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Anybody used sonotube for DIY speakers?
I was thinking of making some experimental boxes to try out diffrent speaker
unit combinations. Sonotube seems a useful idea with a top/bottom or front/back in my case. Anyone used it and can report on its acoustical properties? Andy === Andy Evans === Visit our Website:- http://www.artsandmedia.com Audio, music and health pages and interesting links. |
Anybody used sonotube for DIY speakers?
Andy Evans wrote:
I was thinking of making some experimental boxes to try out diffrent speaker unit combinations. Sonotube seems a useful idea with a top/bottom or front/back in my case. Anyone used it and can report on its acoustical properties? Andy The UK equivalent seems to be http://www.essextubes.com I haven't tried it yet. |
Anybody used sonotube for DIY speakers?
In article ,
Andy Evans wrote: I was thinking of making some experimental boxes to try out diffrent speaker unit combinations. Sonotube seems a useful idea with a top/bottom or front/back in my case. Anyone used it and can report on its acoustical properties? Andy You certainly seem to be searching for something, Andy. Do you know what it is? ;-) -- *Laugh alone and the world thinks you're an idiot. Dave Plowman London SW To e-mail, change noise into sound. |
Anybody used sonotube for DIY speakers?
You certainly seem to be searching for something, Andy. Do you know what
it is? ;-) Yep - a simple non-resonant enclosure that I can try out some units in. I'm going to start with 5" units in a 2-way. I have KEF B110 and some alu cone speakers coming. Curious about Morel MW144 and one or two of the SEAS excels. I have a few tweeters, inc. Decca Ribbons. I was thinking of a square alu front - 1/4 ins say - the sonotube behind it (probably 12"dia, and 12" front to back to give 20litres - ish) and a square of something on the back. Held together on the outside by four long bolts front to back. I would like to get some sand into the proceedings, possibly a longer tube with twin walls and sand between, but a simple box will get me going. === Andy Evans === Visit our Website:- http://www.artsandmedia.com Audio, music and health pages and interesting links. |
Anybody used sonotube for DIY speakers?
Phoned Essextubes, and they have 12" dia in 6mm to 15mm thick. The 15mm sounds
rather useful. === Andy Evans === Visit our Website:- http://www.artsandmedia.com Audio, music and health pages and interesting links. |
Anybody used sonotube for DIY speakers?
In message , Andy Evans
writes Phoned Essextubes, and they have 12" dia in 6mm to 15mm thick. The 15mm sounds rather useful. === Andy Evans === Visit our Website:- http://www.artsandmedia.com Audio, music and health pages and interesting links. Do they sell to private individuals? -- Chris Morriss |
Anybody used sonotube for DIY speakers?
Do they sell to private individuals?
Yes indeed. The off the shelf units are 6mm thick, and cost about £40 for lengths of one or two metres delivered - that's for 12" dia. They also do 10" dia, so the cool thing would be to put sand in between. Sandwich between a front plate and back plate, tighten up four threaded rods at the corners and yu have yur speaker. that wasn't difficult! === Andy Evans === Visit our Website:- http://www.artsandmedia.com Audio, music and health pages and interesting links. |
Anybody used sonotube for DIY speakers?
www.alexander-schmidt.de/smsspr.htm
Your point being? === Andy Evans === Visit our Website:- http://www.artsandmedia.com Audio, music and health pages and interesting links. |
Anybody used sonotube for DIY speakers?
"Andy Evans" wrote in message
I was thinking of making some experimental boxes to try out diffrent speaker unit combinations. Sonotube seems a useful idea with a top/bottom or front/back in my case. Anyone used it and can report on its acoustical properties? Andy I have several friends who have used Sonotube in various configurations. One made a tower by slitting a sonotube and bonding a wooden mounting plate to the side of the tube. Others have added tops and bottoms and used them as subwoofer enclosures with the woofer mounted on one end. http://www.lungster.com/l/speakers/sonotubefaq.html http://kahuna.sdsu.edu/~tucker/diyaudio/diyaudio.html http://www.passdiy.com/pdf/el-pipe-o.pdf IOW search google yourself... |
Anybody used sonotube for DIY speakers?
