Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 30th October 2004, 03:12 PM   #1
diyAudio Member
 
BlackCatSound's Avatar
 
Join Date: Oct 2004
Default Volt in a TL

Click the image to open in full size.

My first go at a TL design. The driver is a Volt D2500.1 10". The line is 1xSd and 8ft long.

The box on top is not going to be part of this system, thats a seperate project to make some bookshelf speakers with an Audax aerogel and a tweet I've had lying around. Its just being used to provide the top end at the moment.

Eventually the Volt will go into a 3 way active system, just experimenting with box design. I've got its brother in a ported box (the one hiding behind the TL).
  Reply With Quote
Old 31st October 2004, 08:43 AM   #2
weidok is offline weidok  Netherlands
diyAudio Member
 
weidok's Avatar
 
Join Date: Jan 2004
Location: dkm
Hi looks great..

Why is the port so close to the woofer???

I'll think is is better to have the port
at the bottum in front or back of the speaker???
__________________
There is NoBox like NoBox
  Reply With Quote
Old 31st October 2004, 09:23 AM   #3
Riku-78 is offline Riku-78  Finland
diyAudio Member
 
Join Date: Oct 2004
I think that it's fairly common to build transmission lines like that. Most designs I have seen have had BOTH the woofer and the port in the bottom, but I don't understand why turning the thing upside down would hurt in any way.

In most TL designs the line starts and ends in the same end of the cabinet. There are, of course, some more complex designs (check this).
  Reply With Quote
Old 31st October 2004, 09:36 AM   #4
Nuuk is offline Nuuk  United Kingdom
diyAudio Member
 
Nuuk's Avatar
 
Join Date: Feb 2003
Location: Somerset, SW England
Quote:
In most TL designs the line starts and ends in the same end of the cabinet. There are, of course, some more complex designs (check this).
Most of the TL designs that I have seen the driver and port are at different ends! I'm not sure if I am too impressed by this quote from the PMC page.

Quote:
The most predictable and accurate absorber is a highly specified foam material that took a vast amount of R&D to derive the correct formula of profile, pore size and density of the polymer. The foam, probably the least visually dramatic of the components is tremendously important.
Looks like the usual egg-crate profiled foam to me!
__________________
The truth need not be veiled, for it veils itself from the eyes of the ignorant.
  Reply With Quote
Old 31st October 2004, 09:45 AM   #5
frasse is offline frasse  Sweden
diyAudio Member
 
Join Date: Oct 2004
Hi this is my tl experiment the driver is a ss 21w/8555 its been playing for 2 years no and im thinking of finnish the box. More pics if intresting.
Attached Images
File Type: jpg tllada31.jpg (43.3 KB, 325 views)
  Reply With Quote
Old 31st October 2004, 09:49 AM   #6
Riku-78 is offline Riku-78  Finland
diyAudio Member
 
Join Date: Oct 2004
Quote:
Looks like the usual egg-crate profiled foam to me!
To me, too... But I'd sure like to hear what those things sound like. After all, TL cabinets are usually a bit larger than that.
  Reply With Quote
Old 31st October 2004, 10:23 AM   #7
diyAudio Member
 
RobWells's Avatar
 
Join Date: Aug 2002
Location: UK
Quote:
Originally posted by Riku-78


To me, too... But I'd sure like to hear what those things sound like. After all, TL cabinets are usually a bit larger than that.
I've heard these in a stereo setup and I liked them.

http://www.pmcloudspeaker.com/ib1s.html

Not much help for your ears though

Blackcatsound, if you put the driver at the bottom (turn it upside down) doesn't it help eliminate a 'floor bounce' problem ?

Cheers,

Rob
  Reply With Quote
Old 31st October 2004, 11:10 AM   #8
Riku-78 is offline Riku-78  Finland
diyAudio Member
 
Join Date: Oct 2004
Well, they cost a fortune, so they really should sound quite nice...
  Reply With Quote
Old 31st October 2004, 01:04 PM   #9
Nuuk is offline Nuuk  United Kingdom
diyAudio Member
 
Nuuk's Avatar
 
Join Date: Feb 2003
Location: Somerset, SW England
Why not build some and see (or hear) what they are like? The cabinets are relatively small so material costs are minimal (especially if you look out for scrap materials).

I very much like my TL woofers (used with OB's) and if I was making a small active speaker, would be very tempted to try the TL approach!
__________________
The truth need not be veiled, for it veils itself from the eyes of the ignorant.
  Reply With Quote
Old 31st October 2004, 02:58 PM   #10
Riku-78 is offline Riku-78  Finland
diyAudio Member
 
Join Date: Oct 2004
To tell you the truth, that's the "experimental" part of my active monitor project--trying to build a small TL like theirs. The point is I think their talk about the huge amount of damping R&D is just marketing [grass after being processed by a male cow]. I'm going to try a similar design with just ordinary foam and Acousta Stuf.

I can probably get myself into an anechoic chamber with loads of Brel & Kjr stuff in spring... I will post some results then. But first I should build the thing.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Switching 230 Volt Transformer to 120 Volt OMNIFEX Parts 10 6th April 2008 04:34 PM
12 volt subwoofer amp? roundel325 Class D 5 11th December 2006 04:18 AM
Can I use-35-0-35 volt DC for Leach Amp? Wynand Solid State 9 11th August 2005 07:24 AM
9 volt DC to 48V DC Ricren Parts 12 19th October 2004 08:02 PM
12 volt DC to 9 volt AC eRiCdWoNg Parts 10 18th April 2004 01:52 PM


New To Site? Need Help?

All times are GMT. The time now is 08:52 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2