Better Bass Cheap and Easy: Build a Cardboard Subwoofer!
Monday, March 23rd, 2009 running time 16:28
Build your very own high quality sealed subwoofer in just a fraction of the time it would take to build a traditional box. It's all about Sonotube, the toughest cardboard you'll ever meet!
Getting great a low frequency subwoofer usually involves a lot of cash, or spending a lot of time building up a box.
And even sealed boxes, the simplest subwoofer enclosures, can be a pain to build. So when we wanted to sample several box sizes fast, we picked up some Sonotube. It's a type of concrete form used to make columns... but with some plywood and a little routing, and a lot of glue, you can quickly sample several sizes of subwoofer enclosure.
It all started with Patrick's desire to get some decent low end bass in his truck... and a stop by the epic Pass DIY web pages, where he read about The Legend of EL PIPE-O, Nelson Pass' massive subwoofer experiment that sported 8 21-inch drivers and a pair of 12 foot hight Sonotube concrete forms.
Sonotube makes subwoofers quick and easy to build by eliminating a lot of saw cuts and joints. It's available in sizes from 2.25" to 36.90" and easy to cut to length... just head on over to the Enclosure Volume Calculator at HomeTheaterShack.com or the Subwoofer Enclosure Calculators at the12volt.com and play with the available sizes you want with various lengths until you get the volume of enclosure you're looking for. (Betwen .5 and 1.5 cubic feet in our case.)
Why sealed? In theory, tho they don't have the over the top boom of ported boxes, sealed subs have the most accurate audio response. They're also the easiest enclosures to design and build. Most important, HSU Research's ASW-1203 was designed for for a sealed box. That's Patrick's pick to go into his beloved truck.
Along with a subwoofer and Sonotube (sold by the foot at most hard core building supply places... ask them to cut it to the length you want if you don't have a tale saw at home) you'll need plywood or MDF for the end caps, glue, and at least a pair of clamps... tho a half dozen Jorgenson Pony pipe or Irwin Quick-Grip Bar Clamps can make the glue up go a lot faster!
You can use just about anything to cut out the hole for the Sonotube... but a router with a circle guide or a jigsaw will work a lot faster than any kind of hand tool.
To finish your subwoofer off, you'll need some polyfill pillow stuffing from the local crafts store, a terminal plate to attach your speaker cables too and some wire and connectors to attach the sub to the terminals.
Happy bass!
Highlights
Dextre
(
10:47, 10:47
)
hard drive
(
8:28, 8:28
)
Hak5
(
14:43, 14:47, 14:43, 14:47
)
subwoofer
(
0:11, 0:16, 2:01, 3:37, 3:44, 8:14, 8:59, 11:10, 11:39, 0:11, 0:16, 2:01, 3:37, 3:44, 8:14, 8:59, 11:10, 11:39
)
Dextre
(
10:47, 10:47
)
hard drive
(
8:28, 8:28
)
Hak5
(
14:43, 14:47, 14:43, 14:47
)
subwoofer
(
0:11, 0:16, 2:01, 3:37, 3:44, 8:14, 8:59, 11:10, 11:39, 0:11, 0:16, 2:01, 3:37, 3:44, 8:14, 8:59, 11:10, 11:39
)
Automatically Generated Transcript(may not be 100% accurate) ( more )
" What's really without -- degree of detail what the blockbuster movie Brokeback chicken button open -- to copy yet you're seeing. Without a serious subwoofer you could be missing out -- of a life expire pledges we're history how to build a subwoofer fast and cheap. On this episode of systm. This episode of systm is made possible by. Netflix Squarespace and godaddy.com. Well the system up Patrick Norton undergarments they screwed battle scene -- Abbas cello bass is critical in any audio setup could -- and extension that certain something the movies you watch or any music you listen to you. Great -- can cost. It cash experimenting with building your closures and get very expensive if you make any mistakes. In India are -- G. -- in the ability expo which advertises enclosures Hamachi to do that replete with something called. So on to and the usual pile parts so solitude is basically giant. Court or who it is designed for building quickly it's it's a concrete form material comes in can put links. What if you're building a great big building and you've seen those in the big -- right. Pillars in the middle of the building. It's a giant link to this stuff and cut it down the side of Italy and concrete pillars that prop from -- eighteenth two. I actually built an -- you. Using spear street stuff and they have been uncomfortable if sizes including besides. These double play around with that it is well it sounds. A big -- inspiration for