Does anybody know the effects of back radiation on the cone. The simple method
of dealing with this is to stuff behind the speaker, or indeed to have cabinets with odd dimensions to avoid standing waves. But I'm thinking that the actual length of enclosure behind the cone is important. Hence my plan was to use a larger diameter sonotube horizontally, rather than a slim one vertically. === Andy Evans === Visit our Website:- http://www.artsandmedia.com Audio, music and health pages and interesting links. |
Anybody used sonotube for DIY speakers?
On 17 Nov 2004 14:34:27 GMT, ohawker (Andy
Evans) wrote: Does anybody know the effects of back radiation on the cone. The simple method of dealing with this is to stuff behind the speaker, or indeed to have cabinets with odd dimensions to avoid standing waves. But I'm thinking that the actual length of enclosure behind the cone is important. Hence my plan was to use a larger diameter sonotube horizontally, rather than a slim one vertically. === Andy Evans === Visit our Website:- http://www.artsandmedia.com Audio, music and health pages and interesting links. Sound really doesn't know much about whether it is going vertically or horizontally - so no problem there. If this is for a subwoofer, standing waves inside the cabinet simply aren't going to happen - the dimensions are far too small. They will happen in the room, though, which is a vastly bigger problem. But how do you propose to use the tube? There are really three ways. The first is to simply use it as a cabinet, that just happens to be round. The standard calculations apply, and you can make it sealed for best sound or ported for maximum oomph. Second, you could use it as a transmission line, with enough padding to absorb the entire back wave along the length, resulting in an effectively infinite baffle - a little like the response of designs used by me (built into a huge unused concrete cupboard) or Stewart (into a roof void). This is another maximally flat design that yields true bass extension without all the bloated thud of the typical home theatre speaker. Thirdly, you can make it a half wave long at Fs and pad it lightly enough that some energy emerges from the far end to prop up the bass response a bit. It will be good for movies, but not so great for music. d Pearce Consulting http://www.pearce.uk.com |
Anybody used sonotube for DIY speakers?
"Andy Evans" wrote in message
Does anybody know the effects of back radiation on the cone. It can be very significant. The simple method of dealing with this is to stuff behind the speaker, or indeed to have cabinets with odd dimensions to avoid standing waves. Some of the sonotube subwoofer enclosures I've seen were 6 to 12 feet long. There could be a lot of *organ pipe* resonances if the tube was not properly stuffed. But I'm thinking that the actual length of enclosure behind the cone is important. It definately can be signficant. After all, that's what ported enclosures work with, as do the unported ones. Hence my plan was to use a larger diameter sonotube horizontally, rather than a slim one vertically. Consider the well-stuffed tube as a very lossy transmission line... |
Anybody used sonotube for DIY speakers?
On Wed, 17 Nov 2004 14:57:33 +0000, Don Pearce wrote:
snip Thirdly, you can make it a half wave long at Fs and pad it lightly enough that some energy emerges from the far end to prop up the bass response a bit. It will be good for movies, but not so great for music. Surely a 1/2 wave pipe will have a standing node at both ends so no (or little) sound will come out of the other end at Fs will it? Shouldn't it be 1/4 wave at Fs? -- Mick (no M$ software on here... :-) ) Web: http://www.nascom.info Web: http://projectedsound.tk |
Anybody used sonotube for DIY speakers?
On Wed, 17 Nov 2004 18:01:59 GMT, mick wrote:
On Wed, 17 Nov 2004 14:57:33 +0000, Don Pearce wrote: snip Thirdly, you can make it a half wave long at Fs and pad it lightly enough that some energy emerges from the far end to prop up the bass response a bit. It will be good for movies, but not so great for music. Surely a 1/2 wave pipe will have a standing node at both ends so no (or little) sound will come out of the other end at Fs will it? Shouldn't it be 1/4 wave at Fs? The damping ensures that there is no standing wave. And by making it half a wave long, and adding the effective half wave shift caused by using the back wave, the sound emerging from the end of the pipe is in phase with the front radiation. This is pretty much analogous to what happens at the port of a reflex speaker and the overall effect is also pretty much the same. d Pearce Consulting http://www.pearce.uk.com |
Anybody used sonotube for DIY speakers?
Don - I was thinking of ported. If I use a 5" I can get decent bass from a
ported 21 litre enclosure with one of two drivers like the MW144 for instance. Decent = reasonable response at 40hz. === Andy Evans === Visit our Website:- http://www.artsandmedia.com Audio, music and health pages and interesting links. |
Anybody used sonotube for DIY speakers?
