What's new

15" Dual Voice Canon is ready.. almost (1 Viewer)

Jedd

Second Unit
Joined
Feb 5, 2002
Messages
298
Finally. I finished assembling of my tube last night, put it in the side firing position (endcaps have square form) and.. went into the bed. Well, it was about 1am. So, the whole night I was "the dreaming man shooting at the world". :D
The first thing in the morning was some Deep Purple, Led Zeppelin and LOTR trailers, to hear what I've got.
OMFG! (especially when The Ring hits the floor in the Bilbo's house. I can feel it in my butt, chair, basement, house and neighbors where excited too, I bet :laugh: ).
But not everything is so good as I would like it to be.
1) a lot of noise, hum and buzz - I didn't my finish cables yet, so had to connect everything with simple non shielded RCA-end wires. I hope I'll get some improvements when I replace them with #RG6 quad + Centerpin(r) RCA's#
2) bass is delayed. It's hard to describe, but I feel like it just a bit late. "Woof" - say the main speakers, "woooooof" answers the sub, like an echo. (very powerful one). :frowning: At this point, I'm not sure what to do, maybe some phase tweaking will help.
P.S. canon is not a canon, it's just a cannon. :b
 

Jedd

Second Unit
Joined
Feb 5, 2002
Messages
298
Borrowed a digital camera from a friend of mine. Here we go (the link is slow, so it will take some time to load):
Photo 1
HTPC room view.
Photo 2
Getting closer to the sub.
Photo 3
Without flash.
Photo 4
Side view.
Photo 5
Rear endcap. I feel I have to marry this sub after everything I did with it from the rear. :D
Photo 6
Where does he crawl?
Just a weird looking angle.
(Admin changed images to clickable links to speed up page load)
P.S. kewl, didnt know how to do it.
 

Jedd

Second Unit
Joined
Feb 5, 2002
Messages
298
Probably it is the cheapest 15" DVC powered sub in the world. (prices include shipping and taxes)
Endcaps: MDF 2x4 + BB 2x4 = $22 (HD)
Tube: 22"x2 = $23 + free t-short. ;) (White Cap)
250 PE Amp = $105 (MCM)
15" Dayton DVC = $112 (PE)
polyfill + sock = $14 (JoAnn)
1 tube of liq. nail = $3 (HD)
some caulk and nails = free (garbage heap in the basement :D )
-------------------------
total = $280
Instrument used: sabresaw, power drill.
Can be done in two days without any hassle if you have all parts ready.
Also what I noticed - you don't need to paint the tube if you use black lycra.
Actually, I am interested in your walls.. are those real seashells in concrete? Neat.
Yeah. As they say - 100% real. Collected all shells on CapeCod last summer and flushed into the layer of concrete.
 

Jeffrey Noel

Screenwriter
Joined
Sep 11, 2001
Messages
1,533
That's a pretty cool, and easy, design you got there Jedd. How does it sound? Does it meet your expectations?
BTW, I think it's about time for a computer desk huh? :D
 

Jedd

Second Unit
Joined
Feb 5, 2002
Messages
298
Thanks,
I've changed the design several times (and annoyed everyone here ;) ), after all I came up with this one as the most compact. It fits into 2'x2' virtual cube.
Not too much I can say about the sound, because I never heard a sub before. I do believe it will kick out any commercial sub from the bestbuy in the terms of shaking-my-butt ability, but I'm not sure about the accuracy.
See my first post in this thread.
Anyone in Boston area who would like to test it? :rolleyes
Yeah the next project is computer table and speaker stands. :D
 

Patrick Sun

Senior HTF Member
Joined
Jun 30, 1999
Messages
39,408
Jedd, have you reversed the polarity on the leads to the driver from the amp (just reverse the positive and negative amp leads to the driver)? That might get rid of the delay you are hearing.
 

ThomasW

Senior HTF Member
Joined
Nov 6, 1999
Messages
2,282
Jedd

You'll get better sound quality if you put the mains on some stands and place them 1/3rd the width of the room in from the side walls and out 4' or so from the backwall.

Having the sub in the corner of the basement will result in a ton of room gain since there are no bass losses through concrete walls
 

Jedd

Second Unit
Joined
Feb 5, 2002
Messages
298
you'll get better sound quality if you put the mains on some stands and place them 1/3rd the width of the room in from the side walls
Room Photo
Room is about 12' wide. Usually I just lay down on the carpet. :)
Right now mains are about 3' from nearest walls wall. When I get rid of the bookshelf in the corner and finish new cables I could play with sub/speaker placement. I hope it will help.
 

Bryan Michael

Supporting Actor
Joined
Mar 2, 2002
Messages
564
if that is a hk recever you might have delay settings i have one for my onkyo i set the distance that all speakers are from my sewwt spot so it get the delays right
 

Cam S

Screenwriter
Joined
Jan 11, 2002
Messages
1,524
Jedd, nice looking sub. What is the internal volume of the tube?

BTW, that wall you have is really interesting, how long did it take to finish it?
 

Jon Torres

Second Unit
Joined
Dec 30, 2001
Messages
288
It looks real good. I'm guessing the MDF is for a circular plug for the sonotube, right? If so, how did you cut it out w/ only the sabresaw and powerdrill? Thanks.
 

Jedd

Second Unit
Joined
Feb 5, 2002
Messages
298
I'm guessing the MDF is for a circular plug for the sonotube, right? If so, how did you cut it out w/ only the sabresaw and powerdrill?
Right, so the only thing i had to cut - 2 sheets of mdf. You can cut it like a butter with a hot knife if you have a sibresaw.

I found a center of the mdf square. Predrilled a small hole, scratched two circles using short wooden plank with 2 screws in it (11" in the first and 7" in the second case).

Outer circle is easy - you just saw it following the circle.

For the inner circle you need to drill a big hole somewhere, so you can stick saber in it and finish the sawing.

I was trying to use RotoZip too to make this cuts, but decided to use sabresaw after all - because it gives you much more precise cuts and 10 times less dust.
 

Users who are viewing this thread

Forum Sponsors

Forum statistics

Threads
348,383
Messages
4,843,949
Members
142,308
Latest member
kp100
Recent bookmarks
0
Top