this project is. Is -- past past lab he's epic on these audio engineer Andy had a bunch of subwoofer and was experimenting with side to. Ten -- Linksys onto the original product with two of them to collections of like forcible for each intense well Linksys on the -- The practical help hype -- it's an easy it's not going to fit in my truck at least not while still be able to drive. So we're scale things back to start with the really. Nice really inexpensive. So for -- for our -- she researched it at 123. One eloquently but you research. They make amazing so -- Mostly that you it's like the only -- bass speaker they sell you know sell pre built enclosures. -- At a few. So cool 175 -- your house which -- back it's -- ways like fifteen pounds. The song to -- the enclosure. Reason plywood the end capsule a lot of people in almost all commercial inexpensive commercial. So for clues about India I hate the stuff in -- what it's -- which means to resist. Flexing a lot more -- to play around briefing which is really nice. -- you change."
" This -- car audio equipment and a previous life I added that there's an audio engineer for the good guys and independent and no matter what you do for yourself with -- if you've got a crappy cam powering it it's gonna sound crappy. So really -- get like a 120 dollar amp to power your giants have what we really want to get a better -- you know indeed too 400 watt range something really power the constable free and run. If you have a twenty dollar and it's gonna sound like a twenty dollar subwoofer no matter how."
" Good -- where something's for a -- twenty hours twenty dollar amp distorts -- light they're gonna melt down your subwoofer matter expensive it is. This particular supple for designer these for the fielding closure which gives a couple things one simpler construction. Two it also means it's not gonna be as efficient it's -- gonna need more air bridge. -- basically more watts actually out of your amp -- deliver the same sound pressure level out of it. So I'm go with my personal favorite -- audio makes amazing amplifiers is the 500 watt mono amplifier design for -- for use. And I just want to think Craig's list for making it easy to find used audio here being sold by kids who were upgrading 2001 amplifiers --"
" It's not take a moment to thank one of our sponsors Squarespace. Here to tell you -- are fabulous editor of release Leo. Hey everything of the editor system and I'm here to tell you about Squarespace the smarter web publishing site that takes the WTF. Out of blogging Squarespace is they fully hosted environments which means that you don't have to worry about installing any code on any server. That combined with the great template design and gotten to take advantage of their fourteen day free trial. I was up and running within an hour and that includes the complete importing of my previous blog with their import tools. And even better use that code system that SY ST and to get 10% off full life of your order. So head on over to Squarespace dot com and you won't be disappointed."
" If you can't when you're buying Exxon TV can actually you know the links you want you can usually get it creek cut from the people selling it to you it is very hard if you don't know what you're doing to cut some into the -- cut perfectly flat. Along cancer conference so if you can make sure you know the link and how the professionals cut it where it. Two. You're basically gonna be creating giant circles. And -- way to do that is actually Thursday -- attack you or routers it -- attachment that plugs in the middle of your your plywood and basically. Carves out a disk -- expense option is is it tool would -- tool free handing with the brouder. Or a jigsaw. No matter what tools -- is make sure if you're not using it perfectly accurate tool."
" If you cut a hole a little bit too small yeah. Because if it's too big you're gonna let air out and that's going to make yourself you're someone for some crap so if you're using -- and I -- and you're just following a line that you've drawn. Make sure when you cut that cut it just a little bit too small and that we can stand it out to make it bigger. Worker making up plug could get a little bit too large always easier to make a small hole a little bit bigger than it is to make it too big hole a little bit smaller. And so when you're slotting your solitude into your actual India and whatever using. That's that's the key there is as you want it as not a thing as possible it'll take you longer but it will sound better."
