Go Back   Home > Forums > >

Multi-Way Conventional loudspeakers with crossovers

From TW to TMWW ?
From TW to TMWW ?
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
Old 1st September 2011, 04:07 AM   #1
qguy is offline qguy  Canada
diyAudio Member
 
Join Date: Mar 2005
Location: Burnaby
Send a message via AIM to qguy Send a message via MSN to qguy Send a message via Yahoo to qguy
Default From TW to TMWW ?

I am planning to upgrade my bookshelves to Floorstanders, I was thinking of going for a Zaph ZRT 2.5 ways. Considering that I have a bookshelves with one Usher 9950 tweeter and one Usher 8945 7 inch woofer. Would adding two 8 inch woofers ala Wilson Watt Puppy be a good move or should I just go for a new DIY Floorstander. I understand that I would need to modify the existing crossovers for the woofer and add a new one for the two 8 inch woofers. I dont need the woofers to really go low (Rythmik 15 inch sub is present), I just need to the system to have more mid bass slam.


Any thoughts ? Woofer suggestions ? crossover point at ?

Scrap the idea ?
__________________
na

Last edited by qguy; 1st September 2011 at 04:31 AM.
  Reply With Quote
Old 1st September 2011, 04:53 AM   #2
picowallspeaker is offline picowallspeaker  Italy
diyAudio Member
 
picowallspeaker's Avatar
 
Join Date: Apr 2007
Hi Q-Guy ,
What you need in a wwMt is ...a Midrange : That thing !
If the Ushers that you have in the cabinet are sufficiently robust , I don't see the issues , other than the 'classic' ones that are related with driver diameter/dispersion at various frequencies . So , for a 'classic' bookshelf ,the project is intended to be fairly good ,the perfect compromise for budget and space . Problems that may occur when putting the crossover points in the 'telephone band' are serious and need knowledge and application .
The best thing to do is to measure each component and get an idea of what's its ideal band ( ideous ! ) .
Theoretically , I would keep the Usher woofer and cross it at about 500 Hz ,even 800 Hz , then put a MONSTER PLANAR like a B&G neo 8 or...10 !!
and if the Usher tw is good enough ,keep it for the upper end ....
  Reply With Quote
Old 1st September 2011, 05:03 AM   #3
qguy is offline qguy  Canada
diyAudio Member
 
Join Date: Mar 2005
Location: Burnaby
Send a message via AIM to qguy Send a message via MSN to qguy Send a message via Yahoo to qguy
good idea, I might not be able to use the NEOs as the current enclosure will not fit, but your idea to make the 8945 as a woofer sounds good, basically Add new Midrange (7 inch ) that fits the current enclosure and use the 8945 as woofers
__________________
na
  Reply With Quote
Old 1st September 2011, 05:32 AM   #4
picowallspeaker is offline picowallspeaker  Italy
diyAudio Member
 
picowallspeaker's Avatar
 
Join Date: Apr 2007
Why a 7" midrange ? I'm recently finishing a two way with a 5" wf and a 1" dome tw ,the intention is to have a sweet integration at crossover frequency ( 2.5 K Hz ) without too much time spent in making a crossover being able to optimize dispersion behavior .
A TB W4 655 SA is said to be an excellent performer as a midrange .And , about enclosure making ...why not ?!
  Reply With Quote
Old 1st September 2011, 06:07 AM   #5
qguy is offline qguy  Canada
diyAudio Member
 
Join Date: Mar 2005
Location: Burnaby
Send a message via AIM to qguy Send a message via MSN to qguy Send a message via Yahoo to qguy
The current enclosures are really nice, would want to make the process as "simple" as I can manage

1. Add two 8 inch woofers or one Ten inch woofer with box and crossover to serve as stands
2 Modify existing crossover to relieve bass from current 2 ways
3. Enjoy the music .... i hope...
__________________
na

Last edited by qguy; 1st September 2011 at 06:14 AM.
  Reply With Quote
Old 1st September 2011, 06:36 AM   #6
picowallspeaker is offline picowallspeaker  Italy
diyAudio Member
 
picowallspeaker's Avatar
 
Join Date: Apr 2007
Ok ,now I understand : you want to shift to an order of bigger magnitude ,so the wf would become a mid-wf .
As I told you , bookshelves ,or at least most of 2 way systems ,are quite 'easy' to do ,although many don't like the transition from mid-wf to Tw in the telephone band . they are easy in a budget oriented market : coils for a 2 KHz crossovers are in the 1-2 mH range ( for 8 Ohm drivers !!) ,and prices rise up when crossing low ,in the range of 5 -10 mH . Also caps for highpass can be
monstruosly not cheap ,that's why many are going active ,and I suggest to go active for 'relieving the woofer from bass '.
And...crossover is the heart of a loudspeaker : fail it , and it won't sound any good .
  Reply to this post

Reply


From TW to TMWW ?Hide this!Advertise here!
Thread Tools

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
SUPRAVOX TG1 or TW 2-20? otto88 Multi-Way 0 16th March 2010 01:24 PM
FS: Dayton TMWW Crossovers Slanski62 Swap Meet 1 16th August 2008 01:31 AM
TMWW crossover questions elshout Multi-Way 3 10th March 2008 09:51 PM
Raven 3.1 ribbon TW Sundance Planars & Exotics 0 9th February 2006 01:59 PM
tw comparison ermes Multi-Way 0 29th March 2004 12:32 PM


New To Site? Need Help?

All times are GMT. The time now is 02:02 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©1999-2021 diyAudio
Wiki