Dive Into Deep BASS: Build Dual 21 Inch Subwoofers Yourself! - Earthquake 21's

#subwoofer #bass #bassboosted
Ever wonder if a 21" sealed subwoofer can create bass you can feel? Check out this build as I take an SB Audience Rosso 21SW800, where I test whether or not room gain can help me reach subsonic frequencies in my room. Tested and revealed both room gain and bass that you can feel.
Build Plans: toidsdiyaudio.com/product/ear...
Parts Used:
21" Rosso Sub: bit.ly/3OK4CYY
Amplifier: parts-express.sjv.io/b3oY4k
T-Nuts: amzn.to/3UoJCIM
Exohide: parts-express.sjv.io/n15X2x
Foam Roller: parts-express.sjv.io/doQ6Jj
Speakon Jack: amzn.to/3GUBgWb
Speakon Plug: amzn.to/3VlNIT5
Speaker Wire: amzn.to/3UvFI0N
Soldering Iron: amzn.to/3ifdycF
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[@mullinperformanceaudio5902]

We got to see the moment Nick realized he was a basshead.

[@silicon.alchemist]

Quick hint: Tee nuts which have the teeth on them are very difficult to install unless you can hammer them in. This is even more difficult on the inside of an enclosure. They also don't work that well on MDF. There is a variation called a Propell nut, which does not have teeth on the flange, but has small ridges on the barrel. These are much easier to suck in with a bolt and work much better when you don't have hammer access. If you are worried about spinning them in the hole, just apply a dab of epoxy when you install them. Available at most woodworking stores and Mcmaster Carr.

[@Cultofpersonality09129]

I’m not good at wood working but I can paint. Professionally…. All kinds of custom colours, candies, metal flake or whatever….. with Zero orange peel. Like a show car. It’s very expensive and would have days of cutting and buffing on a set of towers………. 12-14 coats. Nobody wants to pay for it.

[@jstevens9724]

Can you do slew rate?

[@tdevosodense]

Can you build a earthquake horn , used by cerwin vega in cinemas in "the old days" 👍👍👍

[@bradstone2603]

I'd be interested in a video where a previously made set of speakers is remade but with a more comprehensive wall material (say, laminated MDF/Synthetic Stone/Accoustic Pinboard, or some other such idea) and show a side by side comparison of the specs of the two.

[@wally7856]

1st RUclips build I seen where the builder understands proper bracing. Nicely done.

[@jeanious2009]

Seth Rogan?

[@frankpanis2748]

Great video! I'm already running dual B&C 21SW152 in LLT but I'm wondering to utilize these large boxes for a second 21" B&C and make them sealed. I also agree on feeling such a pair of 21" woofers. They indeed deliver the visceral impact that dwarf most smaller subwoofer out there.

[@SUBtrauma]

What are you using to power your passive subs in your videos?

[@MrAndromeda290]

Thanks for all your videos. I'm a newbie in the speaker build, but your videos give me a lot. Greetings from Slovakia.

[@russellanderson746]

Great video! I remember reading in Martin Collom's book that, in room, an f3 of around 40 hz. was good to shoot for due to typical room gain. Also, I must point out distortion increases directly with excursion...no matter what the distortion rating of a particular driver is.

[@jukkamaljanen6644]

I love these build videos! Tip: you can simulate box, analog/dsp filters and their effects on group delay with VituixCAD. It seems ported is pretty close to closed box after you have EQed it to equal FR curve. But there are other clear benefits for closed when you go below port tuning frequency 👍

[@cragre28]

I learned a trick for t-nuts or hurricane nuts when I built a bandpass box a few years back. After you have you speaker cut out done and before you assemble the box, put the subs into the cut out and drill out the holes the same you did. Then install the t-nuts just like you did, but go ahead an drill a small hole in the t-nut flange so you can run a small screw through the t-nut and into the wood. It will not fail if you do this and you don't have to worry about it stripping out, no matter how many times you take your subs in and out.

[@rigorhead01]

So awesome!

[@jeromelester8]

Super solid enclosure - nice job!

[@shawnbrennan7075]

Beasting that subwoofer around gives me Gene DellaSala vibes. Nice work! Bottomless bass, gotta have it.

[@Vietturtle2023]

Love it!

[@FakthorX]

Excellent. You make me want to build a wall of these

[@kevinfreestone9822]

Love this box. I usually use 3 quarter inch marine Plywood with a double baffter (so 1.5.inch), but will try this next time.