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

PA Systems A forum for discussion of all parts of a sound reinforcement or DJ system: loudspeakers, mixers (desks) etc.

Amp/speaker matching
Amp/speaker matching
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 7th October 2012, 12:48 PM   #21
chris661 is offline chris661  United Kingdom
diyAudio Member
 
chris661's Avatar
 
Join Date: Feb 2008
Location: Sheffield
Quote:
Originally Posted by tonyh123 View Post
what your saying is that the high frequencies will arrive 'in ear' at very slightly different times because the sound sorces creating them are slightly different...creating a 'guitar phaser effect'?

Hmmmm...

Find a pair of speakers, hook them up to your computer.

Download winISD Pro, and click on to the Signal Generator.

Set it to 8kHz, turn the volume to somewhere acceptable (while its playing through both speakers) and then move your head around a bit.

Notice how the volume changes as you move around.

You'll get something similar because of the two PA speakers near each other - this is a demonstration of interference.



Now go back to your speaker + computer set-up.

Set the computer to mono audio, put the speakers right next to each other, then play some music.

Walk around, and focus on listening to the treble.

You'll probably find it changes a little as you move. This will be the effect on music of having two sources radiating the same sound.

Because music is so complex (made up of lots and lots of different frequencies), the effect of each frequency changing amplitude by a different amount makes the effect of interference fairly small.

To expand: you get different amounts of cancellation at each frequency according to the frequency itself, and your listening position.
As you move, the level of some frequencies will increase, while others decrease.
The net result is a change in sound, but not a massive one - you'll still be able to hear everything clearly (as you did with the two computer speakers next to each other).

HTH

Chris
  Reply With Quote
Old 8th October 2012, 12:55 AM   #22
tonyh123 is offline tonyh123
diyAudio Member
 
Join Date: Sep 2012
Its starting to sound like an interesting effect. would it really be that big a deal- we already struggle with the room sound cos its almost like a cube. If we can afford to keep the speakers then we should try this set-up and see if it just about works? (we have some decent monitors and a smaller amp for mixing down). what do others think?
  Reply With Quote
Old 8th October 2012, 02:15 AM   #23
Top Shelf is offline Top Shelf  Canada
diyAudio Member
 
Top Shelf's Avatar
 
Join Date: Apr 2010
Location: Ontario
Can't hurt to try it out, half and fully drunk people really don't give two sh$*s about phasing and cancellation....mainly about picking up and gettin some
__________________
NO REST FOR THE WOOFER! 🔊😈
  Reply With Quote
Old 8th October 2012, 09:31 AM   #24
tonyh123 is offline tonyh123
diyAudio Member
 
Join Date: Sep 2012
Gee your right-plus the bass player already is already half deaf and has tinnitus-we're on our way there!!
  Reply With Quote
Old 19th October 2012, 11:21 AM   #25
tonyh123 is offline tonyh123
diyAudio Member
 
Join Date: Sep 2012
UPDATE: Went to fit the new driver-opened up the cab and happened to touch the back plate of the mid range horn-it was slightly loose and was causing the low level distortion. I gave it a turn and it was tight again!
  Reply With Quote

Reply


Amp/speaker matchingHide 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
Speaker impedance and amp matching? Skorpio Tubes / Valves 2 10th September 2011 07:22 AM
Matching Speaker and Amp Power milsman2 Multi-Way 31 19th August 2011 08:35 PM
Help with matching speaker impedance to old tube amp idebb Tubes / Valves 8 11th April 2010 05:18 AM
Tube power Amp matching with SAE Mark M pre amp and AR18 speaker or MS 25i soultribe Tubes / Valves 1 13th August 2006 12:08 PM
amp and speaker matching...HELP!!!! dcase69 Multi-Way 1 15th February 2002 12:48 PM


New To Site? Need Help?

All times are GMT. The time now is 04:47 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki