Using 2 sets of Stereo Speakers for Stereo Sound? - AVS Forum
Forum Jump: 
 
Thread Tools
post #1 of 16 Old 06-06-2007, 06:57 AM - Thread Starter
Advanced Member
 
snickersbar's Avatar
 
Join Date: Jul 2004
Posts: 802
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Liked: 10
This might sound stupid but is there any advantage or usefulness to installing 2 sets of speakers in the same room for stereo sound? I think this is how car audio works right?

Is there any reason to do this in a house?
snickersbar is offline  
Sponsored Links
Advertisement
 
post #2 of 16 Old 06-06-2007, 08:12 AM
Member
 
biosci1's Avatar
 
Join Date: Feb 2006
Location: Chicagoland Area
Posts: 72
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I have no idea but were you thinking of something like bookshelves and floorstanding speakers? for a total of 4 perhaps?
biosci1 is offline  
post #3 of 16 Old 06-06-2007, 08:16 AM
AVS Addicted Member
 
Chu Gai's Avatar
 
Join Date: Sep 2002
Location: NYC area
Posts: 14,789
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 172 Post(s)
Liked: 469
Bad idea.

"I've found that when you want to know the truth about someone that someone is probably the last person you should ask." - Gregory House
Chu Gai is online now  
post #4 of 16 Old 06-06-2007, 09:06 AM
Senior Member
 
sprung2's Avatar
 
Join Date: Jul 2003
Posts: 203
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Quote:
Originally Posted by Chu Gai View Post

Bad idea.

Why?
sprung2 is offline  
post #5 of 16 Old 06-06-2007, 10:39 AM
AVS Special Member
 
Lindahl's Avatar
 
Join Date: Dec 2005
Posts: 1,745
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked: 18
If you play both pairs at the same time, you'll get destructive interference. Think of soundwaves like waves in water... when two waves meet, they'll create one larger wave (larger peaks and dips). This generally isn't a big deal in audio, until you have two waves that are identical, in other words: two speakers generating the same signal. Very low fidelity to the source.
Lindahl is offline  
post #6 of 16 Old 06-06-2007, 12:53 PM
Senior Member
 
sprung2's Avatar
 
Join Date: Jul 2003
Posts: 203
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Quote:
Originally Posted by Lindahl View Post

If you play both pairs at the same time, you'll get destructive interference. Think of soundwaves like waves in water... when two waves meet, they'll create one larger wave (larger peaks and dips). This generally isn't a big deal in audio, until you have two waves that are identical, in other words: two speakers generating the same signal. Very low fidelity to the source.

What you're describing is not destructive but constructive interference. Which is usually desirable. Modern receiver implementations of multi-channel stereo have no phase cancellation issues with monopole rears.
sprung2 is offline  
post #7 of 16 Old 06-06-2007, 01:20 PM
AVS Special Member
 
scorch123's Avatar
 
Join Date: Jun 2004
Location: Chandler, AZ
Posts: 1,824
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Make a Hafler circuit for your 4 speakers instead for a quasi-surround.

- Steve O.
scorch123 is offline  
post #8 of 16 Old 06-06-2007, 01:34 PM
AVS Addicted Member
 
sivadselim's Avatar
 
Join Date: Oct 2004
Location: CO
Posts: 16,085
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 54 Post(s)
Liked: 68
Quote:
Originally Posted by snickersbar View Post

Is there any reason to do this in a house?

Do you mean in the same room or in separate locations?

Why do you want to do this? What are you trying to accomplish, exactly?

I'm with Chu Gai. Bad idea.

"All men are frauds. The only difference between them is that some admit it. I myself deny it."
sivadselim is offline  
post #9 of 16 Old 06-06-2007, 01:34 PM
AVS Special Member
 
Lindahl's Avatar
 
Join Date: Dec 2005
Posts: 1,745
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked: 18
Quote:
Originally Posted by sprung2 View Post

What you're describing is not destructive but constructive interference. Which is usually desirable. Modern receiver implementations of multi-channel stereo have no phase cancellation issues with monopole rears.

