Get Free, Friendly, Expert Advice
Call 1-866-244-8796 or email

Designed and Manufactured in Canada Since 1980


AxiomAudio Blog

Blind Listening Tests

Sneak Peek into Axiom’s Current Research and Development

Axiom’s Newest Speaker: The In-Ceiling M3

Wall'O'Fame
Greg's pseudo-HT room
EP175v4 with M3v4
Who's Online
1 registered (MarkSJohnson), 47 Guests and 5 Spiders online.
Key: Admin, Global Mod, Mod
Financing
Forum Stats
13336 Members
11 Forums
22947 Topics
405867 Posts

Max Online: 378 @ 02/24/13 04:33 PM
Top Posters
Ken.C 17809
pmbuko 16298
SirQuack 13344
CV 11273
MarkSJohnson 10968
Meanwhile On Facebook

The end of a truly unique voice. RIP Joe Cocker - you were part of the soundtr...

Here's hoping you get what you really want this year! What could be better than...

Shopping made easy! Need it by the 24th? Upgrade to air shipping for just $20!...

Just two more days! Better tell your gift-givers! http://axiomaudio.com/holida...

Page 2 of 2 < 1 2
Topic Options
Rate This Topic
#261301 - 05/25/09 02:13 PM Re: Dolby Prologic IIx Music Mode & Subwoofer [Re: Ken.C]
grunt Offline
connoisseur

Registered: 12/04/06
Posts: 3569
Loc: Nirvana
 Originally Posted By: alan

More research is needed. I still have a contact at Dolby Labs, and at H/K, so I'll send off an email and see what comes back. I think I read about this in a thread on another forum.

There will be an update. . .


Thanks for taking an interest in this, I’m very curious as to what’s happening so I hope you come up with something.

 Originally Posted By: EFalardeau

That could be an indication (if the difference is THAT big), that your sub-woofer might be configured too "hot" to match your mains only.


I was thinking the same thing which is why when I ran my test I reset all crossovers to 80Hz (had my mains set to 60Hz) in both 2ch direct + subwoofer and multi-channel. I also reset all the speakers to the base calibration so nothing was running hot.

To reiterate when I switch between 2ch direct + sub and DPLllx music the overall SPL at the listening position stays the same but the subwoofer‘s output goes up 8-10dB in DPLllx music, in DPLllx cinema there is an overall increase of about 2dB at the listening position. There’s a corresponding drop from the main’s woofers.

 Originally Posted By: kcarlile

I knew there was a reason I exclusively use Neo6.


I Just tested Neo6 and it’s doing the same thing only it’s upping the subwoofer by 10-12 dB vs Dolby’s 8-10 but just like Dolby the overall SPL is staying the same.
_________________________
3M80 2M22 6QS8 2M2 1EP500 Sony BDP-S590 Panny-7000 Onkyo-3007 Carada-134 Xbox Buttkicker AS-EQ1

Top
#261303 - 05/25/09 02:36 PM Re: Dolby Prologic IIx Music Mode & Subwoofer [Re: grunt]
Ken.C Offline
shareholder in the making

Registered: 05/03/03
Posts: 17809
Loc: NoVA
D'oh.

Now what I always do when I'm calibrating DD or DTS (non-Neo6 or PLII) is calibrate the sub 10 dB hotter than the mains. However, that could be an artifact of my calibration disc: the original non-Avia one, whatever that is.

I assume my settings from the DD and DTS carry over to PLII and Neo6, respectively. I could be horribly wrong, of course.


Edited by kcarlile (05/25/09 02:38 PM)
_________________________
I am the Doctor, and THIS... is my SPOON!

Top
#261319 - 05/25/09 10:20 PM Re: Dolby Prologic IIx Music Mode & Subwoofer [Re: Ken.C]
JohnK Offline
shareholder in the making

Registered: 05/11/02
Posts: 10412
Okay, I punched up the Rachmaninoff 1st Symphony, which has a quite bass-heavy passage about 25 seconds in. I switched between the DPLII Music and Movie modes several times each at the point and measured no significant difference(12" from EP500)with my SPL meter. The Movie mode averaged about a dB higher, but that could simply be measurement error.

Edit: I took more time and ran the same several times each with straight stereo, Neo:6 and Neural Surround(don't have Logic 7 available). All measurements were essentially identical within a dB.


Edited by JohnK (05/25/09 10:43 PM)
_________________________
-----------------------------------

Enjoy the music, not the equipment.



Top
Page 2 of 2 < 1 2



Moderator:  alan, Amie, Andrew, axiomadmin, Brent, Debbie, Ian, Jc 

Home  |  Corporate Info  |  Products  |  Message Board  |  FAQs  |  Warranty  |  Site Map  |  Privacy Statement   |  Contact Us

©2014 Colquhoun Audio Laboratories Limited
All Rights Reserved.