" To help out with the whole not having 88 basically -- the sealed enclosure you want. No -- keeping anywhere from two more things going to have -- we would lose their usual standby in the workshop. And basically silicone like colored silicone caulk and basically you run around all of the scenes inside the inside the -- for the building and basically it's your last line of defense against leaking air. What let's think you're gonna need is some kind of football like a speaker terminal play. And some wires that he can actually plug the signal from your amplifier. Into the tabs. So over -- she was kind of tell me that. Sixteen gauge wire should be more than enough to activists and that we'll see would have gotten giant magic box full copper I'm sure we can find some sixty -- wire so. Are you ready to capture lab on I will work with your personal. --"
" It's not affect what of the sponsors of today's episode system godaddy.com. Because smarter than the rest for a bit and you could win big. If smart -- from godaddy.com has changed the way you use the Internet the way you block the way to visit the way you live your life. Grade a blogger video story that shows how you might just -- 25000. In cash prizes and free smart space for life. So head over to godaddy.com slash -- contest and and are now. Don't have smart -- see what it's all about save an additional 15% through April 15 2009. You promote -- space fifteenth at the PTE 15 and whose favorite here it's that support us by supporting our sponsors."
" The trick to getting good design yourself look for ease of Reading the manual the actual subwoofer the driver itself. Well you can use on -- to create according designs the issue is that -- 123 was designed for sealed enclosure between point 51 point five cubic feet. That's we're building. Generally speaking smaller enclosure requires less hard drive the expenses -- Milan in a bigger enclosure will give you more -- will be quite so tight in the don't want more power. If you want each of -- on -- piece of -- to figure out the volume of cylinder -- volume -- you're going to build in the late you'll need to cut yourself attitude to by all means -- pencil out for everybody else had the excellent volume calculators and either of the twelve volt dot com home -- that. We've got links to the show notes. That in the height and diameter yourself wonder if you're good to go. The enclosure we're building is starting at the smallest recommending closure for subwoofer a little over half a cubic foot or nine inches and twelve points on it to you. A second enclosed will be at the maximum recommend sizes that are eighteen and twenty songs to you. If you have a table saw some tube is easy to cut. At the gate to the cylinder pipe you need -- to put both hands slide the softly in gently rotated three six degrees. We are delighted by house move become laws and policies -- circular saw hands or well. You literally just eliminated building four sides of the box but you do have to camp opens YouTube which means cutting circles. If we have around with the circle -- cutting the camps here to take minutes. So be liberated -- from the workshops will be reached -- that cutter which still had circle -- Unfortunately united boldly which broke and we didn't have anymore so we moved on the cutting holes free hand with around they've decided we should build in caps instant plug so we kind of circle the diameter of the outside of the -- into squares of -- a little bigger than two. Then cut to more squares for the actual caps into one of those squares you have a circle just like no -- book for -- to drop into you. Several years of free and grabbing later we raided the apartment -- We highly recommend wearing gloves for this annually to wet -- wipe up excess glue. We spread our clue what the directions on the container aligned or would -- now. Excuse Latin school in the inside of the -- with the sonic two was being inserted -- slid to be in place. Believe for the oxidant followed -- and -- And we grabbed the second set of hands to hold and in place what we used one last -- plant holder sand which have been caps and two together. If you don't have a giant pile of clamps around into a line with a single parent plants just do one section at a time. Verse one and the other and then all three pieces together. The process got a bit messy especially since I slather Dextre blu in the exterior joints between the two B in the end caps that was more than a little overkill and made for more than a little cleanup. But it's inspired me -- use liquid nails and contractors cement for the next enclosure scrub off include but trip. With the enclosure -- up encrypt this next to some twelve gage copper sixteen page would work fine we have heavier copper on hand. They get into overkill mode and side of the desk next to the subwoofer camps. The next morning after pulling clamps are routed to hold the terminal played Marcus group for the -- book cage removed it and drilled holes and mounted it and plays -- groups. But all the wires through its on them and the terminal play it doesn't work. Yeah."
" Thirty -- going -- 250 herds around 26 point seven hurts -- really. Can drops -- So my next step is going to be filling them with poly pill. That's gonna make enclosures in larger than the subwoofer -- that sense then to -- indexing closure which is gonna be at the maximum recommended for this or one and half cubic feet. Most going to be using this a circle -- guide me to take us about fifteen minutes the cutter would plug for eons before we blew it up. Instead of like three hours to apologists here -- and -- for that. In the next thing -- tell me who too -- borrowers used in caps I'll remind you a certain project you spent twelve hours on some. Are counted Polly -- we're looking at like twenty dollars and plywood ten dollars and silent too. Maybe five dollars in glue and screws. Sort maybe 5060 bucks for two enclosures not a bad deal that was limited time but hey you don't want its -- let's go back and Steve yeah."
" It's time to -- Netflix sponsored pick of the week this week but breakfast club does 1985 classic is a staple of many childhoods including my show starring -- mile west -- missing quite a few other members of the brat pack this film tells the tale of five high -- you'll spend today in detention together on a Saturday. Despite blog at different clicks the classmate soon discover well watch the movie he'll find out. What happens in this exploration unlikely friendships. Seriously put in your Netflix queue -- the other 89999. Titles Netflix has to offer including Blu-ray and -- them delivered to your door you're bound to find any title you're looking for. With forty shipping centers almost all deliveries happen in a single business day shipping both ways. For free. Plans start at four dollars and 99 cents the system be or you can get a free trial by signing up today. At Debbie -- W dot netflix.com slash system."
" One thing we forgot to show what we're in the nothing. That was actually I -- exactly yeah. That's the scary part is up Polly. Fiber fill if your speaker built you've probably heard the -- stuff through east at one point or another which is the idea that well it's interesting. If -- the speaker has almost always like fiberglass insulation or poly -- fiber it's essentially -- fiber used to stuff pillows you pick -- up a craft shop anywhere of that tonight even know who gates wore. Makes pillows and stuff in -- there and basically. Around a pound of it per cubic foot what it does is it slows down the movement of air inside the speaker and it's speaker enclosure. Essentially the politically behave as if it's larger up to up 40% margin in the actual physical size it's a really neat trick in basically an experimental putting more and list. -- fiber inside the speaker. To see just exactly what basically stuff to -- what what sounds the best you're you're just make sure it's none. Flammable which lies just -- piper and not the 1970s Europe insulation that you found him yet. Or had to build the perfect tool for network analysis penetration testing or just plain corporate espionage should must be that young men and women five. In the newest episode features a curious plus how -- rather of -- Cast Gibson's Hak5 every Wednesday and Easter revision3.com. Slash Hak5. And as always if you have any ideas comments or suggestions please email us at system at revision3.com. Don't forget to visit our forums at revision3.com/forum. And visit our archives at revision3.com slash system. I'm Patrick Norton -- about and we'll see you next week."
" No more waking up naked in the wrong state I own future. Yeah yeah. --"
" We're."
