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 27th June 2005, 05:31 AM   #1
scooby1 is offline scooby1  Australia
diyAudio Member
 
Join Date: Jun 2005
Location: vic aus
Send a message via MSN to scooby1
Talking t-line enclosure for focal polykevlar ? please!!!

hello there speaker junkies, i have been lucky enough to aquire two focal polykevlar 6.5"woofer and am hoping someone out there could tell me if a t-line is feasible. here are specs... thanks
fs 52hz
vas 16.1 L
Qts .39 Qes .41 Qms 7.41

Sd 124.7 cm2
x max 3.5
Re 5.8 ohms
sens 89.2db
i have been given one suggestion of line 63" at sd x1.
I am looking to make a folded line similar to pmc design.
cheers and thanks
  Reply With Quote
Old 27th June 2005, 05:44 PM   #2
Greg B is offline Greg B  United States
diyAudio Member
 
Join Date: May 2004
Location: Los Angeles, California
Offhand, I'd say those are more suited to a tower type bass reflex, AKA MLTL. Focal drivers tend to work well in these. For a time many of their kits used them. This is basically a stretched BR ~1m tall with a port at the bottom. The pipe action tends to pump up the midbass a bit - exactly where you'd typically have a dip in a too big BR with a lowish Q driver.

They might be OK in a 'pure' TL if you are using a high output impedance source, a SET tube amp for example.

The whole notion of Sd as a design parameter is pretty outmoded. Line volume depends on Vas etc. Definitely read through Martin King's TL site, www.quarter-wave.com.

GB
  Reply With Quote
Old 28th June 2005, 06:47 AM   #3
scooby1 is offline scooby1  Australia
diyAudio Member
 
Join Date: Jun 2005
Location: vic aus
Send a message via MSN to scooby1
yes i think a BL or MLBL might be the go as it is my first project..i think it must me the design concept that excites me though, i have tried MJK mathcad and i dont think its working for me? plus i truly only got my first computer 2 mths ago!! very interested just lacking skills at this stage all responses are very welcome indeed
  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
Focal-JMlab 5W4252 5 1/4 and Hi-Vi RT1-II custom built speakers w/crossover+enclosure excetara2 Swap Meet 4 18th October 2006 06:53 PM
Any theoretical or sonic advantage to a sealed versus T-line enclosure?? jjkozlow Subwoofers 18 26th October 2005 03:17 AM
Enclosure and Woofer for Focal TC120k ppmmcc Multi-Way 7 10th February 2004 11:49 AM
Focal 10V6412 in Transmission Line panterka Multi-Way 5 19th November 2003 12:44 AM
MTM design FOCAL 6W4311 AND FOCAL Focal TC120 Tdx2 Bas Horneman Multi-Way 1 5th February 2003 04:21 PM


New To Site? Need Help?

All times are GMT. The time now is 06:53 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