But I'm thinking that the actual length of enclosure behind the cone is
important. It definately can be signficant. After all, that's what ported enclosures work with, as do the unported ones. Hello Arny - thanks for contributing. Yes - I mean what you point out, that a good distance behids the cone is better than being tight up against a back wall as it would be in a tall narrow enclosure. e.g. I heard Jordan JX92Ss in a TL enclosure where the back wall was a bare 6 or 8 inches behind the cone - surely you'll get reflections back into the cone? === Andy Evans === Visit our Website:- http://www.artsandmedia.com Audio, music and health pages and interesting links. |
Anybody used sonotube for DIY speakers?
On 17 Nov 2004 20:12:45 GMT, ohawker (Andy
Evans) wrote: Don - I was thinking of ported. If I use a 5" I can get decent bass from a ported 21 litre enclosure with one of two drivers like the MW144 for instance. Decent = reasonable response at 40hz. It is certainly going to be dropping a bit by 40Hz, but it won't be very loud in the bass. At 5" diameter you need a great deal more than the 3.5mm displacement of this unit to make any serious amount of bass noise. My Adire tempest is 15 inches, and has plus or minus 16mm of movement - that is more like the sort of thing you should be aiming at. OK, you can't put that sort of diameter into the tube, but to get the volume you must compensate by greater excursion. Two drivers help, but you must then use double the cabinet volume for the same shape response. d Pearce Consulting http://www.pearce.uk.com |
Anybody used sonotube for DIY speakers?
It is certainly going to be dropping a bit by 40Hz, but it won't be
very loud in the bass. At 5" diameter you need a great deal more than the 3.5mm displacement of this unit to make any serious amount of bass noise. It could be better than expected. I've looked at the fr plots on DIY sites, and they're not bad for the MW144, plus I've heard one with a ribbon tweeter at the HIFi show and it was pretty nice. === Andy Evans === Visit our Website:- http://www.artsandmedia.com Audio, music and health pages and interesting links. |
Anybody used sonotube for DIY speakers?
"Andy Evans" wrote in message
But I'm thinking that the actual length of enclosure behind the cone is important. It definately can be signficant. After all, that's what ported enclosures work with, as do the unported ones. Hello Arny - thanks for contributing. Yes - I mean what you point out, that a good distance behids the cone is better than being tight up against a back wall as it would be in a tall narrow enclosure. Agreed. e.g. I heard Jordan JX92Ss in a TL enclosure where the back wall was a bare 6 or 8 inches behind the cone - surely you'll get reflections back into the cone? It happens. |
Anybody used sonotube for DIY speakers?
On Wed, 17 Nov 2004 20:57:27 -0500, "Arny Krueger"
wrote: "Andy Evans" wrote in message But I'm thinking that the actual length of enclosure behind the cone is important. It definately can be signficant. After all, that's what ported enclosures work with, as do the unported ones. Hello Arny - thanks for contributing. Yes - I mean what you point out, that a good distance behids the cone is better than being tight up against a back wall as it would be in a tall narrow enclosure. Agreed. e.g. I heard Jordan JX92Ss in a TL enclosure where the back wall was a bare 6 or 8 inches behind the cone - surely you'll get reflections back into the cone? It happens. It can be avoided by placing an angled plate behind the driver, which will reflect rear radiation down the pipe rather than back at the driver. In a Sonotube, this will of course require you to be able to cut an oval with angled edges. -- Stewart Pinkerton | Music is Art - Audio is Engineering |
Anybody used sonotube for DIY speakers?
|
Anybody used sonotube for DIY speakers?
You have to know at what SPL the FR was taken. As noted, you just can't move
much air with this driver, and deep bass is all about moving air! Yes - that's a good point. I don't need deep bass - as long as I can hear a decent low E, or even a low E which sounds decent because the harmonics are strong. I think from memory that's 32 hz === Andy Evans === Visit our Website:- http://www.artsandmedia.com Audio, music and health pages and interesting links. |
Anybody used sonotube for DIY speakers?
In a Sonotube, this will of course require you to be able to cut an oval with
angled edges. That thought had indeed crossed my mind! That's why I'll go for length behind the driver. === Andy Evans === Visit our Website:- http://www.artsandmedia.com Audio, music and health pages and interesting links. |
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