My buddy and I have built quite a few octoport boxes. Once a few people saw us make boxes like that it was on. It is a pain but it looks awesome and they’ve always sounded good. Great video as always
I'm a dumb ape. I called everyone for round tubes. They didn't have my size. One shipping tube company quoted me $375 to make a cardboard tube. Angrily I purchased a 3D printer to make a 7.125" port, and joined short sections of PC filament tube (printer bed height issues) together for the tuning frequency. I also now have a small flotilla of tug boats. 😅
You should do a couple of videos about getting the most out of inexpensive subs and speakers, using processing, enclosures, sound deadening, and placement
@@AlanRaybasshead I think it would be really cool to take a couple of cheap subs, like something from Boss or Dayton audio, and do a build to get the absolute most in terms of sound quality and output.
@@justsomeyeti5814 got my ears tingling, I got four single voice coil subs that were doing on 136 in their recommended sealed enclosure, building another quad box with aero ports to get more out of them on a sfb1000... I love 4ohm single voice coil subwoofers because, in parallel the easiest wiring process they go down to one ohm. Which I found almost any amp I've ever run is stable enough to do with enough juice. I got a box in mind that should be musical but rail. I'm no major box designer but I sure like to design with budget in mind😁
Adding funny little things without bringing any attention to them (like the finger hands) is way funnier than cutting in movie clips and cartoon sound effects that wind up just wasting time like other channels do. Love this channel!
I like to put Octoport into 4th order band pass boxes. I run to through the rear chamber to get the length inside the box. For this situation I find it sounds better and looks way better than a slot port.
It’s quite fun when you think of the ports total surface area to displacement volume it takes up. Slot ports with three common walls are the most space efficient but depending on the ratio of width to height (square is best) you may not have enough port area or you may have a super thin width port = sounds bad/port noise. On the opposite side aero ports or round ports have the least total surface area but do not get to use part of the boxes sides so it’s displacement volume is usually larger once you factor in the additional bracing required a slot port 3 common wall gives. Every other shape approaching a circle aka hexagon or octagonal shaped ports end up with more surface area and volume (but you can make them custom and usually more rigid than an aero port without fiberglass reinforcement).
For pipe size problems. Stainless exhaust pipe and aluminium boost pipe, comes in measurements up to 3" and normally comes in multiple sizes normally in 3/8s - 3 to 4mm differences at a time. I know metal isn't perfect for resonance but you have a large choice in sizes.
#tinyhandarmy 😂 How to measure for a truck subwoofer: ruclips.net/video/t_KK8XPyxDg/видео.html How to Aeroport a Pipe Port: ruclips.net/video/dCYPyW2pnJk/видео.html Making a T-Line Subwoofer Box: ruclips.net/video/KuBTuUdy460/видео.html
I dont have much space in my car and my sub box is taking my whole back space thus the port is very limited, does moving the port to the top make it any better and be less sufficated?
To adjust the guide on the table saw to accommodate for the angle, just put a square on the piece with the shortest side (2.5") at the bottom. Measure that gap. Multiply by 2 and add that to the 2.5". Set your guide to the total. Why waste the wood?
Even doing it your way, you'd waste a little, because you would have to find tune it at least a little bit anyway. Doing the cut-then-adjust method is simpler.
@@coreycantwell2019 to each there own. My way there's less waste and for me it's easier. As for quicker, I could have my piece cut before he would at that method. There's no wrong way with either, I was simoly stating a way that has less waste and in all reality, is quicker.
How do you figure port length when the edges are rounded over on the ends? Where does your port actually end? I ask because the ends of your port are actually a larger diameter than what the port is supposed to be.
Mark, Can you go over how to set the round over bits so it give such a smooth tangent radius? I don’t remember you covering that in your router skills videos. Thanks
Isn't your example of length based on diameter of the tube? Obviously you dont want to go small enough to cause chuffing issues, but couldn't you reduce the diameter to allow for a shorter tube?
I'm having trouble calculating an enclosure for.an 18" sub the outside is 18.5 looking for 2.5 cube box for a.4th order..If anyone could help with the angle and the size pieces I need Thanks in Advance
If it’s internal to the box, there’s so much wasted air volume with the thickness of the wood too. In a smaller enclosure, losing that volume will only make the port that much longer. I would only use them for external ports in an SPL application
@@CarAudioFabrication if you have any job site near you making house or so they trow the small peace away i used to put them in the ground i put sewage and water main in they way i say that sc. 40 works good when i was in my 20s lol i made a bass tube out one and thoult i was the man but look back now i make it all out of food would sound better like all your video great to watch and learn more about this stuff now i just have one 10 sub in my scion xb with a mono amp hit good i think lol
I’m wondering if a prime number of sides (like, say, 7) would be better; as it’s more resistant to the formation of standing waves between the flat planes of the sides?
In theory yes. I did a quick calculation and the first harmonic of this port's walls is 2152.60591 Hz which I would hope isn't being sent to the sub. You'll also note that a round tube has an infinite number of parallel sides which would make them more likely to have this problem.
@@steventhomas5865 Um… I get the feeling that some calculus gets involved when the tube is circular; but I’m too groggy - it’s 2am here - to throw anymore brain cells at it..…
Maybe I'm just getting old But if it not a Sealed box it a slot port box I've even ran a 12" in a 5 gallon bucket with a port just to get by I've even ported 6x9 and used 6x9 as subs
It looks cool, but halfway through the video i decided it wasent cool enough for all that math. The box itself makes my head spin and adding this would just make it explode. I think an adjustable areo port and some test tones would be best for me. 😄👍
That doesn't really add up. If you used more ports (of the same diameter) that would mean more port area and thus even longer ports than original for the same tuning.
@@CarAudioFabrication I didn’t think you’d actually read my comment so I made it short 😂. I’m a broke diy-er, I had a sealed 10” enclosure that I wanted to port down to ~35hz. I found a calculator, and I calculated based on my limitations of using pvc pipe, which has a fixed diameter but variable length. If I were to use 3” or 4” diameter pipe I would’ve needed outrageously long ports. Most calculators only let you chose single or dual port, but I found one that let me use 4. I was able to achieve my desired hz by using (4) 3/4 pvc tubes cut 6.75” in length.
Making an octoport looks really fun but I think I would just cut out a bunch of circle pieces with a router and make a wood aero port before I made one of these. Unless a customer directly requests it
Really love your videos I subscribe some months ago and you've shared some great info......really like your channel and sponsors products. I'm a newby to car audio I got a 2003 honda civic with a 12" sub 1200w dual voice coil but needs help with an amplifier...would really appreciate if you or your sponsor could help me out thanks #caraudiofabrication #audiocontrol 👍👍👍👍👍👍👍👍
But... what if you're a Bond villain, like Octopussy? Or a SpiderMan villain, like Dr. Octavius? It'd probably be okay then... I haven't had the courage to drill into my Lesux to install my sub or bypass the horrible amps that the car came with.
Incorrect. A 90 degree edge does not become a fillet until a roundover is applied. "A fillet is a curved face of a constant or variable radius that is tangent to, and that joins, two surfaces."
@@CarAudioFabrication apparently I wasn't clear in my statement. The 90 degree before the round over, Roman Ogee, miter what ever, is absolutely called a fillet. Words like 'incorrect' make you seem douchey or like the old Speak and Spell.
Because once you understand it it is just as accurate of a unit system as metric. Contrary to your beliefs the only benefit of metric is it is easier to remember. It's not more accurate or precise. The vast majority of my audience is in the US and understands imperial units over metric.
![Oasis - Oasis Live '25 [Official Trailer]](http://i.ytimg.com/vi/gol_JnuEtKM/mqdefault.jpg)
My buddy and I have built quite a few octoport boxes. Once a few people saw us make boxes like that it was on. It is a pain but it looks awesome and they’ve always sounded good. Great video as always
I'm a dumb ape. I called everyone for round tubes. They didn't have my size. One shipping tube company quoted me $375 to make a cardboard tube. Angrily I purchased a 3D printer to make a 7.125" port, and joined short sections of PC filament tube (printer bed height issues) together for the tuning frequency. I also now have a small flotilla of tug boats. 😅
The number of times I've bought tools because it was cheaper than paying for a service
Stack fab is the way to go to a custom round port. Yes it will take a little time and a lot of dust but in the end it is well worth it.
You should do a couple of videos about getting the most out of inexpensive subs and speakers, using processing, enclosures, sound deadening, and placement
yep Im doing 142.8 db's with a worn out old , HDC3 18" . Wish I had a new Crossfire sub. but im still maximizing this one
@@AlanRaybasshead I think it would be really cool to take a couple of cheap subs, like something from Boss or Dayton audio, and do a build to get the absolute most in terms of sound quality and output.
@@justsomeyeti5814 got my ears tingling, I got four single voice coil subs that were doing on 136 in their recommended sealed enclosure, building another quad box with aero ports to get more out of them on a sfb1000... I love 4ohm single voice coil subwoofers because, in parallel the easiest wiring process they go down to one ohm. Which I found almost any amp I've ever run is stable enough to do with enough juice. I got a box in mind that should be musical but rail. I'm no major box designer but I sure like to design with budget in mind😁
Adding funny little things without bringing any attention to them (like the finger hands) is way funnier than cutting in movie clips and cartoon sound effects that wind up just wasting time like other channels do. Love this channel!
Can you do a video on table saws and the different features to look for when buying one?
Sawstop. It's cheaper than surgery.
So many good woodworking channels out there just use them for guidance
@@ldhenderson95 lol that’s not even true! Sawstop=$$$$$
@@muchanoy Google is free. Reattaching a finger cost starts at 4x the price of a Sawstop
I like to put Octoport into 4th order band pass boxes. I run to through the rear chamber to get the length inside the box. For this situation I find it sounds better and looks way better than a slot port.
Love the new content lately 😁 I like when the uploads are so frequent👍🏼
Glad someone noticed. Lol. Its been a ton of work.
Ive been building enclosures with octoports for many years now, great results and they look awesome. Good vid!
Thanks! Glad to hear!
I've never tried the octagon port but you killed it.
How do you determine the length of that style port? Most calculators just do round or square?
5:00 mark the 2.5" on the board. Line up 2.5" mark with saw blade, adjust guide rail to cut location. Cut.
You have to eyeball the angle and I find it's not as precise but either method works.
@@CarAudioFabrication We already know the angle. I thinking about it as less waste but agreed.
Shout out to your "strong hand" demonstrator!
Your work is just pure beauty brother! Do you custom built box for people also?
It’s quite fun when you think of the ports total surface area to displacement volume it takes up. Slot ports with three common walls are the most space efficient but depending on the ratio of width to height (square is best) you may not have enough port area or you may have a super thin width port = sounds bad/port noise. On the opposite side aero ports or round ports have the least total surface area but do not get to use part of the boxes sides so it’s displacement volume is usually larger once you factor in the additional bracing required a slot port 3 common wall gives. Every other shape approaching a circle aka hexagon or octagonal shaped ports end up with more surface area and volume (but you can make them custom and usually more rigid than an aero port without fiberglass reinforcement).
For pipe size problems. Stainless exhaust pipe and aluminium boost pipe, comes in measurements up to 3" and normally comes in multiple sizes normally in 3/8s - 3 to 4mm differences at a time. I know metal isn't perfect for resonance but you have a large choice in sizes.
Hmm interesting, you are still left with the challenge of how do you mount into the box and as you mentioned resonance, but a curious idea for sure.
What if you wrapped the tube with sound shielding material? Would that address the resonance problem?
All that trouble why not just build a stack port or octoport? lol
Epoxy over cardboard tubing.
Or fiberglass over cardboard tubing.
I think that type of port, so cool looking.
I think
Always something new, instructional/informational and to the point. Love this channel! I've learned quite a bit being subbed!
Thanks man!
Happy to help. 😎
9:33 I was like.. wtf homie got baby hands then I realized oh lol
#tinyhandarmy 😂
How to measure for a truck subwoofer: ruclips.net/video/t_KK8XPyxDg/видео.html
How to Aeroport a Pipe Port: ruclips.net/video/dCYPyW2pnJk/видео.html
Making a T-Line Subwoofer Box: ruclips.net/video/KuBTuUdy460/видео.html
I dont have much space in my car and my sub box is taking my whole back space thus the port is very limited, does moving the port to the top make it any better and be less sufficated?
Looks great. You should get a van and expand 🍻
deeeeeeeeeeeeer
Thank you for always providing tips and in depth explanations!!
Thank you for the positive vibes. Appreciate you.
Noticed that the table-saw has metric markings, so if you want to make it easier to do the calculations ditch the imperial-measurements!
The math is easy regardless of what units are used. But I understand if you aren't familiar with imperial why it is confusing for you
Lol, my grandad passed away in 1970. He used imperial measurements. It's so antiquated.
@@CarAudioFabrication It's not confusing, just a hell of a lot easier! Less wastage by doing more accurate cuts & avoiding 'guesstimates'!
I 3-D print my tube style ports. Very cheap and customizable!
To adjust the guide on the table saw to accommodate for the angle, just put a square on the piece with the shortest side (2.5") at the bottom. Measure that gap. Multiply by 2 and add that to the 2.5".
Set your guide to the total. Why waste the wood?
Even doing it your way, you'd waste a little, because you would have to find tune it at least a little bit anyway.
Doing the cut-then-adjust method is simpler.
@@coreycantwell2019 to each there own. My way there's less waste and for me it's easier.
As for quicker, I could have my piece cut before he would at that method. There's no wrong way with either, I was simoly stating a way that has less waste and in all reality, is quicker.
Would love to see a video on setting the acubass on the audio control
Could you do a video on how to determine port area/tunning?
Simpler is more simple!
Mark, what about a septaport (7) or any other odd number? Unequal sides so no wave cancelation...
Your the man!
Appreciate that, just a guy doing my best to help y'all out. :) Thanks for watching.
How do you figure port length when the edges are rounded over on the ends? Where does your port actually end? I ask because the ends of your port are actually a larger diameter than what the port is supposed to be.
So I just bought a 2021 Elantra n-line with a Bose speaker system with a subwoofer. Is there any way to box it when it's mounted to the deck lid?
Thanks for another great video!
Mark,
Can you go over how to set the round over bits so it give such a smooth tangent radius? I don’t remember you covering that in your router skills videos.
Thanks
Can you do a bandpass enclosure, either 4th or 6th order.
Could just add the thickness of the wood to your 2.5 inch, should work out the same with those angles
This is the perfect way to the cutting size for each piece
I'm surprised you didn't use a birds mouth bit for a superior joint on polygon barrels.
I am surprised that you are surprised. Keep it simple.
22.5 degress outside miter will add 3/8 to a piece of material 3/4 thick.
What size/radius round-over bits were used?
Isn't your example of length based on diameter of the tube? Obviously you dont want to go small enough to cause chuffing issues, but couldn't you reduce the diameter to allow for a shorter tube?
I'm having trouble calculating an enclosure for.an 18" sub the outside is 18.5 looking for 2.5 cube box for a.4th order..If anyone could help with the angle and the size pieces I need Thanks in Advance
If it’s internal to the box, there’s so much wasted air volume with the thickness of the wood too. In a smaller enclosure, losing that volume will only make the port that much longer. I would only use them for external ports in an SPL application
I would be willing to consider using an octoport
if you want a bigger port you can to use sewage pipe they come all size allot over 15 inch to
Usually you have to buy a large length though.... look up the prices for those... lol. Not really economical
@@CarAudioFabrication if you have any job site near you making house or so they trow the small peace away
i used to put them in the ground i put sewage and water main in
they way i say that sc. 40 works good
when i was in my 20s lol i made a bass tube out one and thoult i was the man but look back now i make it all out of food would sound better
like all your video great to watch and learn more about this stuff
now i just have one 10 sub in my scion xb with a mono amp hit good i think lol
Slot port all day long😊
3/16 and 13/16 are interchangeable? 😅
How do you figure out the displacement of an octagon port?
Determine the area based on the size of the outside of the octagon, then multiply by the length to get the displaced volume.
Couldn't you 3-d print your round port?
I will definitely stay with a slot port for the same reason you have mentioned.
Bonjour vous faites des caisson de roue de secours merci
I was told aero/octo port designs are more efficient and you don't need quite the same port area/length
I’m wondering if a prime number of sides (like, say, 7) would be better; as it’s more resistant to the formation of standing waves between the flat planes of the sides?
In theory yes. I did a quick calculation and the first harmonic of this port's walls is 2152.60591 Hz which I would hope isn't being sent to the sub. You'll also note that a round tube has an infinite number of parallel sides which would make them more likely to have this problem.
@@steventhomas5865 Um… I get the feeling that some calculus gets involved when the tube is circular; but I’m too groggy - it’s 2am here - to throw anymore brain cells at it..…
I hold two world records with a octoport.
Nice!
I plan on doing an octoport, but with two sides longer. So, a truncated rectangle rather than a truncated square.
Nice! That will be cool. Obviously some different math for the area of the port but will definitely be unique
Maybe I'm just getting old
But if it not a Sealed box it a slot port box I've even ran a 12" in a 5 gallon bucket with a port just to get by I've even ported 6x9 and used 6x9 as subs
Nice hands Mark! Are you working out?
Thanks for the great content have been watching alot of your older videos. Has been helpful with my current install
That's awesome glad you are enjoying them
It looks cool, but halfway through the video i decided it wasent cool enough for all that math. The box itself makes my head spin and adding this would just make it explode. I think an adjustable areo port and some test tones would be best for me. 😄👍
What if you don't use a port, only a 3" hole in the box? Would it bumb do?
This would be a very bad idea... lol
@@CarAudioFabrication How short is too short? Make a video of it?
Nice little hand mark!😂😂
😁
Howcome people dislike these videos?... Tsek
if the subwoofer box is set to 36hz. it means that I have to set the amplifier to 36hz
Negative
Okay I like it
why use a single large port vs multiple small ports? I saved myself from 3 foot dual ports with ~7 inch quad ports. It hits very low still
That doesn't really add up. If you used more ports (of the same diameter) that would mean more port area and thus even longer ports than original for the same tuning.
@@CarAudioFabrication I didn’t think you’d actually read my comment so I made it short 😂. I’m a broke diy-er, I had a sealed 10” enclosure that I wanted to port down to ~35hz. I found a calculator, and I calculated based on my limitations of using pvc pipe, which has a fixed diameter but variable length. If I were to use 3” or 4” diameter pipe I would’ve needed outrageously long ports. Most calculators only let you chose single or dual port, but I found one that let me use 4. I was able to achieve my desired hz by using (4) 3/4 pvc tubes cut 6.75” in length.
Making an octoport looks really fun but I think I would just cut out a bunch of circle pieces with a router and make a wood aero port before I made one of these. Unless a customer directly requests it
You'd be spending a considerable amount of more time stacking a round port than making this.
Wow, that's a lot of work for not a lot of return. Looks great though
Built an octoport on a box for an 8" few years back.sounded great,till that little 8 died😢
How about a Chevy Bow-Tie port? How would one do the math on that
Break the area down into rectangles and triangles. Or could just model it on a computer and let it do the math.
EXO has entered chat
Love that dude! He does a killer job on the SPL side of our beloved hobby.
Spl is for dummies. Low asf SQ is where it's at.
dude, those flush trim bits are nice but i had a heart attack when i saw some of them are $200. maybe i can put it on my christmas list
Like most things of quality.. they get pricey! 😎👍
@@CarAudioFabrication just like a good amp or sub, or wine if you're into that kinda thing
Octagons are the bestagons
Except for brestagons!
Really love your videos I subscribe some months ago and you've shared some great info......really like your channel and sponsors products.
I'm a newby to car audio I got a 2003 honda civic with a 12" sub 1200w dual voice coil but needs help with an amplifier...would really appreciate if you or your sponsor could help me out thanks #caraudiofabrication #audiocontrol 👍👍👍👍👍👍👍👍
But... what if you're a Bond villain, like Octopussy? Or a SpiderMan villain, like Dr. Octavius? It'd probably be okay then...
I haven't had the courage to drill into my Lesux to install my sub or bypass the horrible amps that the car came with.
Lol. Octoport Man
Legit only just built one 2 days ago but for a box not a port lol
Because sound hates straight lines, it needs a curved path
I have an octoport in my box
That hard edge is called a filet.
Incorrect. A 90 degree edge does not become a fillet until a roundover is applied. "A fillet is a curved face of a constant or variable radius that is tangent to, and that joins, two surfaces."
@@CarAudioFabrication apparently I wasn't clear in my statement. The 90 degree before the round over, Roman Ogee, miter what ever, is absolutely called a fillet. Words like 'incorrect' make you seem douchey or like the old Speak and Spell.
I want to buy a subwoofer
Ha ha dude look at me Octoport... sorry man but that looks like grampa's gramophone!
Haha that it does. 🤣
@@CarAudioFabrication a fabbed plastic octoport would look pretty cool
tiny hand gang
Why why why r u still using inches?
Because once you understand it it is just as accurate of a unit system as metric. Contrary to your beliefs the only benefit of metric is it is easier to remember. It's not more accurate or precise. The vast majority of my audience is in the US and understands imperial units over metric.
@@CarAudioFabrication of course it is just as accurate. Stick to the imperial if you want. Cant force you to the right path :)
The lil fake hand lolololol
Almost lost my thumb building one.
Don't tell me... it was down between the cushions.
STOP! Dont do the octoport..🤪