using sonotube in a 2way design?

Status
Not open for further replies.
Jump to Latest
C

chrisfrost82

Member
Joined 2003
#1
has anyone ever done this or would it be possible. if i decide to do this i had thought about making a convex top and bottom, so there is no flat spaces at all inthe tube. building my flat baffles out of MDF and fiberglassing them to the tube. i figure should be a very sound eclosure, but i may be wrong. any help would be appreciated
 
#4
Aaron Gilbert's Emerald Towers

You should take a peak at Aaron Gilbert's Emerald Towers. Made from Cubicorn tubes and covered with green velvet, hence the name. Sounded pretty good too.
 

Attachments

  • aaron-green-monster.jpg
    aaron-green-monster.jpg
    60.5 KB · Views: 406
#8
I probably misunderstood. I was assuming you were putting the sonotube inside an MDF enclosure. Creating an elliptical interior is a worthwhile goal. To eliminate the parallel surfaces of the top and bottom just put a sand filled sock in the bottom and tie it down with a zip tie to an eye screw.
(sock idea courtesy of Steve Margolis aka )
7V )
 
#9
i just plan to use the fiberglass to secure and close the gaps from the mdf to the sonotube. i do not plan to crush the tube at all. i have seen someones line array where they crused part of the tube to make it flat. i dont really want to do that, i would just prefer to keep everything round. only reason for me choosing sonotube is cause i can get it locally, dont want to pay the herendous expense of shipping Cubicon 🙂 cheapy i am. i already have 2 way towers MTM design built out of MDF using parallel sides (i know i know) drivers consist of 2 Audax HT170f0 6.5" midrange/bass and 1 Morel MDT30s tweet per tower and same config for my center channel. using just a single 6.5 and tweet for surrounds. Xover was designed and built by madisound (first set of HT speakers, still kinda new, didn't want to mess with it right now) used all Sidewinder. poly, expensive things they were. but as of now tower are not finished still raw state. 1.2 cubes tuned to 50hz sound nice, but i think they could use a little help on the lower end, not quite what i expected. for my subwoofer(s) i am using 2 eclipse aluminum 12's 88012 or something like that. only running 1 as of now in a 3.5 cube box tuned to 24hz. running off a PE 250w plate amp. i have my Crown XLS402 sitting here but i think i broke it, wont get into that right now. but that is an over view of what i have so far. oh and for reciever i got a Sony Str-de875 5.1 100x5 at 8ohm, does me nice, looking to upgrade. thanks for reading this if you made it all the way through 🙂

Chris
 
#10
Sony Str-de875, thats the one with the pretty blue DTS light!
Stare at that big blue LED too long and you'll go cross eyed...

Its a good unit for the $$$ spent, pity about the matching 5 disc carasole DVD player...peice of junk(DVP nc600)skip skip skip skip skip is all it does!(even on brand new never been played disc's)
 
#15
well i had just been reminded of something, using a spherical back wouldcreat equal distance betweet every point which inturn would be a bad thing for standing waves so in this case they would not sound so good.

all i want are round odd looking towers that sound good, i want them to draw attention cause of their looks and sound. i mean is that to much to ask 🙂
 
#16
Yes, it's true that a cylinder has an infinite number of eigenmodes that sum to a single series of peaks/nulls, but unless the tube is fairly large, are easily damped with a hanging acoustic 'blanket'.

1" insulating fiberglass can effectively damp down to ~250Hz, so as long as the tube's diameter is <13560/2/250 = <27.12", then suspending a piece the diameter/length of the tube suffices and doesn't damp the pipe's modes too much if vented. If sealed, or for some reason you want to damp the pipe modes more, then place it diagonally to aperiodically damp them.

GM
 
#17
I built a speaker many years ago using an eight inch dia inside a 10" dia and filled the gap with fine play sand making a rock hard, nonresonant tube that stood up 36" then bent 60 degrees toward the listener so a flat face pointed foward and slightly up. I mounted the 18W8544 scanspeak in the face and made a little top housing for the tweeter. I called it my 'parascope' design and until the Northridge earthquake it was great! The bend was simply made by cutting the sonotube at the desired angle then gluing it together. The bend also broke up resonances that might have been set up in the tube.
 
Status
Not open for further replies.
Top Bottom