STOP LOSING BASS! Subwoofer Box Window Brace - How to Make

[@publius1776ad]

The professionalism of your videos are second to none. I've learned a lot from you. Thanks.

[@dustinfrancis560]

Hey mark, got a great idea. You should make a vid for all us newbie’s on how to use a router and what each type of bits do

[@CarAudioFabrication]

Best router bits for newbies video: kzbin.info/www/bejne/rpSToaKKlL-Bjck

[@CarAudioFabrication]

Question: Did you guys like how I did a budget example and a professional example? It seems like you guys ask for budget examples a lot, but whenever I do them I don't hear anyone say anything about it. Let me know! Thanks for tuning in! If you missed my new "Entry Level" subwoofer box build video from earlier this week be sure to watch it here: kzbin.info/www/bejne/m4W0loicq5aXerc Thanks for watching!

[@drummerchaniking7026]

I have a question that is really off topic.....can I use the body of a car for an infinite baffle? Like if I make a make a block off panel to make the side of the body of a car an enclosure.

[@superchile9640]

Yes Mark. It’s good to see both ways as most don’t have access to the higher end tools/ templates and bits

[@seanmichael2777]

Mark is a true legend with his builds and in-depth knowledge

[@SirCavemaninthewest]

I remember my first box I made 10 years ago. It was two Dual brand subwoofers SD12 from walmart. I used 1/2" plywood, made a curved 3" port sanded by hand. W-35" x H-16" x 16" pre drilled holes and used hardware studs as terminals. No gimmicks that box could only do 30hz the lowest @ my amplifier settings. No capacitor was needed. 140 rms was my common level, I was a quiet kid in high school.

[@deluth4638]

As usual, great video! I like how you also show how it can be done with basic tools and explain why the design is stronger. For those without a router, a file or rasp removes MDF fast and can be used to bevel or round the edges. I make this same style brace for my boxes. It's definitely more labor intensive and time consuming, but it is VERY strong! I use a router table with a fence, stop blocks, and a straight cut bit. No drawing, special router bits, templates, tape, or rotten jigsaw needed. ( I have several jigsaws and hate every one of them) Although, IMO, anytime you add a fence to the router, the danger level rises. Your way looks safer.

[@cranky1812]

Great video and nice build. Just curious, have ever made a subwoofer box with MDF box surrounded with solid wood box on the outside. If yes any effect on the bass frequencies. Thank you

[@markphilpot4981]

Good job Mark explaining bracing, the need for it and design reasoning. It does no good to know the how without the why. This is why your videos rock!👍🏻

[@donellis5005]

Crutchfield got the game in a headlock💪

[@joshhuoabski3278]

Crutchfield doesn't know anything thats not on a spec sheet you would have got regardless.

[@xchimnyx]

josh, huoa bski the spec sheets they literally write? you obviously no nothing about crutchfield.

[@mugenrios2k]

When external dimensions are at a premium and internal bracing takes up to much vol. A good alternative is 1"OD wooden dowles. Make sure to pre drill to prevent splitting when screwing them to the exterior walls.

[@Timelinejumper]

Very smart! Might use this, as I have no clue how to account for the volume the square brace would change

[@The_Basscalade]

Ok I understand how to make it and everything but how do I calculate the displacement of the bracing ? I can’t find anything on how to calculate it. Would it just be HxWxD of the bracing then divide it by 1728?

[@luisparada4694]

Yes if measuring in inches. Ive been doing that research today as well

[@TheoneDragon51]

I want to know is their a audible difference between the two window braces? My bet their is no difference between the two or even a measurable difference. I agreed that you need a little bracing though. A wood dowel will get the job done just as easy.

[@CarAudioFabrication]

A big difference between no bracing and having bracing. But as far as the budget version vs pro version, likely not much, but tell me: Which would you rather have in your box?

[@grady.stu.8300]

Ive found that wooden dowels do a good job but this way is definitely better. I'm putting my box together today. 5 cubes before bracing for 2 avatar Stu 12s tuned to 28hz. I'm looking to have a 4.8 ish cubes when all said n done. 1 cube bigger than recommended. 8" aeroport.

[@RussLyman]

another great video with a wealth of knowledge

[@CarAudioFabrication]

Much appreciated! Thanks Russ. 6 years as a subscriber now! :)

[@justinvasko3577]

Can you do a non standard box? For example, a confined space that requires multiple size sections.