" What's really without -- degree of detail what the blockbuster movie Brokeback chicken button open -- to copy yet you're seeing. Without a serious subwoofer you could be missing out -- of a life expire pledges we're history how to build a subwoofer fast and cheap. On this episode of systm. This episode of systm is made possible by. Netflix Squarespace and godaddy.com. Well the system up Patrick Norton undergarments they screwed battle scene -- Abbas cello bass is critical in any audio setup could -- and extension that certain something the movies you watch or any music you listen to you. Great -- can cost. It cash experimenting with building your closures and get very expensive if you make any mistakes. In India are -- G. -- in the ability expo which advertises enclosures Hamachi to do that replete with something called. So on to and the usual pile parts so solitude is basically giant. Court or who it is designed for building quickly it's it's a concrete form material comes in can put links. What if you're building a great big building and you've seen those in the big -- right. Pillars in the middle of the building. It's a giant link to this stuff and cut it down the side of Italy and concrete pillars that prop from -- eighteenth two. I actually built an -- you. Using spear street stuff and they have been uncomfortable if sizes including besides. These double play around with that it is well it sounds. A big -- inspiration for this project is. Is -- past past lab he's epic on these audio engineer Andy had a bunch of subwoofer and was experimenting with side to. Ten -- Linksys onto the original product with two of them to collections of like forcible for each intense well Linksys on the -- The practical help hype -- it's an easy it's not going to fit in my truck at least not while still be able to drive. So we're scale things back to start with the really. Nice really inexpensive. So for -- for our -- she researched it at 123. One eloquently but you research. They make amazing so -- Mostly that you it's like the only -- bass speaker they sell you know sell pre built enclosures. -- At a few. So cool 175 -- your house which -- back it's -- ways like fifteen pounds. The song to -- the enclosure. Reason plywood the end capsule a lot of people in almost all commercial inexpensive commercial. So for clues about India I hate the stuff in -- what it's -- which means to resist. Flexing a lot more -- to play around briefing which is really nice. -- you change."
" This -- car audio equipment and a previous life I added that there's an audio engineer for the good guys and independent and no matter what you do for yourself with -- if you've got a crappy cam powering it it's gonna sound crappy. So really -- get like a 120 dollar amp to power your giants have what we really want to get a better -- you know indeed too 400 watt range something really power the constable free and run. If you have a twenty dollar and it's gonna sound like a twenty dollar subwoofer no matter how."
" Good -- where something's for a -- twenty hours twenty dollar amp distorts -- light they're gonna melt down your subwoofer matter expensive it is. This particular supple for designer these for the fielding closure which gives a couple things one simpler construction. Two it also means it's not gonna be as efficient it's -- gonna need more air bridge. -- basically more watts actually out of your amp -- deliver the same sound pressure level out of it. So I'm go with my personal favorite -- audio makes amazing amplifiers is the 500 watt mono amplifier design for -- for use. And I just want to think Craig's list for making it easy to find used audio here being sold by kids who were upgrading 2001 amplifiers --"
" It's not take a moment to thank one of our sponsors Squarespace. Here to tell you -- are fabulous editor of release Leo. Hey everything of the editor system and I'm here to tell you about Squarespace the smarter web publishing site that takes the WTF. Out of blogging Squarespace is they fully hosted environments which means that you don't have to worry about installing any code on any server. That combined with the great template design and gotten to take advantage of their fourteen day free trial. I was up and running within an hour and that includes the complete importing of my previous blog with their import tools. And even better use that code system that SY ST and to get 10% off full life of your order. So head on over to Squarespace dot com and you won't be disappointed."
" If you can't when you're buying Exxon TV can actually you know the links you want you can usually get it creek cut from the people selling it to you it is very hard if you don't know what you're doing to cut some into the -- cut perfectly flat. Along cancer conference so if you can make sure you know the link and how the professionals cut it where it. Two. You're basically gonna be creating giant circles. And -- way to do that is actually Thursday -- attack you or routers it -- attachment that plugs in the middle of your your plywood and basically. Carves out a disk -- expense option is is it tool would -- tool free handing with the brouder. Or a jigsaw. No matter what tools -- is make sure if you're not using it perfectly accurate tool."
" If you cut a hole a little bit too small yeah. Because if it's too big you're gonna let air out and that's going to make yourself you're someone for some crap so if you're using -- and I -- and you're just following a line that you've drawn. Make sure when you cut that cut it just a little bit too small and that we can stand it out to make it bigger. Worker making up plug could get a little bit too large always easier to make a small hole a little bit bigger than it is to make it too big hole a little bit smaller. And so when you're slotting your solitude into your actual India and whatever using. That's that's the key there is as you want it as not a thing as possible it'll take you longer but it will sound better."
