Room Measurments with REW Noob - Page 2 - Home Theater Forum and Systems - HomeTheaterShack.com

Reply
 
Thread Tools
post #11 of 43 Old 11-15-17, 10:20 PM Thread Starter
Senior Shackster
 
The_Nephilim's Avatar
Gerald
 
Join Date: Mar 2010
Location: 3rd Stone from the Sun
Posts: 253
Re: Room Measurments with REW Noob

Well I tested just the sub from 10-200Hz. I ran REW with the Umik Pointed at the Subwoofer about 6" and the correct calibration file loaded and got the following reading, this was with no filters or EQ in the iNuke:


Room Measurments with REW Noob-subonly.jpg


I did set the HPF filter on the iNuke but I read a guide on How to set it below 20Hz it should be set to 16Hz?? the above graph does look like the Sub is working as it should?
The_Nephilim is offline  
Sponsored Links
Advertisement
 
post #12 of 43 Old 11-16-17, 06:03 PM Thread Starter
Senior Shackster
 
The_Nephilim's Avatar
Gerald
 
Join Date: Mar 2010
Location: 3rd Stone from the Sun
Posts: 253
Re: Room Measurments with REW Noob

OK I ran some more tests to day. this is the lates w/Front L/R + Sub graph.. I did the test from 2 - 20KHz but modeled the JPG for the sub Only..

AS you will see I still get a null from around 20-26hz?? I am unsure what is going on there as the separate sub test showed the sub is working at least I think it is Working Properly just that void there when doing the full test..

Does the above graph the post above this one show that the subwoofer is tuned at 17Hz ??


Room Measurments with REW Noob-new-sub.jpg
The_Nephilim is offline  
post #13 of 43 Old 11-16-17, 09:29 PM Thread Starter
Senior Shackster
 
The_Nephilim's Avatar
Gerald
 
Join Date: Mar 2010
Location: 3rd Stone from the Sun
Posts: 253
Re: Room Measurments with REW Noob

OK I was making some mistakes with setting up REW.. I do believe I corrected them and have some new mdats.. I took 2 measurements and made notes in the files I saved..

One measurement was at listening position and SUB ONLY.. the 2nd was taken at 3feet from speaker center cone with the mic..

I made a mistake with the Mic setting I was setting the mic gain too 81 and it needed to be at like 10 or under.. I thought the laptop had Win 10 but it has Win 7 so I goofed there probally why they read so high..

I corrected that and here is a SPL Graph with the new measurements. they look similar but not as high DB wise..

Room Measurments with REW Noob-both-measurments.jpg



here are the 2 mdat files incase anyone wants a more detailed look:
https://1drv.ms/u/s!AgDOJnMP-19IqSO0RBRxsnLpx4Yd


EDIT: I was rereading the faq and guide I was able to get Asio working last night. In the Guide it states to test the Speaker front L w/Sub?? Is that still how I should do it for a Full range reading??

Last edited by The_Nephilim; 11-17-17 at 01:21 PM.
The_Nephilim is offline  
 
post #14 of 43 Old 11-17-17, 06:40 PM Thread Starter
Senior Shackster
 
The_Nephilim's Avatar
Gerald
 
Join Date: Mar 2010
Location: 3rd Stone from the Sun
Posts: 253
Re: Room Measurments with REW Noob

I had made some adjustments in the PEQ and came to a better graph.. here it is:



Room Measurments with REW Noob-subflat.jpg


Now I read some of the guides especially this one:

http://www.hometheatershack.com/foru...urve-long.html


I followed along and did as he described there to use a 1.6 smoothing and EQ it. From what I can tell I have an improvement from where I started.. I think the Subwoofer is about as good as I can get it from all I see and read..

Now should I bother measuring the other speakers in my system or would that be pointless as I plan on building some DIY Speakers??

Now a Couple of the measurements I had some configuration issues but currently I have Asio4all working on the laptop. I can now test all 8 channels.. I have a 7.1 system..

The One thing I don't get yet in the setup guide it states I should be able to set the AVR to 7.1 channel input which when I do I hear no sound.. I have to set it to TV on the AVR.

I am curious to know why I can not use the 7.1 channel input like when I run my SACD/DDVD-Audio Player Denon 1930ci?? Is this mode not the same they talk about in the setup guide that I set on my AVR Marantz 4001..
The_Nephilim is offline  
post #15 of 43 Old 11-19-17, 07:13 PM Thread Starter
Senior Shackster
 
The_Nephilim's Avatar
Gerald
 
Join Date: Mar 2010
Location: 3rd Stone from the Sun
Posts: 253
Re: Room Measurments with REW Noob

OK Moving on I made some more measurements just a minute ago and mostly it was for measuring for the distance setting which I was able to do.. I was able to see what the distance was and set the Reference Speaker that was closest to the mik..

But I imagine these are good for regular measuring. The measurements are made at Main Listening Position and at 75DB SPL Reading..

I double checked the levels and set them as I think I finally figured out how to set it up correctly..

From what I was able to discover setting the levels the AVR is supposed to set the Main Volume Automatically but with my receiver I have to adjust the Main Volume to get it set..

So the Problem I am having is trying to figure out what to set the Main Volume Level at.. I seen some say to set the MVL at ZERO but that seems way too loud..

Soon I am getting a new AVR With Audyssey and that should not matter anymore as the newer AVR Play the Pink Noise at a Set level..

Here is the mdat in case anybody wants a peak.. Remember these are the speakers I will be replacing.. Right now I tuned up the sub a bit and it goes down to 16hz preet loud now..

Now sure what else to do with REW and this post seems a bit slow so hopefully I can get the new AVR in January and get the new speakers started in Feb... Still trying to decide what DIY Speakers to get.. I am thinking maybe those bookshelves I saw a DIY Group..


https://1drv.ms/u/s!AgDOJnMP-19IqSb1VyjwaeQfb8gh
The_Nephilim is offline  
post #16 of 43 Old 11-28-17, 12:25 AM Thread Starter
Senior Shackster
 
The_Nephilim's Avatar
Gerald
 
Join Date: Mar 2010
Location: 3rd Stone from the Sun
Posts: 253
Re: Room Measurments with REW Noob

Hi All,

I was wondering if anybody still visits here in the REW section of the Forums.. Been kinda quiet here last week or so..

OR is it because of the Holiday..?
The_Nephilim is offline  
post #17 of 43 Old 11-29-17, 10:54 PM
HTS Senior Moderator
 
Wayne A. Pflughaupt's Avatar
 
Join Date: Apr 2006
Location: Corpus Christi, Texas
Posts: 9,166
Send a message via Yahoo to Wayne A. Pflughaupt
Re: Room Measurments with REW Noob

Sorry Gerald, but for some reason I don't think I was getting an e-mail notification for your thread.

In any event, your last graph looks pretty good.

Regards,
Wayne



To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
|
To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

Wayne A. Pflughaupt is offline  
post #18 of 43 Old 11-29-17, 11:41 PM Thread Starter
Senior Shackster
 
The_Nephilim's Avatar
Gerald
 
Join Date: Mar 2010
Location: 3rd Stone from the Sun
Posts: 253
Re: Room Measurments with REW Noob

So do you think I will need any room treatments?? did you see the sub measurements I took?

In the MLP there was a dip but when I measured from about 1foot away from the subwoofer it looked fine, Do you think there is some sort of cancelation thing going on with my sub..

I did try and move the sub I even turned it 180 facing the rear wall about 1 foot.. IT still looked the same with the dip..
The_Nephilim is offline  
post #19 of 43 Old 11-30-17, 02:00 PM
HTS Senior Moderator
 
Wayne A. Pflughaupt's Avatar
 
Join Date: Apr 2006
Location: Corpus Christi, Texas
Posts: 9,166
Send a message via Yahoo to Wayne A. Pflughaupt
Re: Room Measurments with REW Noob

If youíre talking about the dip seen in Post #13, itís caused by the subís interaction with the room. A different location might take care of it. Typically best response is achieved with the sub in a corner with uninterrupted walls in both directions (i.e. no open doorways). Typically there will be a peak in response, but that is easily dealt with via parametric EQ.

Just noticed your pictures from the first page of the thread. Iím shocked that such an impressive sub is dead in the water below 30 Hz. What happened to the 17 Hz tuning?

Regards,
Wayne



To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
|
To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

Wayne A. Pflughaupt is offline  
post #20 of 43 Old 11-30-17, 07:08 PM Thread Starter
Senior Shackster
 
The_Nephilim's Avatar
Gerald
 
Join Date: Mar 2010
Location: 3rd Stone from the Sun
Posts: 253
Re: Room Measurments with REW Noob

Quote:
Wayne A. Pflughaupt wrote: View Post
If youíre talking about the dip seen in Post #13, itís caused by the subís interaction with the room. A different location might take care of it. Typically best response is achieved with the sub in a corner with uninterrupted walls in both directions (i.e. no open doorways). Typically there will be a peak in response, but that is easily dealt with via parametric EQ.

Just noticed your pictures from the first page of the thread. Iím shocked that such an impressive sub is dead in the water below 30 Hz. What happened to the 17 Hz tuning?

Regards,
Wayne
Well that is exactly what I been trying to determine with the sub.. Either the sub is broke or it is not the sub I thought it was..

I really do not know what to do.. The sub is supposed to be a Mach 5 IXL 18.4 with a 17hz tune.. I do not believe there is any markings on the sub itself so either the sub is broke or it is a fake..
The_Nephilim is offline  
Reply

Bookmarks

Tags
measurments , noob , rew , room

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