Go Back   Home > Forums > Loudspeakers > Subwoofers

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 26th October 2008, 11:35 AM   #1
mikee55 is offline mikee55  United Kingdom
diyAudio Member
 
mikee55's Avatar
 
Join Date: Dec 2005
Location: West Howe
Default Measure my room

Hello all, I have an IB in my ceiling and would like to have a go at doing something with my room acoustics. I'm using floor standers as my mains, which I hope to replace when the CreditCrunch, eases off.

When one gets the urge to do a bit of diyAudio, one has no pennies, one needs to get a fix any way one can.

Because my system, is also Home Theatre( 2 channels only) as in my TV sits between my speakers, is situated in the corner of my lounge, (WAF), my speakers are diagonal on that corner. I have a sofa opposite and one on a side wall, with a open fire opposite that, and various other objects around the room.

With her indoors gone to work, I can play. Is there some measurements ie ratios I can use to posistion my main loudspeakers?

With a tape measure, can one guesstimate problem frequencies? I'd like to get a visual idea on whats happening inside my room. I'd expect to have to factor in windows doors and walls, as well as rug, radiator hi fi stand, PC stand and chair. When my mains used to fire down the side walls with the tv in the middle, my system sounded nice. But because I have a radiator there, which I cant block with a TV, I have to use the corner option. Soundstage is suffering bad, what can I do?

Mike
__________________
If it don't work, I'll fix it in the mix! Or visit http://lsdp.proboards.com/index.cgi
  Reply With Quote
Old 26th October 2008, 12:00 PM   #2
HK26147 is offline HK26147  United States
diyAudio Member
 
Join Date: Jan 2008
Have you already done a preliminary evaluation with something like:
http://www.bobgolds.com/Mode/RoomModes.htm
This could help identify the potential modes and problems freqs
  Reply With Quote
Old 26th October 2008, 12:03 PM   #3
diyAudio Member
 
Join Date: Apr 2003
Location: Portland,Oregon
Blog Entries: 4
Send a message via AIM to DigitalJunkie
I'm no pro,But..

I would think that the first thing to do is to measure the room.
Find out the dimensions,and see what how they translate into wavelengths. Then you can see what the problem frequencies might be,and know what to expect,as far as standing waves go.
(For instance,in this room,there is a peak around 70hz,due to the width of the room.)

Then you can maybe try some room treatments,and other 'simpler' tricks first.


Just a thought.That's probably where I'd start.
  Reply With Quote
Old 26th October 2008, 12:18 PM   #4
mikee55 is offline mikee55  United Kingdom
diyAudio Member
 
mikee55's Avatar
 
Join Date: Dec 2005
Location: West Howe
Default I posted here because.....

....my sub is none movable and everything else must fit in with this. I wish I could take a 3d picture. Basic things like, toe the speakers in, 2 to 3 meters apart, tweaters at ear height. Okay, my IB woofer fires down my bedroom wall and the rear wave exits into the lounge at a right angle because of the manifold.

Its Sunday again, so I don't mind a gentle answer. I don't need an in depth look at how brick density effects some room node... blah blah.

Mike
__________________
If it don't work, I'll fix it in the mix! Or visit http://lsdp.proboards.com/index.cgi
  Reply With Quote
Old 26th October 2008, 01:16 PM   #5
HK26147 is offline HK26147  United States
diyAudio Member
 
Join Date: Jan 2008
Since there isn't a universal definition of soundstage, how can there be a universal solution...
If I had to make recommendations for a room ( blind and mute )...
I divide the primary dimensions ( L,W,D ), and avoid placement at even divisors.
With a overly lively room, or a room of bad proportions, I work to minimize 1st reflection and bring the speakers closer in, to decouple and raise the ratio of direct sound to reflected sound.
  Reply With Quote
Old 26th October 2008, 02:35 PM   #6
mikee55 is offline mikee55  United Kingdom
diyAudio Member
 
mikee55's Avatar
 
Join Date: Dec 2005
Location: West Howe
Default Have a pic

Click the image to open in full size.
__________________
If it don't work, I'll fix it in the mix! Or visit http://lsdp.proboards.com/index.cgi
  Reply With Quote
Old 26th October 2008, 03:23 PM   #7
mikee55 is offline mikee55  United Kingdom
diyAudio Member
 
mikee55's Avatar
 
Join Date: Dec 2005
Location: West Howe
Default look up

Click the image to open in full size.
__________________
If it don't work, I'll fix it in the mix! Or visit http://lsdp.proboards.com/index.cgi
  Reply With Quote
Old 26th October 2008, 03:32 PM   #8
mikee55 is offline mikee55  United Kingdom
diyAudio Member
 
mikee55's Avatar
 
Join Date: Dec 2005
Location: West Howe
Default upstairs

Click the image to open in full size.
__________________
If it don't work, I'll fix it in the mix! Or visit http://lsdp.proboards.com/index.cgi
  Reply With Quote
Old 26th October 2008, 04:06 PM   #9
mikee55 is offline mikee55  United Kingdom
diyAudio Member
 
mikee55's Avatar
 
Join Date: Dec 2005
Location: West Howe
Default room calc

Click the image to open in full size.Click the image to open in full size.Click the image to open in full size.Click the image to open in full size.

Ouch
Sorry Moderators, I Zipped em, but they were too big. even one at a time
__________________
If it don't work, I'll fix it in the mix! Or visit http://lsdp.proboards.com/index.cgi
  Reply With Quote
Old 26th October 2008, 04:23 PM   #10
HK26147 is offline HK26147  United States
diyAudio Member
 
Join Date: Jan 2008
The current position is centered around the TV but offset with the boundaries of the room.
IMO: It would be impossible to get acceptable soundstaging if one of the cabs is in essence corner loaded near 3 boundaries and the other is loaded near 2 boundaries.
If at all possible I would slide the pair over to the right and position with a more equal spacing, and experiment from there.
I would recommend experimenting with hanging heavy drapes, quilts or acoustic panels decorated with a SAF in mind to help tame reflections
  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
Nasty Room Resonances in New Listening Room TubeHead Johnny Multi-Way 4 23rd May 2009 11:13 PM
basic room accoustics..help design my ht room :) JinMTVT Multi-Way 4 4th September 2007 11:35 AM
Speaker Workshop - using "Measure -> Passive Components" to measure ESR ? percy Multi-Way 0 12th March 2006 09:18 PM
MTM - How to measure in room response? Spearmint Multi-Way 9 13th November 2004 08:09 AM


New To Site? Need Help?

All times are GMT. The time now is 03:58 PM.


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