software to optimize the port.)

They are large, about 3 feet tall, and since I had an extra amplifier, they are passive. And as I have done with most of my previous DIY speakers, I covered them with leather-look vinyl (like they do with guitar amps). That makes a cheap, easy, reasonably-good looking, and reasonably-durable "finish".
Id like to see that. Im assuming sealed right?
 
For an easy DIY experience you could check out GSG.
GSG Audio Design
Not completely sure why, but get a bad vibe seeing their videos for some reason.

Kinda reminds me of someone just showing you how to glue wood together, but no real explanations of the specs or design OF the sub. Just a "Buy" what we are selling, without any in depth explanations....

Again, maybe just me??
 
Not completely sure why, but get a bad vibe seeing their videos for some reason.

Kinda reminds me of someone just showing you how to glue wood together, but no real explanations of the specs or design OF the sub. Just a "Buy" what we are selling, without any in depth explanations....

Again, maybe just me??
My experience with GSG has been very positive. The quality of the materials and the precision of their CNC machining make assembly relatively easy and the performance has been excellent. Videos are to help inexperienced people put the kits together without incident. For technical information you have to read the web pages, especially the FAQs. Probably not as complete as most ASR people would want though.
 
I built two of the ones you see in my avatar. 18" and 400 Watts with DSP! I'm happy listening to Yamamoto Trio. All the construction details and measurements are on the web.
 
................
You can make a sub that will totally smoke the majority of commercial home audio subs.

I know this is a late reply, but a fresh perspective is always welcome. I've built all my own speakers since I was a kid. And I agree with the statement above, especially when you don't have to deal with a passive crossover network. You just need to build a solid, sealed enclosure; it's not difficult to do, and you don't even need to calculate the tuning tube. Just fill it with polyfill. Buy a good speaker—a dedicated one, like a subwoofer!—and you'll be in luck.



 

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I know this is a late reply, but a fresh perspective is always welcome. I've built all my own speakers since I was a kid. And I agree with the statement above, especially when you don't have to deal with a passive crossover network. You just need to build a solid, sealed enclosure; it's not difficult to do, and you don't even need to calculate the tuning tube. Just fill it with polyfill. Buy a good speaker—a dedicated one, like a subwoofer!—and you'll be in luck.



is the 18lw 3 1200 a current product? I couldn't find it on the website.
 
I couldn't tell you. I only uploaded that photo as an illustration....
I used the Eminence Delta Pro 18 A (*), which has been discontinued.
But if you want to use 18 Sound , you have to choose a subwoofer from their catalog, and I would have liked to use one, by the way. But it was out of my budget. In practice, I don't know if you'd notice the difference, but it looks much better!;)



(*) First, I mounted it in a sealed enclosure, and finally, I converted it to bass reflex. (It didn't reach that low.) But for that, you do need to use a calculation program to tune it. I used WinISD, and it does the job perfectly well.
 
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While more expensive I like the "tour grade" Eminence drivers. They are more optimised for mid-bass but they are so efficient and so powerful that you can just add a low shelf filter and still have more LF output and massively higher mid-bass output than a dedicated subwoofer driver. I find the weakness of many systems to be 100 Hz to 200 Hz which is where "slam" / "feel it in your chest" lives. These big "pro" drivers in a large enclosure can deliver both LF and mid-bass with low distortion and high SPL. The biggest issue with crossing over higher is that you need to co-locate the subs and mains or you will get localization effects. While the common ASR wisdom is to spread subwoofers around the room to minimize room mode effects I often times find that colocated (sub and bass drivers within 1/4 wavelength of each other like in a "real" full range speaker) stereo subs with a high crossover while having a slightly less "smooth" LF FR are more satisfying by eliminating localization and time domain issues and keeping the LF stereo intact. YMMV

 
When we talk about subwoofers, everyone knows what their system needs, considering the room above all.I ruled out other speakers and preferred (from the options available here: JBL, 18 Sound, etc.) the Delta Pro because I liked its frequency response curve, although the one you mentioned seems to be even better.I don't need to reinforce the "punch"; it's a home hi-fi system. I wanted to reinforce the first two octaves because my satellite speakers (TG DTQWTII) can't be too close to the front walls due to their placement in the room. So the solution was to add two subwoofers designed to work in corners. My room is large and quite unusual, which minimizes the room's acoustics. It consists of two spaces on different levels and with different ceiling heights, etc. I consider myself lucky in that respect.

 
I built 4 closed subwoofers. Two with 30W4558T in 90 liters and two with RSS390HF in 110 liters.
The Dayton really push air in a fun way, as if a giant 'tabs' my entrance door with his finger.
All pulled by 4 x 1400W in a multi sub setup.
Got a good deal on the woofers.Cabinets are quite roughly built.. but everything works tight and deep :D
 
Can a DIY subwoofer compare to Top Brand Subwoofers such as SVS, PSA, Rythmik, if so could anyone recommend a kit, Driver, Amplfiers.

Sure. Do you want a sub designed by someone else and just want to assemble it? Rhythmik does kits last I looked, don't think SVS or PSA does.

Or dig into it and model your own? You want to cut your own wood or use a kit like GSG? Ported or sealed? Your time/labor needs to be somewhat free of charge to make it economically viable perhaps, and your finishing skills may dictate how the aesthetic works out. I've gone the diy route my last five subs....
 
I have built a number of DIY subwoofers as well as some towers, a center channel, and a pair of near field book shelves.

I don't think I saved any money but it is a hobby I have really enjoyed. I don't think many commercial speakers would be as solid as the ones I have built, nor the actual hardwood I use instead of painting or thin veneer.

DIY Subwoofer list

North Creek Music 18" Leviathan in 4 cubic foot sealed enclosure.

2 ea. Scan-Speak 32W/4878T Revelator 13" Subwoofer’s in 1.5 cubic foot sealed enclosures.

TC Sounds LMS Ultra 5400 18" in 4 cubic foot sealed enclosure

TC Sounds LMS-R 15" in 3 cubic foot sealed enclosures (two ea.)

Aurasound - 12" NS12-794-4A in 2 cubic foot sealed enclosure.

Scan-speak Revelator 9" 23W-4557T02 and 9" Passive Radiator 23W-0-00-02 in 1 cubic foot enclosure.

AuraSound - 10" NS10-513-4A in 1 cubic foot sealed box (2 ea.).

Scan-speak Revelator 28W/4878T00 – 1.3 Cubic foot sealed enclosure for BMW X6.

JL Audio 12TW3-D4 – Shallow sealed enclosure for Land Cruiser sound system.

Here are some of them.

Sub_Collage_1500p.jpg
 
Here are a few that I still have pics for. Mine are decidedly function over form though!
 

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I have built a number of DIY subwoofers as well as some towers, a center channel, and a pair of near field book shelves.

I don't think I saved any money but it is a hobby I have really enjoyed. I don't think many commercial speakers would be as solid as the ones I have built, nor the actual hardwood I use instead of painting or thin veneer.

DIY Subwoofer list

North Creek Music 18" Leviathan in 4 cubic foot sealed enclosure.

2 ea. Scan-Speak 32W/4878T Revelator 13" Subwoofer’s in 1.5 cubic foot sealed enclosures.

TC Sounds LMS Ultra 5400 18" in 4 cubic foot sealed enclosure

TC Sounds LMS-R 15" in 3 cubic foot sealed enclosures (two ea.)

Aurasound - 12" NS12-794-4A in 2 cubic foot sealed enclosure.

Scan-speak Revelator 9" 23W-4557T02 and 9" Passive Radiator 23W-0-00-02 in 1 cubic foot enclosure.

AuraSound - 10" NS10-513-4A in 1 cubic foot sealed box (2 ea.).

Scan-speak Revelator 28W/4878T00 – 1.3 Cubic foot sealed enclosure for BMW X6.

JL Audio 12TW3-D4 – Shallow sealed enclosure for Land Cruiser sound system.

Here are some of them.

View attachment 506705
My diy projects all look like kindergarten kids finished them. Well Done!
 
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