We were both wrong. It's actually destructive and constructive (dips/peaks). He said he was using them for stereo sound, not multi-channel stereo sound, so yes, there will be phase issues. Regardless, playing a stereo source in multi-channel stereo destroys the fidelity (albeit less so than having phase issues).
Lindahl is offline  
post #10 of 16 Old 06-06-2007, 01:35 PM
AVS Addicted Member
 
sivadselim's Avatar
 
Join Date: Oct 2004
Location: CO
Posts: 16,085
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 54 Post(s)
Liked: 68
Quote:
Originally Posted by sprung2 View Post

Modern receiver implementations of multi-channel stereo have no phase cancellation issues with monopole rears.

And many of us despise this setting for the reproduction of what are originally 2-channel sources.

"All men are frauds. The only difference between them is that some admit it. I myself deny it."
sivadselim is offline  
post #11 of 16 Old 06-06-2007, 03:04 PM
AVS Addicted Member
 
Chu Gai's Avatar
 
Join Date: Sep 2002
Location: NYC area
Posts: 14,789
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 172 Post(s)
Liked: 469
Unless you're planning to turn your room into a disco with extacy and an open bar, this is just so cheesy. People getting into 2 channel or even 2.1 stereo, or 3.1 get finicky about a lot of things...speaker placement for good imaging and soundstage, dealing with first order reflections...doing what they can to make the stereo experience just that...a good experience. If you've got an extra set of speakers, just use them in another room. If the ones you've got are insufficiently sized for your room, then get ones that are properly sized. Just 'cause you've got them doesn't mean you ought to use them.

"I've found that when you want to know the truth about someone that someone is probably the last person you should ask." - Gregory House
Chu Gai is online now  
post #12 of 16 Old 06-06-2007, 04:20 PM
Senior Member
 
sprung2's Avatar
 
Join Date: Jul 2003
Posts: 203
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Quote:
Originally Posted by Lindahl View Post

We were both wrong. It's actually destructive and constructive (dips/peaks). He said he was using them for stereo sound, not multi-channel stereo sound, so yes, there will be phase issues. Regardless, playing a stereo source in multi-channel stereo destroys the fidelity (albeit less so than having phase issues).

Misery likes company, I stated nothing incorrectly. The distortion you speak of is a result of reflections which can be mitigated somewhat with room treatments and peq. Monopoles correctly laid out and fed by a stereo signal correctly processed in a listening room well treated interfere constructively for the most part.
sprung2 is offline  
post #13 of 16 Old 06-07-2007, 12:20 AM
AVS Special Member
 
Lindahl's Avatar
 
Join Date: Dec 2005
Posts: 1,745
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked: 18
Quote:
Originally Posted by sprung2 View Post

The distortion you speak of is a result of reflections which can be mitigated somewhat with room treatments and peq.

I spoke of no distortion for multi-channel stereo, just loss of fidelity. You're putting sound behind you where it isn't supposed to be. The sound was mixed for 2-channel stereo. I don't want performers hanging out behind me, nor inside my head. I want the performance in front of me, like it's supposed to be.

Quote:
Originally Posted by sprung2 View Post

Monopoles correctly laid out and fed by a stereo signal correctly processed in a listening room well treated interfere constructively for the most part.

He said nothing of processing the stereo signal.
Lindahl is offline  
post #14 of 16 Old 06-13-2007, 09:57 PM
Member
 
RabPaul's Avatar
 
Join Date: Apr 2007
Posts: 38
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I know someone who did just that with one bookshelf speaker on top of the other. It sounds OK, but there are issues with imaging as well as some dips and peaks with music. He has not given me any reason for doing this except some mention that he read about it somewhere. I believe his other half must have told him to use them or lose them.
RabPaul is offline  
post #15 of 16 Old 06-13-2007, 11:06 PM
AVS Addicted Member
 
Chu Gai's Avatar
 
Join Date: Sep 2002
Location: NYC area
Posts: 14,789
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 172 Post(s)
Liked: 469
She was talking about something else I think.

"I've found that when you want to know the truth about someone that someone is probably the last person you should ask." - Gregory House
Chu Gai is online now  
post #16 of 16 Old 06-20-2007, 08:38 AM
Member
 
racerxnet's Avatar
 
Join Date: Apr 2006
Posts: 128
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Bad idea, as the load to the amplifier will increase. Not to mention speaker placement is critical. Better speakers will answer your needs.


MAK
racerxnet is offline  
Reply 2 Channel Audio

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