Jump to content



Sign up for a free account to remove the pop-up ads

Signing up for an account is fast and free. As a member you can join in the conversation, enter contests and remove the pop-up ads that guests get. Click here to create your free account.

Photo
- - - - -

Help to connect a powered subwoofer to amplified out of the receiver


This topic has been archived. This means that you cannot reply to this topic.
2 replies to this topic

#1 of 3 OFFLINE   Krish079

Krish079

    Auditioning



  • 1 posts
  • Join Date: Nov 27 2011

Posted November 27 2011 - 09:26 PM

Hello all, need some help regarding subwoofer connection, connect a powered subwoofer (LFE in) to a amplified out (+/- wired clip-in) of the receiver. I have an Onkyo RT340 receiver and used the speakers provided in the HT package that used a passive subwoofer. Now I have a JBL powered sub-woofer with me but not sure if it can be connected. The receiver does not have a LFE out, it only has a positive/negative cable connection for sub-woofer probably the amplified out. New subwoofer has only LFE input. Please help.

#2 of 3 OFFLINE   Jason Charlton

Jason Charlton

    Screenwriter



  • 2,952 posts
  • Join Date: May 16 2002
  • Real Name:Jason Charlton
  • LocationBaltimore, MD

Posted November 28 2011 - 03:11 AM

Why did you purchase a powered subwoofer to use with a receiver that does not have a pre-out for subwoofer?


That's like buying a high-end fuel injection system for your bicycle.


You can't take the already amplified signal and feed it into the low-level input on the subwoofer.  The sub will try to amplify an already-amplified signal and most certainly introduce distortion and possibly damage the subwoofer.


You need a new receiver - one with a pre-out for a powered subwoofer.  They can be found easily and decent models can be had for ~$300.


Are you new to the Home Theater Forum? Stop by the New Member Introductions area and introduce yourself! See you there!


#3 of 3 OFFLINE   John Brill

John Brill

    Supporting Actor



  • 519 posts
  • Join Date: Nov 03 2003

Posted November 28 2011 - 03:32 AM

You can't take the already amplified signal and feed it into the low-level input on the subwoofer.  The sub will try to amplify an already-amplified signal and most certainly introduce distortion and possibly damage the subwoofer.

Well, he could have bought a powered subwoofer that has speaker line inputs but I don't believe JBL makes one of those. The Polk Audio PSW Series, for example have speaker level inputs. Otherwise, if you want to keep your sub and it only has an LFE input, you need to upgrade your receiver and stay away from the proprietary HTIB all-in-one receivers. JB