Heavely modified Pensil P70, or how to do a ML-TQWT for the CHP-70 - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range

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 11th March 2011, 11:18 AM   #1
Squeak is offline Squeak  Denmark
diyAudio Member
 
Squeak's Avatar
 
Join Date: Jul 2007
Location: Frederiksberg
Default Heavely modified Pensil P70, or how to do a ML-TQWT for the CHP-70

I want to build a simple transmission line, like the Pensils for the CHP-70.
I have some special requirements and questions though:

- I want the cross-section to be square, not a rectangle like the Pensil. I know it's rectangular to minimise standing waves, but seeing as the microtowers gets on fine with a rectangular crossection I figure with the right stuffing there should be no problem?
The square looks equally small from all sides, is easy to position right and has better balance.

- I want the driver hight to be 105 cm, which is exact sitting ear-hight for the people it's intended for, to make the most of the dispersion pattern. So we are talking 115 cm outside hight.
What does that mean for the rest of the speaker? Should it be slimmer, or fatter with a different tuning? Could I subtract enough space by putting in a slanted board at the bottom, reflector style? Or would a slanted wall destroy the wanted resonance?
I could also just raise the whole speaker and put a reflector under a down firing port like the half Chili Chang.

- You don't hear much about the ML-TQWT approach for the MA drivers. Are they unsuited for the loading method with their higher Qts? The frugal horn Mk3 seems like an instance of a TQWT though, with the port a little larger than usual.
It would seem ideal to have quarter wave tuning in a cab where the speaker is at the very top.
Seeing as it's so very easy to do building wise (only a slanted board), this must be a for a reason, right?

Last edited by Squeak; 11th March 2011 at 11:34 AM.
  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
chr-70 vs. chp-70? Sonogasm Full Range 10 26th November 2011 06:02 PM
Looks matter: What's the cheapest/easiest way to get the caramel bezel CHP-70 in EU? Squeak Full Range 38 25th May 2011 10:00 PM
CHR-70, CHP-70, Alpair 7 Desktops - Japan markaudio Full Range 4 1st February 2010 02:42 AM
ML-TL or ML-TQWT with very low Qt driver Henkjan Full Range 6 29th September 2006 03:29 PM
Small box for FE103 - ML TL or ML TQWT? ChuckT Full Range 15 28th July 2004 06:56 AM


New To Site? Need Help?

All times are GMT. The time now is 04:46 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