Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Room Acoustics & Mods A place to discuss measuring and modifying room Acoustics for better sound

Ambience tweeters using small BMR drivers
Ambience tweeters using small BMR drivers
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 5th April 2019, 04:31 AM   #51
frangus is offline frangus  Australia
diyAudio Member
 
Join Date: Dec 2013
Location: Sydney
Hi Bill

Have you made any changes to these? Are they still 5db down from the main signal? Might give this a try tonight with some spare drivers

I have the old non-HD minidsp 2x4 with a limit of 7.5msec (if I recall correctly) however I can run the ambient drivers several metres behind and above my couch. Hopefully that will do the trick. Will also play with the bandpass limits on both ends of the spectrum

Last edited by frangus; 5th April 2019 at 04:45 AM.
  Reply With Quote
Old 5th April 2019, 09:52 PM   #52
bwaslo is offline bwaslo  United States
Old guy with soldering iron
diyAudio Member
 
bwaslo's Avatar
 
Join Date: May 2006
Location: Portland, Oregon!
Ambience tweeters using small BMR drivers
I've got the delay up to about 25msec now (I think it was). Haven't measured the level in a while, set it by ear most recently. But probably still at about 5dB down I'd guess. When you measure the ambient level, you have to use a long window since the ambient arrivals will be spread out more in time than when you use the usual ~4msec window usually used in-room.
__________________
[W9MJE] Horn spreadsheet SynergyCalc/; SmallSyns SmallSyns;
Crossover design Xsim; Depot diffusor super-easy diffusors
  Reply With Quote
Old 14th April 2019, 12:39 AM   #53
frangus is offline frangus  Australia
diyAudio Member
 
Join Date: Dec 2013
Location: Sydney
Well I didn’t have great success with this and probably due to the 7.5ms limit of the minidsp. I did try the haffler wiriing with a 200-3000hz bandpass filter and that has been the most successful ambience experiment so far. Amazingly effective!

I’ve ordered a minidsp HD and will try again with a 25msec delay

Cheers
  Reply With Quote
Old 14th April 2019, 02:25 AM   #54
bwaslo is offline bwaslo  United States
Old guy with soldering iron
diyAudio Member
 
bwaslo's Avatar
 
Join Date: May 2006
Location: Portland, Oregon!
Ambience tweeters using small BMR drivers
Sorry it didn't work for you frangus. Are you reflecting the NBR driver off the wall and ceiling too?
__________________
[W9MJE] Horn spreadsheet SynergyCalc/; SmallSyns SmallSyns;
Crossover design Xsim; Depot diffusor super-easy diffusors
  Reply With Quote
Old 15th April 2019, 12:11 PM   #55
frangus is offline frangus  Australia
diyAudio Member
 
Join Date: Dec 2013
Location: Sydney
Quote:
Originally Posted by bwaslo View Post
Sorry it didn't work for you frangus. Are you reflecting the NBR driver off the wall and ceiling too?
Bill, my testing was crude, using tiny speakers instead of BMR drivers. This and the fact that my minidsp is limited to 7.5ms is the issue I believe. Iíll do further testing once my new minidsp arrives and get back to you
  Reply With Quote

Reply


Ambience tweeters using small BMR driversHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Small footprint SUB using multiple small drivers FredrikC Subwoofers 5 29th August 2010 05:01 AM
Small footprint SUB using multiple small drivers FredrikC Subwoofers 0 25th August 2010 08:12 PM
Rear mounted ambience drivers, opinions? ptwining Multi-Way 5 20th December 2007 04:41 PM
Ambience tweeters? Audiophilenoob Multi-Way 13 20th June 2005 02:38 AM
best tweeters in small size maxxx Multi-Way 1 7th March 2004 04:53 AM


New To Site? Need Help?

All times are GMT. The time now is 01:11 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki