Bottlehead Forum

General Category => General Discussion => Topic started by: mchurch on April 11, 2012, 06:36:12 PM

Title: Interconnect Length
Post by: mchurch on April 11, 2012, 06:36:12 PM

I don't know if this has been asked before, but dies anyone know what length of interconnect I can use between the ForeplayIII and Paramounts. I am trying to re-arrange my set up and just want to know what distances I can get away with, without de-grading the signal. Any help will be appreciated.


Cheers

Mike

Title: Re: Interconnect Length
Post by: Paul Joppa on April 11, 2012, 07:30:26 PM

Five meters should be no problem, and you can probably drive 10 meters with little or no audible effect.

That's theory (with a healthy dose of safety margin of course), based on the same calculations that say Seduction is good for 1, or at best 2 meters of ordinary interconnect. If anyone has direct experience, I hope they will post it - data always trumps theory.

"Nobody believes the calculation except the person who did it. Everybody believes the experiment except the person who did it." A little engineering folk wisdom  :^)

Title: Re: Interconnect Length
Post by: Grainger49 on April 12, 2012, 01:47:09 AM

My FP 2, in my last listening room, fed a 20' pair of Belden cable that was 17pF/Ft.  There was no audible loss of high frequencies.

Title: Re: Interconnect Length
Post by: mchurch on April 12, 2012, 02:14:08 AM

Paul & Grainger;

Thanks for the info, that definitely opens up my room set up potential. I was previously led to believe that runs longer than 2 meters were not good but I have seen many systems set up with longer runs so I figured I was missing something.


Cheers

Mike

Title: Re: Interconnect Length
Post by: Grainger49 on April 12, 2012, 02:35:05 AM

The two meter limit here was only for the phono stages.  Maybe only the Seduction, but IIRC the Eros final stage is the same. 

The key is just to be certain your capacitance is under, say, 20pF/Ft.  Belden 89259 is 17pF/Ft.