help with further construction off cinema / music room sloped front and rear wall - Page 6 - Home Theater Forum and Systems - HomeTheaterShack.com

Reply
 
Thread Tools
post #51 of 78 Old 05-14-13, 03:17 PM
HTS Senior Moderator
 
bpape's Avatar
Bryan Pape
 
Join Date: Sep 2006
Location: Wildwood, MO (St. Loui
Posts: 5,288
Send a message via AIM to bpape Send a message via Skype™ to bpape
Re: help with further construction off cinema / music room sloped front and rear wall

Front corners with chunks and the center of the back wall as thick as you can tolerate. Hold off on the other unless you need it.

Bryan

I am serious... and don't call me Shirley.

Bryan Pape
Lead Acoustician/Owner
Sensible Sound Solutions
bpape is offline  
Sponsored Links
Advertisement
 
post #52 of 78 Old 05-14-13, 03:52 PM Thread Starter
Senior Shackster
 
Join Date: Oct 2012
Location: Belgium
Posts: 210
My System
Re: help with further construction off cinema / music room sloped front and rear wall

Ok, backwall is 3.6m wide, 1.4m high, at 1.4 m the sloped ceiling begins ( wich we already treated by removing the ply, after the removed ply is 8" rockwool covered with plastic) so do i tread the entire lower backwall 3.6 x 1.4 or just, lets say 2m x1.4 m and leave the corners untreated?

Front wall is already treated with 24" superchuncks in corners and entire frontwall is made death as per your recommandations.

If i sit in the backwall corners, i do not feel any bass pressure at all.

Last edited by mikesp1; 05-14-13 at 03:58 PM.
mikesp1 is offline  
post #53 of 78 Old 05-14-13, 04:17 PM
HTS Senior Moderator
 
bpape's Avatar
Bryan Pape
 
Join Date: Sep 2006
Location: Wildwood, MO (St. Loui
Posts: 5,288
Send a message via AIM to bpape Send a message via Skype™ to bpape
Re: help with further construction off cinema / music room sloped front and rear wall

Just do the 2m x 1.4m in the middle.

I am serious... and don't call me Shirley.

Bryan Pape
Lead Acoustician/Owner
Sensible Sound Solutions
bpape is offline  
 
post #54 of 78 Old 05-14-13, 05:37 PM
Senior Shackster
Jason
 
Join Date: Jul 2008
Location: Ohio
Posts: 329
I tried a sub directly behind me as well and didn't like it. Everyone says you cannot localize under 80 Hz, but I can tell if a sub is directly behind me. Plotted well, sounded horrible.
Jason_Nolan is offline  
post #55 of 78 Old 05-14-13, 05:44 PM
HTS Senior Moderator
 
bpape's Avatar
Bryan Pape
 
Join Date: Sep 2006
Location: Wildwood, MO (St. Loui
Posts: 5,288
Send a message via AIM to bpape Send a message via Skype™ to bpape
Re: help with further construction off cinema / music room sloped front and rear wall

turn the level down on the one behind you. Every meter closer you'll gain about 6db. You can also dial down the xover point on it to just be high enough to address the dip.

I am serious... and don't call me Shirley.

Bryan Pape
Lead Acoustician/Owner
Sensible Sound Solutions
bpape is offline  
post #56 of 78 Old 05-15-13, 04:51 AM Thread Starter
Senior Shackster
 
Join Date: Oct 2012
Location: Belgium
Posts: 210
My System
Re: help with further construction off cinema / music room sloped front and rear wall

I agree, i can localise that sub behind me, even when i turn the volume much lower.
X over is on 80Hz for both subs, i will make a listen with the sub behind me on x-over 50Hz.

I tried with treadment on the backwall (blue curve), 1.5' of rockwool, 1.2m x 1.4m did maka things wurse!
All energy stays at front half of room, if i cross the midlle of the room there is not much pressure. This was before i made treatment and stays with treadment. it must be the type of room sloped ceilings on back and frontwall.

I do not know what to do anymore...

