steve - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 17th December 2011, 11:03 PM   #1
diyAudio Member
 
Join Date: Dec 2011
Default steve

I purchased a Polk PSW110 sub and when i got home and looked at the back i see no LFE sub-in hookup, just all the speaker lines and a left right (red white) RCA in. My question is if i use a splitter at the end of my sub cable will i get the same quality sound output? The store said to just plug my sub cable into the right side RCA.
  Reply With Quote
Old 17th December 2011, 11:38 PM   #2
diyAudio Member
 
revboden's Avatar
 
Join Date: Feb 2011
quality sound output? from a polk...

Just use a Y cable to split the sub output into the L/R inputs.
  Reply With Quote
Old 18th December 2011, 12:13 AM   #3
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
Usually if you have just a single sub out you plug it into the right RCA as the store suggested. You can use a splitter if it makes you feel better but I think you'll find there's no difference.
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote
Old 18th December 2011, 12:29 AM   #4
diyAudio Member
 
Join Date: Dec 2011
Default steve no lfe input on sub

will the filters of the sub and reciever be competing. and am i getting as good performance as i would with dedicated lfe
  Reply With Quote
Old 18th December 2011, 01:12 AM   #5
diyAudio Member
 
revboden's Avatar
 
Join Date: Feb 2011
Set the sub's LP filter to 160Hz and let the receiver handle the XO.
  Reply With Quote
Old 18th December 2011, 01:39 AM   #6
diyAudio Member
 
Michael Chua's Avatar
 
Join Date: Jul 2006
Location: Calais, ME
I have the same Polk PSW110. There are a few ways to wire it up. I assume you are using a Receiver with LFE out.

From the outset, you need to decide whether you want to use the LFE or to bypass it and use the PSW110 crossover. Though the LFE has a Low Pass Filter, I believe it is more than that. It is actually the Low Frequency Effects used in movies, like in Surround Sound. So, if you are watching movies and you have a subwoofer hooked up to the Receiver's LFE Out, the Low Frequency Effects (explosions, rumble of earthquakes etc.) will be channeled out through the LFE to the sub instead of to the Main Speakers. Basically, it's for movies Surround Sound (DTS Digital Dolby etc).

If you are only using your Receiver for music, you may want to bypass the LFE Out.

Simply connect your Receiver LINE OUTS to the PSW110 Line IN (L and R).

If you don't have LINE OUTS, you can use the PSW110 "SPEAKER LEVEL INPUT". Your speakers will be connected to the Receiver as per normal. Run another set of speaker wires from the Receiver Speaker L/R Out to the PSW110 "SPEAKER LEVEL INPUT L/R". This way, you are actually using the power amp output to drive the PSW110.

Whether you use the LINE IN or the SPEAKER LEVEL INPUTS, crossover will be by the PSW110 internal crossover (provided you set the Receiver to Full Range). You'll need to check you Receiver's Manual for the correct setting. I think it's "Large" or something similar.
__________________
AmpsLab.com
  Reply With Quote
Old 18th December 2011, 03:31 AM   #7
diyAudio Member
 
leadbelly's Avatar
 
Join Date: Dec 2002
Location: Calgary, Alberta
The short answer to your question is just use a Y cable or only use either L or R, if it works and the output is loud enough for you, then your work is done; you haven't lost any quality.

The longer answer is that if you have done this and there's a problem such as picking up hum from a long cable run or volume seems too low, then the answer is to make a custom cable with a single connector at the receiver end, and dual connectors at the sub end, with the RCA pins shorted between the 2 but only one connector connected to shield.
__________________
Aerodynamics are for people who can't build engines. Enzo Ferrari

Last edited by leadbelly; 18th December 2011 at 03:34 AM.
  Reply With Quote
Old 18th December 2011, 05:09 AM   #8
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
Quote:
Originally Posted by Michael Chua View Post
Run another set of speaker wires from the Receiver Speaker L/R Out to the PSW110 "SPEAKER LEVEL INPUT L/R". This way, you are actually using the power amp output to drive the PSW110.
Is this something peculiar to the Polk units?
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote
Old 18th December 2011, 01:50 PM   #9
diyAudio Member
 
leadbelly's Avatar
 
Join Date: Dec 2002
Location: Calgary, Alberta
Quote:
Originally Posted by Cal Weldon View Post
Is this something peculiar to the Polk units?
No no; his wording is awkward but he is basically saying that you can either use line level or speaker output connections to the Polk, not that you use both at once.
__________________
Aerodynamics are for people who can't build engines. Enzo Ferrari
  Reply With Quote
Old 18th December 2011, 02:51 PM   #10
diyAudio Member
 
Michael Chua's Avatar
 
Join Date: Jul 2006
Location: Calais, ME
Quote:
Originally Posted by Cal Weldon View Post
Is this something peculiar to the Polk units?
I don't think so. The High Level Inputs (SPEAKER LEVEL INPUTS) seem to be a common feature in active subs. . The Dayton Subs at PE have them. Click here to download the Dayton SA-240B manual. There's a good explanation on the sub inputs and the use of the LFE on the Receiver.

Leadbelly is correct. Connect one or the other (ie only the RCA or the Speakers Input). Not both at once.
__________________
AmpsLab.com
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Steve Jobs Cal Weldon The Lounge 64 18th August 2012 07:32 AM
Steve McDonald Please Opine XEAGLEKEEPER Music 2 19th October 2006 12:20 AM
Steve & Frank & Steve start a Love-In Steve Eddy Everything Else 25 6th November 2002 07:02 PM


New To Site? Need Help?

All times are GMT. The time now is 08:51 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2