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
3 registered (MarkSJohnson, chesseroo, Ken.C), 44 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Financing
Forum Stats
13336 Members
11 Forums
22946 Topics
405860 Posts

Max Online: 378 @ 02/24/13 04:33 PM
Top Posters
Ken.C 17809
pmbuko 16298
SirQuack 13344
CV 11273
MarkSJohnson 10967
Meanwhile On Facebook

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...

So many people took advantage of the weekend sales! Lots of auditioning about t...

Only a few hours left to get a gift card worth up to 25% of your purchase! http:...

Page 1 of 2 1 2 >
Topic Options
Rate This Topic
#392443 - 04/28/13 04:15 PM LFE channel
brwsaw Offline
connoisseur

Registered: 10/12/12
Posts: 1133
Theres one. But many have multiple subs. Why isn't there a designation for the number of subs in use?
2.1, 5.1, 7.1,....
One LFE signal....I get that but...
Why not 2.1(2) or 2.1.2 or 2.2/1 or 2.1+1 or 2.1x2 or...
I like 2.2.
I want 2.4.
We all accept there's only one LFE channel currently.
On that subject why can't other LFE channels be DSP'd? Surround information is pulled from 2 channels...Why not have heavier bass at the point of the explosion? If a gernade is thrown towards the viewer and passes of the left side of the screen why can't a rear left sub be given a few more db to give authority at that location.
IMHO this is where HT/AVR technology should be heading.
_________________________
5 weeks old today

Top
#392444 - 04/28/13 05:26 PM Re: LFE channel [Re: brwsaw]
J. B. Offline
connoisseur

Registered: 01/19/11
Posts: 1274
Loc: Quebec, Canada
frequencies below approx. 80 Hz are not directional, i.e. whether such a signal comes from the back or the front of the sound stage, it will always fill all of the sound stage, and one can't localize the source of those very low frequencies, they're non directional, or are omni directional.

it's like saying one will never be able to say "hey, that very low freq. sound i just heard - or felt - came out the back of the room".


Edited by J. B. (04/28/13 05:29 PM)
_________________________
See:http://www.blu-ray.com/community/gallery.php?member=Gelli
or: Axiom Gallery

Top
#392446 - 04/28/13 07:30 PM Re: LFE channel [Re: brwsaw]
brwsaw Offline
connoisseur

Registered: 10/12/12
Posts: 1133
It is possible to locate a sub when its not set up correctly.
Why would it be impossible to use the signal information to make a single sub in a multi sub set up hit harder at any given moment. It should work but only with multiple signals DSP'd from a combination of the surround and LFE signal.
The surround information would be used to confirm when to adjust the sub output.
_________________________
5 weeks old today

Top
#392451 - 04/28/13 09:26 PM Re: LFE channel [Re: brwsaw]
JohnK Offline
shareholder in the making

Registered: 05/11/02
Posts: 10412
Maybe, but it has to be assumed that correctly set up and calibrated subs will output essentially omni-directional bass frequencies. Attempting to assign a special LFE event to a specific location wouldn't be effective.

The present convention to name setups according to the number of channels(not speakers)should be clear, despite some manufacturers using an advertising term such as "5.2". Two subs aren't 5.2 any more than two center speakers would be 6.1.
_________________________
-----------------------------------

Enjoy the music, not the equipment.



Top
#392454 - 04/28/13 10:10 PM Re: LFE channel [Re: brwsaw]
brwsaw Offline
connoisseur

Registered: 10/12/12
Posts: 1133
I wish there was a way.
_________________________
5 weeks old today

Top
#392461 - 04/28/13 10:55 PM Re: LFE channel [Re: brwsaw]
jakewash Offline
shareholder in the making

Registered: 12/26/03
Posts: 10400
Loc: Calgary, Alberta
Wishing won't help, you will have to come up with a way to change physics.
However, the slightly higher frequencies edging up into the midbass region from an explosion will allow you to identify location and if you really pay close attention or have your sub slightly under calibrated you can locate bass to a speaker as required. The problem is the LFE is usually so strong it overpowers this location and just shakes the room.
_________________________
Jason
-----------------
TTTHHHPPPPPTTTT!

My HT

Top
#392462 - 04/28/13 11:07 PM Re: LFE channel [Re: brwsaw]
brwsaw Offline
connoisseur

Registered: 10/12/12
Posts: 1133
I would assume my only option would be to purchase closer to full range surrounds.
The upgrade to QS8's probably wouldn't do it and I don't have the space an M80 would need.
I know it can be better...
_________________________
5 weeks old today

Top
#392465 - 04/28/13 11:27 PM Re: LFE channel [Re: brwsaw]
jakewash Offline
shareholder in the making

Registered: 12/26/03
Posts: 10400
Loc: Calgary, Alberta
I am quite happy with the way my QS8s work with explosions etc. They are not large so you could try them out and return them if it doesn't improve your surround experiences.
_________________________
Jason
-----------------
TTTHHHPPPPPTTTT!

My HT

Top
#392466 - 04/28/13 11:46 PM Re: LFE channel [Re: brwsaw]
brwsaw Offline
connoisseur

Registered: 10/12/12
Posts: 1133
My next purchase was to be the QS8's.
I am now leaning towards the VP160 for mid May.
_________________________
5 weeks old today

Top
#392469 - 04/29/13 03:14 AM Re: LFE channel [Re: jakewash]
JohnK Offline
shareholder in the making

Registered: 05/11/02
Posts: 10412
To follow up on Jason's comment, some LFE sounds are "aperiodic", i.e., they have no upper harmonics and can't be located through hearing their directional upper harmonics. In contrast, bass musical instruments have such harmonics and that's why we can identify the position of a bass drum, etc., although it may be playing a fundamental note around a clearly non-directional 30-40Hz. The harmonics are played by the speakers, not the sub, and that provides the imaging to locate the instrument.
_________________________
-----------------------------------

Enjoy the music, not the equipment.



Top
Page 1 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.