***SEOS 12 / DNA-360 / Eminence Delta 12LFA Curved Build*** - Page 8 - AVS Forum
Forum Jump: 
Reply
 
Thread Tools
post #211 of 218 Old 08-19-2013, 07:58 AM
AVS Special Member
 
cuzed2's Avatar
 
Join Date: Nov 2006
Location: Chicago Area
Posts: 4,403
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Liked: 63
Quote:
Originally Posted by cuzed2 View Post

Thanks Tux!
I will try swapping the tweeter polarity this week and will report back.
As for for near-field measurements; most of today's sweeps were taken in-room with the MIC 36" from the baffle face. Does near-field mean I should move the MIC even closer?

OK Gang - did some more testing this weekend. The polarity swap for the tweeter (360 CD) was indeed necessary, see below.

The graph below is after I swapped the polarity on the RF (GOLD), as compared to the LF (Blue) that had not yet been changed:


The following is an even better comparison of the LF before (BLUE), and after (RED) swapping the polarity


And then some more investigation of the LF roll-off for the mains, and why Audyssey is crossing my mains over at 150Hz.
As per Tux's recommendation; I did a close MIC measurement of the deltalight II woofer, here is the result, 1" from the dustcap for both the LF and RF.


So with the my front SEOS mains behaving well; I have to assume that my roll-off is related to my room, mains placement, and/or room treatment related...?
Probably time to take this to the "acoustical treatment thread" or the "simplified Audyssey thread"
LTD02 likes this.

Cuzed2
Check out a video of my theater here
CuznEddy Cinema
Officially Hanesamatized on 8/1/09

cuzed2 is offline  
Sponsored Links
Advertisement
 
post #212 of 218 Old 10-05-2013, 01:25 PM
Senior Member
 
Java's Avatar
 
Join Date: Mar 2002
Posts: 493
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 18
Quote:
Originally Posted by cuzed2 View Post

OK Gang - did some more testing this weekend. The polarity swap for the tweeter (360 CD) was indeed necessary, see below.

The graph below is after I swapped the polarity on the RF (GOLD), as compared to the LF (Blue) that had not yet been changed:


The following is an even better comparison of the LF before (BLUE), and after (RED) swapping the polarity


And then some more investigation of the LF roll-off for the mains, and why Audyssey is crossing my mains over at 150Hz.
As per Tux's recommendation; I did a close MIC measurement of the deltalight II woofer, here is the result, 1" from the dustcap for both the LF and RF.


So with the my front SEOS mains behaving well; I have to assume that my roll-off is related to my room, mains placement, and/or room treatment related...?
Probably time to take this to the "acoustical treatment thread" or the "simplified Audyssey thread"

Hey, Cuzed

I hate to hijack Nick's thread, but his polarity issue continues to keep my curiosity. Your mains are 2512s using this crossover design, right?

Any updated impression on the polarity swap?

It's a bit of pain for me to open my boxes back up, so I wanted to check with you.

Thanks,

Java
Java is offline  
post #213 of 218 Old 10-05-2013, 01:32 PM
AVS Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 15,821
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 80 Post(s)
Liked: 807
"As per Tux's recommendation; I did a close MIC measurement of the deltalight II woofer, here is the result, 1" from the dustcap for both the LF and RF."

p-f-s!

Listen. It's All Good.
LTD02 is offline  
post #214 of 218 Old 10-06-2013, 09:59 AM
Senior Member
 
Java's Avatar
 
Join Date: Mar 2002
Posts: 493
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 18
Quote:
Originally Posted by LTD02 View Post

"As per Tux's recommendation; I did a close MIC measurement of the deltalight II woofer, here is the result, 1" from the dustcap for both the LF and RF."

p-f-s!

Huh? smile.gif
Java is offline  
post #215 of 218 Old 10-06-2013, 10:27 AM
AVS Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 15,821
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 80 Post(s)
Liked: 807
Acronym: Pretty F_cking Sweet

1. Used as a way to describe something that is just way to cool for school.

2. Also used when saying 'Sweet' just doesn't cut it.

Example 1:
"I checked out that DJ from SA that you told me about. PFS!"

Example 2:
"I got digets from two girls at that show, now thats PFS."

:-)

Listen. It's All Good.
LTD02 is offline  
post #216 of 218 Old 10-06-2013, 10:36 AM
AVS Special Member
 
cuzed2's Avatar
 
Join Date: Nov 2006
Location: Chicago Area
Posts: 4,403
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Liked: 63
Quote:
Originally Posted by Java View Post

Hey, Cuzed

I hate to hijack Nick's thread, but his polarity issue continues to keep my curiosity. Your mains are 2512s using this crossover design, right?

Any updated impression on the polarity swap?

It's a bit of pain for me to open my boxes back up, so I wanted to check with you.

Thanks,

Java

Java,
I just checked; and yes that is the same XO design. However; the polarity to the CD has now been reversed from what is shown on that schematic. As for listening impressions; the vocals in stereo mode seem to be more "forward" (don't think it is placebo effect).

Cuzed2
Check out a video of my theater here
CuznEddy Cinema
Officially Hanesamatized on 8/1/09

cuzed2 is offline  
post #217 of 218 Old 10-06-2013, 10:38 AM
Senior Member
 
Java's Avatar
 
Join Date: Mar 2002
Posts: 493
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 18
Quote:
Originally Posted by LTD02 View Post

Acronym: Pretty F_cking Sweet

1. Used as a way to describe something that is just way to cool for school.

2. Also used when saying 'Sweet' just doesn't cut it.

Example 1:
"I checked out that DJ from SA that you told me about. PFS!"

Example 2:
"I got digets from two girls at that show, now thats PFS."

:-)

Ah. You are always expanding my horizons, LTD. wink.gif
Java is offline  
post #218 of 218 Old 10-26-2013, 07:29 AM
Senior Member
 
Java's Avatar
 
Join Date: Mar 2002
Posts: 493
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 18
Hey Cuzed,

Missed your reply. Thanks.

I'll give it a try. I always cringe when I have to open up the boxes...

Looking at your and Nick's response curves pre/post, it looks like this is a needed tweak.

Thanks, again

java
Java is offline  
Reply DIY Speakers and Subs

User Tag List

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