[@inmyownstateofmind144]

Can we get the money video please? You know the one where you can actually hear the difference in all your hard work.

[@LingLing1337]

"Difference" there's no difference because mark teaches you how to do it right the first time

[@barrylawrence7884]

You only need to do it if your box is flexing, otherwise it's over kill.

[@charlesking678]

I'm not trying to be argumentative, but the panel flex by pushing the board isn't the best example. One panel will flex, but try that same experiment when the boards are screwed together as a box. Especially a small box like one. It'll bee fairly solid. Again love your videos bro!

[@inmyownstateofmind144]

You do have a point though. This is why I commented.... GIVE US THE MONEY VIDEO NOW!!!

[@CarAudioFabrication]

You guys will honestly nitpick the tiniest little things. Its just to show an example. Build a box with zero bracing, you will be able to feel the wood flex at volume. It wouldn't have been very exciting to rest my hand on something and say "I can feel this flexing"

[@moreaudio760]

another great one mark ,keep up the good work buddy

[@toddlerh9667]

Thank you for spreading your knowledge. I've been into hobbie car audio for many years my newest system is by far the cleanest clearest yet because of your teaching. Could you touch on box calculations for multiple subs in one container (port or not...)? please and thank you

[@joshhuoabski3278]

How about calculations for an area where the only actual shape is the surface that the speaker mounts on? EG, under seat of a ram 1500, 2009-2018 extended or crew cab. Pick a side. The 60 or the 40. Volume goal....1.106 cu.ft. exact spec with displacement of the 12"sub included. Hint. It fits, sounds great, and you will need to get the extra volume necessary from the area behind the seat while still being able to fold the seat up. Challenge presented!

[@trojanman22]

What did you use for your outfeed/assembly table???

[@JamesMurphy-re3hm]

two days in a row of my favorite youtuber . i think i might be dreaming. 3 days possibly? mark.?

[@CarAudioFabrication]

I need a video editor!

[@BlendedLife]

@@CarAudioFabrication I was just randomly reading through the comments and saw this. I've been editing for 25 or so years. I can show you hundreds of videos on KZbin with millions of views I have edited. Shoot me a message if your interested in talking about editing! (This channel is mine and my wife's little passion project)

[@kuronekosan2830]

My subwoofer box sound hollow when i knock on it It's a ported enclosure Will adding lots of dowels make it stiffer and reduce the echo inside ?

[@mitchellantonsen44]

Is there a reason you don't triangulate the bracing?

[@kevinali1642]

How do we calculate the air space the bracing uses?

[@marko642003]

What carpet do you use for covering your boxes? I want to carpet and up coming box project, but I hace no idea what to buy

[@HifiVega]

You on fire this week!

[@commando7707]

Mark, maybe you can help me out - I would like to know how much performance is lost by using subwoofer enclosures with flat walls as opposed to a sphere shaped enclosure. I've done multiple searches, but can't find anything.

[@CarAudioFabrication]

I would expect any performance changes whatsoever.

[@Bodelier]

So at how many watts would you recommend starting to use bracing? I have a 600W RMS sub, but never felt the need for bracing. Though since I never used it I don't know if it makes a difference. Need to build a new box for it soon anyway, since I got another car, was wondering if you'd think 600W would benefit from bracing.

[@SubwooferGym]

@Jason S If your box itself is visibly flexing you're losing spl. That's just physics

[@northeastcorals]

Great channel, I stumbled across it while looking up home theatre videos. Have you ever made subs for Home Cinema applications? Would be great to see if you have, keep up the good work!

[@CarAudioFabrication]

Check out my T Line build kzbin.info/www/bejne/gaalhaiLmd5nbJI

[@northeastcorals]

Just did thanks, nice build mate 👍

[@seanmichael2777]

The best car audio installation ever

[@lamontetownes8292]

How much do you charge for box design i have some lightning auto and i wanted to get the most out of them with a ported box

[@CarAudioFabrication]

Many options so it depends, you can review here: www.caraudiofabrication.com/box-designs

[@PureBlood42]

I'm trying to remember his terminology so I can regurgitate it to some random person and sound like I'm schooled in acoustics. Lol

[@razzlebazel]

Lol ikr

[@joshhuoabski3278]

Like word vomit?

