how many VA? - Page 2 - diyAudio
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 18th July 2008, 06:00 AM   #11
amo is offline amo  United States
diyAudio Member
 
Join Date: Apr 2003
Location: Texas - USA
By loosing the eq i suppose you mean to rely on the sealed box attenuation of the low end, which you estimate to be at 80Hz, right? I guess thats what I am doing. The midbass on these is great, and will be even better when I finish lining the enclosures with solid oak on the inside and adding studio foam to really make it dead.

This realy is a fun project, and I am taking the easy route, using B&W 803 as a starting point and using chip amps with readily available PCBs, the only hard part will be replacing the passive XOs with actives from Rod Elliot, and that is not so hard after all. This is a large scale "test" and if it sonds good, I will have no choice but go with all DIY high end design, maybe 12 class-A "heaters" driving some enormous TAD subs and bass, with ATC mid thrown in for good measure Picking a tweeter will be fun too. Now THAT will be fun!!!!!!!!!!

One interesting thing I am finding is that first order slopes, as implemented in the 803 passive, require VERY SERIOUS matching of drivers, and often times, 4th order sounds way better, even when the drivers are wide-ranged. That is one thing I am trying to prove with this design as I take it from 1st and 2nd order to 4th.. Using 4th order and wide range, the XO points can be placed at strategic positions to not impact the phase at critical points. I am understanding that majority of drivers are just not beefy enough to overlay one another and still sound transparent.

Is first order XO over-rated
  Reply With Quote
Old 21st July 2008, 06:41 PM   #12
diyAudio Member
 
roger_lew's Avatar
 
Join Date: Nov 2005
Location: Moscow, ID
The Adire AV8 in a sealed box with Q = .707 rolls off at about 80 Hz. Hard to say exactly where your woofer will roll off. It will depend on the box and the woofer specs. Best to measure.

Look forward to seeing it when it's done.
  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



New To Site? Need Help?

All times are GMT. The time now is 02:21 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