Simplified REW Setup and Use (USB Mic & HDMI Connection) Including Measurement Techniques and How To Interpret Graphs - Page 411 - AVS Forum
Forum Jump: 
 241Likes
Reply
 
Thread Tools
post #12301 of 12311 Old Yesterday, 08:11 PM
AVS Special Member
 
AustinJerry's Avatar
 
Join Date: Jan 2003
Location: Austin, Texas
Posts: 7,832
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 973 Post(s)
Liked: 882
Quote:
Originally Posted by aaranddeeman View Post
All righty..
Yes my AVR has Audyssey MultEQ XT
I will get to the next measurements tonight at some point.
Thank you for being patient with me.
Take your time. You should run the calibration before any more measurements. I assumed you have familiarized yourself with Audyssey best practices by reading the materials in the Audyssey thread. Following guidelines can make a difference between good and poor results.
AustinJerry is offline  
Sponsored Links
Advertisement
 
post #12302 of 12311 Old Yesterday, 09:04 PM
AVS Special Member
 
aaranddeeman's Avatar
 
Join Date: Jan 2005
Location: Lover's State
Posts: 1,405
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 127 Post(s)
Liked: 26
Quote:
Originally Posted by AustinJerry View Post
Take your time. You should run the calibration before any more measurements. I assumed you have familiarized yourself with Audyssey best practices by reading the materials in the Audyssey thread. Following guidelines can make a difference between good and poor results.
Oh. I already took the measurements. But anyways I can repeat both after calibration as well.
But check them out in the mean time.
Attached Thumbnails
Click image for larger version

Name:	left_sub_full_subrepos.jpg
Views:	28
Size:	202.8 KB
ID:	387481   Click image for larger version

Name:	right_sub_full_subrepos.jpg
Views:	25
Size:	197.7 KB
ID:	387489   Click image for larger version

Name:	center_sub_full_subrepos.jpg
Views:	27
Size:	199.9 KB
ID:	387497  
aaranddeeman is online now  
post #12303 of 12311 Old Today, 06:20 AM
AVS Special Member
 
jkasanic's Avatar
 
Join Date: Dec 2006
Posts: 1,252
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 92 Post(s)
Liked: 73
Some pretty steep roll off above 6kHz?? What is the spec of your mains?

Just a tip on using REW, it's almost always better to take a full range measurement and restrict your graph limits when focusing on the bass region. This way when someone asks to see the full range, the measurement is already done. It wasn't clear from your post if that's what you did so disregard if that's the case.
jkasanic is offline  
post #12304 of 12311 Old Today, 10:49 AM
Senior Member
 
TomC1315's Avatar
 
Join Date: Oct 2013
Location: North Royalton, Ohio
Posts: 238
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 39 Post(s)
Liked: 75
3 questions please ...

Do I need a laptop for REW, or can I use my Mac Mini ( I assume I can't use an iPad ) ?

I have the REW program, AudysseyXT, and the 2 PEQs on my PC13Ultra sub ... is there a preferred order involved ?

I have a Radio shack SPL meter ... should I invest in a better devise ?

Thank you :-)

MartinLogan Motion 40s / 30 / LX16s
Marantz SR5007 / UD5007
Emotiva XPA-3
SVS PC13ultra

exercise room: MartinLogan LX16s / Dynamo700
TomC1315 is offline  
post #12305 of 12311 Old Today, 11:42 AM
AVS Special Member
 
AustinJerry's Avatar
 
Join Date: Jan 2003
Location: Austin, Texas
Posts: 7,832
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 973 Post(s)
Liked: 882
This thread is focused more on Windows devices, although several participants do use Mac's. You cannot use an iOS device. A SPL meter will provide crude measurements, but a USB mic is required for serious measurements. The REW guide has microphone recommendations. I don't understand your "preferred order" question.
AustinJerry is offline  
post #12306 of 12311 Old Today, 11:50 AM
AVS Special Member
 
LastButNotLeast's Avatar
 
Join Date: Feb 2007
Location: 08077
Posts: 4,772
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 265 Post(s)
Liked: 280
Quote:
Originally Posted by AustinJerry View Post
I don't understand your "preferred order" question.
Start with all eq off.
Play with your room, speaker placement, etc.
Then use the eq on the subs.
Then run Audyssey.
Repeat.