" To help out with the whole not having 88 basically -- the sealed enclosure you want. No -- keeping anywhere from two more things going to have -- we would lose their usual standby in the workshop. And basically silicone like colored silicone caulk and basically you run around all of the scenes inside the inside the -- for the building and basically it's your last line of defense against leaking air. What let's think you're gonna need is some kind of football like a speaker terminal play. And some wires that he can actually plug the signal from your amplifier. Into the tabs. So over -- she was kind of tell me that. Sixteen gauge wire should be more than enough to activists and that we'll see would have gotten giant magic box full copper I'm sure we can find some sixty -- wire so. Are you ready to capture lab on I will work with your personal. --"
" It's not affect what of the sponsors of today's episode system godaddy.com. Because smarter than the rest for a bit and you could win big. If smart -- from godaddy.com has changed the way you use the Internet the way you block the way to visit the way you live your life. Grade a blogger video story that shows how you might just -- 25000. In cash prizes and free smart space for life. So head over to godaddy.com slash -- contest and and are now. Don't have smart -- see what it's all about save an additional 15% through April 15 2009. You promote -- space fifteenth at the PTE 15 and whose favorite here it's that support us by supporting our sponsors."
" The trick to getting good design yourself look for ease of Reading the manual the actual subwoofer the driver itself. Well you can use on -- to create according designs the issue is that -- 123 was designed for sealed enclosure between point 51 point five cubic feet. That's we're building. Generally speaking smaller enclosure requires less hard drive the expenses -- Milan in a bigger enclosure will give you more -- will be quite so tight in the don't want more power. If you want each of -- on -- piece of -- to figure out the volume of cylinder -- volume -- you're going to build in the late you'll need to cut yourself attitude to by all means -- pencil out for everybody else had the excellent volume calculators and either of the twelve volt dot com home -- that. We've got links to the show notes. That in the height and diameter yourself wonder if you're good to go. The enclosure we're building is starting at the smallest recommending closure for subwoofer a little over half a cubic foot or nine inches and twelve points on it to you. A second enclosed will be at the maximum recommend sizes that are eighteen and twenty songs to you. If you have a table saw some tube is easy to cut. At the gate to the cylinder pipe you need -- to put both hands slide the softly in gently rotated three six degrees. We are delighted by house move become laws and policies -- circular saw hands or well. You literally just eliminated building four sides of the box but you do have to camp opens YouTube which means cutting circles. If we have around with the circle -- cutting the camps here to take minutes. So be liberated -- from the workshops will be reached -- that cutter which still had circle -- Unfortunately united boldly which broke and we didn't have anymore so we moved on the cutting holes free hand with around they've decided we should build in caps instant plug so we kind of circle the diameter of the outside of the -- into squares of -- a little bigger than two. Then cut to more squares for the actual caps into one of those squares you have a circle just like no -- book for -- to drop into you. Several years of free and grabbing later we raided the apartment -- We highly recommend wearing gloves for this annually to wet -- wipe up excess glue. We spread our clue what the directions on the container aligned or would -- now. Excuse Latin school in the inside of the -- with the sonic two was being inserted -- slid to be in place. Believe for the oxidant followed -- and -- And we grabbed the second set of hands to hold and in place what we used one last -- plant holder sand which have been caps and two together. If you don't have a giant pile of clamps around into a line with a single parent plants just do one section at a time. Verse one and the other and then all three pieces together. The process got a bit messy especially since I slather Dextre blu in the exterior joints between the two B in the end caps that was more than a little overkill and made for more than a little cleanup. But it's inspired me -- use liquid nails and contractors cement for the next enclosure scrub off include but trip. With the enclosure -- up encrypt this next to some twelve gage copper sixteen page would work fine we have heavier copper on hand. They get into overkill mode and side of the desk next to the subwoofer camps. The next morning after pulling clamps are routed to hold the terminal played Marcus group for the -- book cage removed it and drilled holes and mounted it and plays -- groups. But all the wires through its on them and the terminal play it doesn't work. Yeah."
" Thirty -- going -- 250 herds around 26 point seven hurts -- really. Can drops -- So my next step is going to be filling them with poly pill. That's gonna make enclosures in larger than the subwoofer -- that sense then to -- indexing closure which is gonna be at the maximum recommended for this or one and half cubic feet. Most going to be using this a circle -- guide me to take us about fifteen minutes the cutter would plug for eons before we blew it up. Instead of like three hours to apologists here -- and -- for that. In the next thing -- tell me who too -- borrowers used in caps I'll remind you a certain project you spent twelve hours on some. Are counted Polly -- we're looking at like twenty dollars and plywood ten dollars and silent too. Maybe five dollars in glue and screws. Sort maybe 5060 bucks for two enclosures not a bad deal that was limited time but hey you don't want its -- let's go back and Steve yeah."
" It's time to -- Netflix sponsored pick of the week this week but breakfast club does 1985 classic is a staple of many childhoods including my show starring -- mile west -- missing quite a few other members of the brat pack this film tells the tale of five high -- you'll spend today in detention together on a Saturday. Despite blog at different clicks the classmate soon discover well watch the movie he'll find out. What happens in this exploration unlikely friendships. Seriously put in your Netflix queue -- the other 89999. Titles Netflix has to offer including Blu-ray and -- them delivered to your door you're bound to find any title you're looking for. With forty shipping centers almost all deliveries happen in a single business day shipping both ways. For free. Plans start at four dollars and 99 cents the system be or you can get a free trial by signing up today. At Debbie -- W dot netflix.com slash system."
" One thing we forgot to show what we're in the nothing. That was actually I -- exactly yeah. That's the scary part is up Polly. Fiber fill if your speaker built you've probably heard the -- stuff through east at one point or another which is the idea that well it's interesting. If -- the speaker has almost always like fiberglass insulation or poly -- fiber it's essentially -- fiber used to stuff pillows you pick -- up a craft shop anywhere of that tonight even know who gates wore. Makes pillows and stuff in -- there and basically. Around a pound of it per cubic foot what it does is it slows down the movement of air inside the speaker and it's speaker enclosure. Essentially the politically behave as if it's larger up to up 40% margin in the actual physical size it's a really neat trick in basically an experimental putting more and list. -- fiber inside the speaker. To see just exactly what basically stuff to -- what what sounds the best you're you're just make sure it's none. Flammable which lies just -- piper and not the 1970s Europe insulation that you found him yet. Or had to build the perfect tool for network analysis penetration testing or just plain corporate espionage should must be that young men and women five. In the newest episode features a curious plus how -- rather of -- Cast Gibson's Hak5 every Wednesday and Easter revision3.com. Slash Hak5. And as always if you have any ideas comments or suggestions please email us at system at revision3.com. Don't forget to visit our forums at revision3.com/forum. And visit our archives at revision3.com slash system. I'm Patrick Norton -- about and we'll see you next week."
" No more waking up naked in the wrong state I own future. Yeah yeah. --"
" We're."
dcalkins
Started discussion: March 23, 2009 @ 6:03pm GMT
Episode 96 - BUild your own subwoofer
Watch it just for the outtakes.
I swear to god I didn't know that they were running tape that whole time...
fishtoprecords
8 months ago
Outtakes were great. But didn't the show's lead in claim you would build both the short and tall versions? Only saw the short version.
And more importantly, how does it sound? I know, the streaming video can't replicate the awesome sound, but at least tell us if it was worth the time and energy.
And more importantly, how does it sound? I know, the streaming video can't replicate the awesome sound, but at least tell us if it was worth the time and energy.
afclark
8 months ago
I'm a little confused. Was this suppose to be a home or car subwoofer build? Patrick ran that Amp off a car battery. Is the battery that suppose to also sit in my living room? Is there a part II to this?
joel_p
8 months ago
thats for car audio applications...doesnt mean that you cant run that sub with a h/t system, if you can find an amp to run a 4ohm sub. Alot of the ones ive run into will run 8ohm. Also, the box design would have to be modified as well being that its designed to be run in a small space (car trunk or truck cab) vs a room. Im guessing that bandpass or vented enclosure would work better in that case.
just mah .02
just mah .02
c2s
8 months ago
Isn't mdf usually used because it's denser and doesn't have the harmonics of plywood?
