Ohm load of speakers in series? - Page 2 - Home Theater Forum and Systems - HomeTheaterShack.com

 1Likes
Reply
 
Thread Tools
post #11 of 15 Old 05-21-18, 07:21 AM Thread Starter
Senior Shackster
 
Oleson, M.D.'s Avatar
TXFlyGuy
 
Join Date: Feb 2010
Location: Denton, TX, USA
Posts: 153
Re: Ohm load of speakers in series?

Quote:
Wayne A. Pflughaupt wrote: View Post
Well, you have to wonder, if dual speaker pairs was a great idea, everyone would do it and it would be a pretty common thing.

There are a few potential problems.

For one, a series connection pretty much cuts amplifier power in half, which is then divided between the two speakers. So, an amp with 100 watts (per channel) at 8-ohms becomes a 50-watt amp at 16-ohms. That is divided between the two speakers, so they’re each only getting 25 watts. Power calculation is bit trickier in your case – you’d probably end up with 12 ohms per channel with both speakers in series, which would theoretically get you something like 75 watts per channel, again divided between the two speakers.

The other issue is that the sound from respective drivers will be arriving at your ear at different times. IOW, with the speakers side by side, the sound from the “outboard” speaker will reach your ears later than the inside speaker. The result is a phenomenon called comb-filtering. You can probably hear it as a difference in the soundstage, or even a strange timbre-shift as you move your head slightly left or right.

Still, experimenting never hurts. You aren’t going to blow anything up – the worst that can happen is that you don’t like it. But hey, maybe you will!

Regards,
Wayne A. Pflughaupt
Thanks for your input. I do have an amp that is stable into 2 ohm loads, so that is not an issue. My only goal in this "experiment" is to utilize another set of very nice tower speakers (VMPS), that I built from a kit (8 ohm). These would go next to my factory built VMPS towers (4 ohm).

The hope is to increase the soundstage a bit, and perhaps get audio out that may have a bit more overall impact. And...to be able to put the spare towers to good use.

On a side note, these are currently running paired up with a pair of BIC DV-84 towers in another room, creating a 4 ohm load. The DV-84's are much more sensitive, so the volume is a bit more pronounced. But the VMPS has greater bass extension, and this fills out the lower octave nicely.

The comb filter effect is not noticeable, but this is in a smaller sized room.
Oleson, M.D. is offline  
Sponsored Links
Advertisement
 
post #12 of 15 Old 05-21-18, 04:00 PM
Elite Shackster
Kal
 
Join Date: Aug 2006
Location: NYC + CT
Posts: 1,839
Re: Ohm load of speakers in series?

Quote:
Wayne A. Pflughaupt wrote: View Post
It'll work if you wire them in series, but not in parallel.
The problem with wiring different speaker systems in series is probably not a matter of impedance load but that each speaker with its particular complex impedance curve will act as a series filter for the other. The resulting sound quality is completely unpredictable.

Kal Rubinson
__________________________________
"Music in the Round"
Senior Contributing Editor, Stereophile
Kal Rubinson is online now  
post #13 of 15 Old 09-14-18, 01:29 PM
Senior Shackster
 
Join Date: Sep 2012
Location: Ottawa Canada
Posts: 802
My System
Re: Ohm load of speakers in series?

Quote:
Kal Rubinson wrote: View Post
The problem with wiring different speaker systems in series is probably not a matter of impedance load but that each speaker with its particular complex impedance curve will act as a series filter for the other. The resulting sound quality is completely unpredictable.
And the phase angle will be so grossly exagerated. Never wire speaker systems in series for two reasons.

Main/2nd/3rd System
AVR Yamaha RX-V1800/RX-V1900/RX-V1500
Turntable ProJect Xpression III + Ortofon Red
Cassette Deck Yamaha KX-800U/KX-800U/K-720
BluRay Yamaha BD-S681/Sony UBP-X800/Panasonic DMV-BD30
Media Player Iomega +1TB internal drive/WD TV Live Plus + 3TB USB drive
Display Samsung UN65KU6491 65"/UN55MU7000 55"/UN50MU7100
Speakers Main:PSBImage T-45/400/Alphas, Center:PSB Image 8C/200C/AlphaC , Surround:PSB Image 1B/RBH A600
Subwoofer Rythmic LV12-R/PSB Subsonic 6/5
3dbinCanada is offline  
 
post #14 of 15 Old 09-17-18, 03:53 AM
Shackster
 
Join Date: Sep 2018
Posts: 9
Re: Ohm load of speakers in series?

It should come out to b 6. Why wire this way!
xmc1 is offline  
post #15 of 15 Old 09-17-18, 03:56 AM
Shackster
 
Join Date: Sep 2018
Posts: 9
Re: Ohm load of speakers in series?

What r u try n to achieve?...an odd ohm load? If so r u n need of getting the most from ur amp/receiver?
xmc1 is offline  
Reply

Bookmarks

Tags
load , ohm , series , speakers

Quick Reply
Message:
Options

Register Now




PLEASE COMPLETE ALL REQUIRED FIELDS BELOW... THANKS!

REQUIRED FIELDS ON THIS PAGE
YOU MUST COMPLETE ALL OF THESE

Username
Password
Confirm Password
Email Address
Confirm Email Address
Random Question
Random Question #2




User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
PLEASE READ BELOW PRIOR TO ENTERING AN EMAIL ADDRESS!

ATTENTION!

YOU MUST ACTIVATE YOUR ACCOUNT!

Activation requires you reply to an email we will send you after you register... if you do not reply to this email, you will not be able to view certain areas of the forum or certain images... nor will you be able download software.

AN INVALID EMAIL ADDRESS WILL CAUSE YOUR ACCOUNT TO BE DELETED!

See our banned email list here: Banned Email List

We DO NOT respond to spamcop, boxtrapper and spamblocker emails... please add @hometheatershack DOT com to your whitelist prior to registering or you will get nowhere on your registration.


Email Address:
OR

Log-in










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



Posting Rules  
You may post new threads
You may 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 is not allowed!
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


For the best viewing experience please update your browser to Google Chrome