I think my best beth is to turn the volume on the front sub higher, so the 80hz dip is gone (yellow curve on graph) and then eq the peaks (maybe an antimode can do this?) from 50 to 70Hz and 20 to 40Hz.
Attached Thumbnails
help with further construction off cinema / music room sloped front and rear wall-rt60.jpg  


Last edited by mikesp1; 05-15-13 at 05:12 AM.
mikesp1 is offline  
post #57 of 78 Old 05-16-13, 03:45 AM Thread Starter
Senior Shackster
 
Join Date: Oct 2012
Location: Belgium
Posts: 210
My System
Re: help with further construction off cinema / music room sloped front and rear wall

Todat i did a quick test with rockwool stacked in backcorners, again no benefit.

blue curve: starting point upper ply removed, lower ply untouced
green curve: no rockwool, upper ply removed, lower ply reinforced
red curve: rockwool in corners

As you can see rockwool in corners gives no benefit
Attached Thumbnails
help with further construction off cinema / music room sloped front and rear wall-rt60.jpg  

help with further construction off cinema / music room sloped front and rear wall-1.jpg  


Last edited by mikesp1; 05-16-13 at 03:51 AM.
mikesp1 is offline  
post #58 of 78 Old 05-16-13, 03:54 AM Thread Starter
Senior Shackster
 
Join Date: Oct 2012
Location: Belgium
Posts: 210
My System
Re: help with further construction off cinema / music room sloped front and rear wall

This curve was with lower ply totaly removed, it sounded much better in the low end, altough there are big dips on other frequencies.

Its getting verry frustrating after all the hard work getting no where.
Attached Thumbnails
help with further construction off cinema / music room sloped front and rear wall-1.jpg  

help with further construction off cinema / music room sloped front and rear wall-2.jpg  


Last edited by mikesp1; 05-16-13 at 04:03 AM.
mikesp1 is offline  
post #59 of 78 Old 05-16-13, 07:08 AM Thread Starter
Senior Shackster
 
Join Date: Oct 2012
Location: Belgium
Posts: 210
My System
Re: help with further construction off cinema / music room sloped front and rear wall

Well, today i did some further testing.
I played only with the two Klipsch Palladiums without sub.

It was a relieve, bass was so punchy, articulate.

I then A B'd with and without subwoofer, i can only say Without was so much better!

I think the sub's i am using are no match for the quality of the Palladiums...

Here is a graph of spl 1/24 octaaf with only the fronts:

If i could,bring those peaks at 55 and 100 Hz within 10db that would be a good starting point to move further and start with the blending of the subs...
Attached Thumbnails
help with further construction off cinema / music room sloped front and rear wall-image.jpg  


Last edited by mikesp1; 05-16-13 at 03:07 PM.
mikesp1 is offline  
post #60 of 78 Old 05-16-13, 08:27 AM Thread Starter
Senior Shackster
 
Join Date: Oct 2012
Location: Belgium
Posts: 210
My System
Re: help with further construction off cinema / music room sloped front and rear wall

Waterfall
Attached Thumbnails
help with further construction off cinema / music room sloped front and rear wall-waterfall-mains-only.jpg  


Last edited by mikesp1; 05-20-13 at 04:15 AM.
mikesp1 is offline  
Reply

Bookmarks

Tags
cinema , construction , front , music , rear , room , sloped , wall

Quick Reply
Message:
Options

Register Now




PLEASE COMPLETE ALL REQUIRED FIELDS BELOW... THANKS!

REQUIRED FIELDS ON THIS PAGE
YOU MUST COMPLETE ALL OF THESE

Username
Password
Confirm Password
Email Address
Confirm Email Address
Random Question
Random Question #2




User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
PLEASE READ BELOW PRIOR TO ENTERING AN EMAIL ADDRESS!

ATTENTION!

YOU MUST ACTIVATE YOUR ACCOUNT!

Activation requires you reply to an email we will send you after you register... if you do not reply to this email, you will not be able to view certain areas of the forum or certain images... nor will you be able download software.

AN INVALID EMAIL ADDRESS WILL CAUSE YOUR ACCOUNT TO BE DELETED!

See our banned email list here: Banned Email List

We DO NOT respond to spamcop, boxtrapper and spamblocker emails... please add @hometheatershack DOT com to your whitelist prior to registering or you will get nowhere on your registration.


Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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 is not allowed!
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


For the best viewing experience please update your browser to Google Chrome