I was expecting a cheap build. Like under $100 total.
I was expecting a cheap build. Like under $100 total.
ExodusFX
8 months ago
MDF is used because it has a lot of favorable properties, its density and it's super easy to cut & route.
The Rotozip bit looked like it broke because they were trying to cut through the wood in one pass. That spells death to many rotory bits. You only want to cut down as deep as the diameter of the bit, making multiple passes at progressively deeper levels.
As someone that works in car audio and builds enclosures, I didn't see a whole lot of point to this episode. If you were making reusable plugs so that you can play with different lengths of cylinders, that would make sense (or maybe a huge enclosure like el pipo). But if you're doing a single enclosure and have calculated the air space, the tools you used to make the cylinder enclosure would make a rectangular one just as easy and cheap. You used a table saw to cut the endcaps... the same table saw can cut 6 rectangular sheets to make a basic box. 4'x8' sheets of MDF are about $24 and can be cut down for you at the lumber yard for little or nothing. There was also way way way too much glue being used, but I'm pretty sure Patrick noted that.
Okay, I'll stop picking at the ep. =P I really did like this episode and hope this marks a return to the more hands-on, less type & click content!
The Rotozip bit looked like it broke because they were trying to cut through the wood in one pass. That spells death to many rotory bits. You only want to cut down as deep as the diameter of the bit, making multiple passes at progressively deeper levels.
As someone that works in car audio and builds enclosures, I didn't see a whole lot of point to this episode. If you were making reusable plugs so that you can play with different lengths of cylinders, that would make sense (or maybe a huge enclosure like el pipo). But if you're doing a single enclosure and have calculated the air space, the tools you used to make the cylinder enclosure would make a rectangular one just as easy and cheap. You used a table saw to cut the endcaps... the same table saw can cut 6 rectangular sheets to make a basic box. 4'x8' sheets of MDF are about $24 and can be cut down for you at the lumber yard for little or nothing. There was also way way way too much glue being used, but I'm pretty sure Patrick noted that.
Okay, I'll stop picking at the ep. =P I really did like this episode and hope this marks a return to the more hands-on, less type & click content!
Raybdbomb
8 months ago
You guys talked about budget, then you started talking about how a $200 component was "too cheap". I'm a little disappointed in that, I'm truly interested in making my own subwoofer, but my definition of "budget" differs greatly from yours, apparently.
kiwifrog
8 months ago
I liked it, loved the speed up bit while explaining in real time. Meant more was built without the silly questions slowing down the continuity.
For an ex audio man it's a shame Dave was so hands off this time around (he seamed a bit disinterested at the start, Nappies on the brain perhaps?(dippers I think you call them)).
I noticed the green-screen halo/aura showed up quite distinctly even in the low quality mode, I wonder if Dave's shirt meant they couldn't wind-up the keying level enough :) .
Keep up the build shows, systm is back at last (for now).
Mike.
For an ex audio man it's a shame Dave was so hands off this time around (he seamed a bit disinterested at the start, Nappies on the brain perhaps?(dippers I think you call them)).
I noticed the green-screen halo/aura showed up quite distinctly even in the low quality mode, I wonder if Dave's shirt meant they couldn't wind-up the keying level enough :) .
Keep up the build shows, systm is back at last (for now).
Mike.











It would have been the perfect episode to also include DIY tactile transducers aka 'bass shakers', easily made from big old speakers with broken cones: http://www.metacafe.com/watch/1008901/cool_bass_shaker/
Or if you can get hold of an Aura Interactor Vest or Aura Interactor Cushion (try eBay, they often go real cheap) you can extract a bass shaker from their innards and attach it to something more permanent like the seat of your car or sofa for films as an addition to your normal subwoofer.
I've got a couple of Aura AST-1B-4 Bass Shakers bolted to the back of my chair, great fun for typical hollywood action movies.
Someone should have inserted some explosion sounds into the whistling duet :D