Downloadable FREE demo discs:
http://www.avsforum.com/t/1475769/de...ently-authored 

Did you really need to quote that entire post in your reply?
LastButNotLeast is offline  
post #12307 of 12311 Old Today, 12:15 PM
Advanced Member
 
3ll3d00d's Avatar
 
Join Date: Sep 2007
Location: London, UK
Posts: 613
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 270 Post(s)
Liked: 85
Quote:
Originally Posted by LastButNotLeast View Post
Start with all eq off.
Play with your room, speaker placement, etc.
Then use the eq on the subs.
Then run Audyssey.
Repeat.
You would use peq after audyssey if you want to apply a house curve. They are not mutually exclusive either, you can do before and after if you like. Typical reason to eq before is to take down a big peak which then enables audyssey to focus filter resources on fine tuning.
3ll3d00d is online now  
post #12308 of 12311 Old Today, 12:52 PM
AVS Special Member
 
aaranddeeman's Avatar
 
Join Date: Jan 2005
Location: Lover's State
Posts: 1,405
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 127 Post(s)
Liked: 26
Thank you Jerry and others for your help.
Now I guess I have fair understanding of how REW works.
I can start playing with it more and more.
Oh and also need to get the USB mic... That should bring in accuracy in the measurements...
aaranddeeman is online now  
post #12309 of 12311 Old Today, 12:56 PM
AVS Special Member
 
aaranddeeman's Avatar
 
Join Date: Jan 2005
Location: Lover's State
Posts: 1,405
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 127 Post(s)
Liked: 26
Quote:
Originally Posted by jkasanic View Post
Some pretty steep roll off above 6kHz?? What is the spec of your mains?

Just a tip on using REW, it's almost always better to take a full range measurement and restrict your graph limits when focusing on the bass region. This way when someone asks to see the full range, the measurement is already done. It wasn't clear from your post if that's what you did so disregard if that's the case.
My mains are JBL Northridge E80
Good TIP on full measurement. I will remember when doing next round.
aaranddeeman is online now  
post #12310 of 12311 Old Today, 01:20 PM
Advanced Member
 
3ll3d00d's Avatar
 
Join Date: Sep 2007
Location: London, UK
Posts: 613
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 270 Post(s)
Liked: 85
Quote:
Originally Posted by aaranddeeman View Post
Good TIP on full measurement. I will remember when doing next round.
you're using an RS SPL meter atm aren't you? if so there is no point measuring beyond ~2kHz, the mic in the meter is not remotely accurate beyond that point. This explains the apparent drastic rolloff in your full range measurements btw, it's just the mic. Generally speaking the RS SPL meter is perfectly fine for general purpose sub work, it increasingly rolls off below 30Hz but the generally available cal files get it into the ballpark. As long as you don't try to use it to shape <30Hz then you'll be ok.

If you want to do full range measurements then a proper mic is the cost of entry.
3ll3d00d is online now  
post #12311 of 12311 Old Today, 01:25 PM
AVS Special Member
 
jkasanic's Avatar
 
Join Date: Dec 2006
Posts: 1,252
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 92 Post(s)
Liked: 73
Quote:
Originally Posted by aaranddeeman View Post
My mains are JBL Northridge E80
Good TIP on full measurement. I will remember when doing next round.
Well, I'm not sure how to explain it then as those speakers are rated +/- 3dB up to 20kHz. Your tweeter crossover is 4kHz and it's a pretty smooth roll off. Looks a bit like destructive interference when you measure the left and right together. Your sure both speakers weren't playing during measurement?
jkasanic is offline  
Reply Audio Theory, Setup, and Chat

Tags
Dayton , Dayton Audio , Room Equilizer Wizard Rew

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


Forum Jump: 

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