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headphone input - use & defeat

post #1 of 5
12/17/11 at 7:34pm
Thread Starter 

Is there any product that will allow me to plug in a set of headphones into my Denon front panel AND the receiver/amp/device continues to drive the speakers too?

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post #2 of 5
12/19/11 at 7:38am
Quote:
Originally Posted by abluesman View Post

Is there any product that will allow me to plug in a set of headphones into my Denon front panel AND the receiver/amp/device continues to drive the speakers too?



Depends on the circuit, but probably not without hacking it.

 

Typically the headphone jack socket will be wired in a way that plugging in the headphones physically disconnects the speakers.

 

Quite a few socket types have this feature. If that is the case you would need to modify it and perhaps employ a custom bypass switch or similar, if possible.

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post #3 of 5
12/19/11 at 8:37pm
Thread Starter 

thanks

 

what I thought - no magic bullet

It's a new tv for my aged parents & I'd like headphones for old dad & regular speakers at different volumes for mum.

 

asked LG & they confirmed - only way is to hack - not a possibility.

 

 

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post #4 of 5
12/19/11 at 8:51pm

You should be able to bypass this if they use a TRRS (Tip, Ring 1, Ring 2, Sleeve) jack, in this situation they would use the sleeve portion of the headphone connector to short between the RS (Ring 2, Sleeve) of the jack to change the state of a relay inside the receiver that disrupts the signal from the preamp to the amp.  IF this is true, you can get a TRRS connector and wire that to a typical TRS jack, at that point you'll have to figure out if the amp is using Ring 2 or Sleeve as the audio signal ground, and then wire that to the Sleeve of the TRS.

 

EDIT:  Well after a quick search, I remember that no one seems to make a 1/4" TRRS connector....


Edited by samsquanch - 12/19/11 at 9:01pm
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post #5 of 5
12/19/11 at 9:11pm
Quote:
Originally Posted by abluesman View Post

thanks

 

what I thought - no magic bullet

It's a new tv for my aged parents & I'd like headphones for old dad & regular speakers at different volumes for mum.

 

asked LG & they confirmed - only way is to hack - not a possibility.

 

 



Why not just get the audio out and then split to an external speaker for Mum, and a headphone amp for Dad

 

 

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