[@PureBlood42]

@@joshhuoabski3278 🤮...Yessss

[@miguelsoriano4846]

My problem with a pair of 12s is the box is too small I want to make a ported box that would still allow me to fit stuff in the back of a Honda Accord 2008

[@davidtanguma6247]

What if you cut out a large oval in the middle.

[@jasoncsullog3741]

But now, there is quite a bit of refiguring VaS as you have taken up quite a bit with the braces. That's quite a bit of extra, and tedious, math calculations in order to get the proper tuning of your enclosure. It is already enough of a pain doing it, even with custom enclosure calculators. Is the work truly worth the payout in SQ and SPL?

[@CarAudioFabrication]

It is very little effort to properly calculate the displacement. Basic math. If you can't determine how to calculate this displacement you honestly probably shouldn't be "designing" the enclosure.

[@CarAudioFabrication]

Additionally Vas is the volume of air that when compressed has the equivalent force as compliance (Cms) of the speaker suspension. It has nothing to do with box air volume and if there is a brace or not.

[@thomasvmanning]

CarAudioFabrication can you link to the templates?

[@massholemitch6699]

Yes please do!!

[@massholemitch6699]

He posted in another thread. Mobilesolutions-USA.com

[@HockeyLAKings119]

So for rounding the edges, do you just round the side facing the sub, or round both sides?

[@massholemitch6699]

Where did you get those templates?

[@CarAudioFabrication]

My show sponsor www.mobilesolutions-usa.com

[@massholemitch6699]

CarAudioFabrication thanks for the quick response mark! Keep up the vids! Been learning a lot from you for my build 👍🏼👍🏼

[@jacobhansen9867]

Loving all the uploads Mark!

[@mxmang]

As he puts enough force on the sheet to make the whole counter bend hehe

[@1979wazza]

Why are your vents always so large? My rockford p2d212 recommends a port of 4" diameter by 10". I can convert it to, say, 1 1/2" wide by 10" high but it's depth is still only 10" deep. Yours always seem wider and far longer. Is there something I am missing? Any advice on this would be greatly appreciated as I am about to attempt my first ported box build.

[@TeGameTechGamerTips]

I got my system done a couple years ago when I didn’t know much about car audio, now that I understand what I’m doing I noticed when I adjust the bass on my factory head unit it puts bass into my midrange as well. I have a external equalizer and a lc8i that’s connected to my factory amplifier. Because I don’t want to add bass to my midrange speakers (which I think will cause distortion and damage them) my subwoofers start clipping at low levels because the bass from the head unit is set to “C” which is like flat so the bass barely even hits and when I want it to hit hard to balance with my system the amp shows that it starts clipping. Anyone know how I can fix this. By the way the idiot who did my system only used the front and midrange speakers as speaker level inputs to the lc8i and the sub and tweets get their signal from a a rca pass through.

[@matthewf1979]

All of the factory HU speaker level outputs should go to the LC8i. Read over the LC8i manual, especially the part about “Summing”. That should fix the issue.

[@josemacon7385]

Def need a subwoofer box for 2 10" kickers

[@Bomaht]

Wouldn’t a circular brace be stronger than a window brace? Serious question. Typically arcs are the strongest support shape hence bridges

[@spennington86]

I prefer to use real 3/4" plywood with minimal to no bracing of course depending on the power of the woofer. I dont see the advantage of compressed, glued up saw dust(MDF) if anyone knows of any advantages of MDF over plywood, please fill me in.

[@Aviator168]

I added 2 layers of carbon fiber to each side of the panel to make them much much stiffer.

[@nazmotuzdort1341]

need strong kind wood for this i think

[@vermili0138]

The setup to make the window bracing takes time but the payoff is too good.

[@samiam5836]

Little known fact - Most car audio enthusiasts don't own routers.

[@CarAudioFabrication]

Interesting. All the best car audio enthusiasts I know do. Maybe there is a direct relationship between being the best and owning a router. 🤔

[@XtremeQuantumSrength405]

#basshead

[@KJS988]

Benis

[@qalih]

I thought this was for preventing theft. Because I had mine stolen :( but its not loool

[@CarAudioFabrication]

I have another video for that: kzbin.info/www/bejne/kHLGeGiFr7utgKs

[@Harolds0]

and I thought they were for turbulance SMH

[@davichan9286]

Or just use birch 3/4 inch wood. And stop using shitty MDF.