Bottlehead Forum

Bottlehead Kits => Legacy Kit Products => Foreplay III => Topic started by: mozarti on February 02, 2014, 02:01:34 PM

Title: polarity of FPIII
Post by: mozarti on February 02, 2014, 02:01:34 PM

I have a Foreplay III, which I made few years ago, but I forget whether it inverts polarity or preserves the polarity of the signal.  Thank you in advance for your help.

Title: Re: polarity of FPIII
Post by: Grainger49 on February 02, 2014, 02:45:19 PM

Every Bottlehead preamp inverts.  That is past and present.

Title: Re: polarity of FPIII
Post by: mozarti on February 02, 2014, 02:50:24 PM

Thank you.  Much appreciated. 

Title: Re: polarity of FPIII
Post by: Gerry E. on February 03, 2014, 03:59:00 AM

Quote from: Grainger49 on February 02, 2014, 02:45:19 PM

Every Bottlehead preamp inverts.  That is past and present.

I know you wrote "Every" but does that include the BeePre?  How about the Paramount 300Bs?  Thanks.

Gerry 

Title: Re: polarity of FPIII
Post by: Paul Birkeland on February 03, 2014, 06:24:59 AM

Quote from: Gerry E. on February 03, 2014, 03:59:00 AM

I know you wrote "Every" but does that include the BeePre?  How about the Paramount 300Bs?  Thanks.

Gerry

The BeePre does invert.  The Paramounts are not preamps, and they do not invert polarity.

The Eros/Reduction also do not invert polarity.

Title: Re: polarity of FPIII
Post by: Gerry E. on February 03, 2014, 07:56:09 AM

Quote from: Caucasian Blackplate on February 03, 2014, 06:24:59 AM

The BeePre does invert.  The Paramounts are not preamps, and they do not invert polarity.

Thanks PB!  So, if my BeePre inverts and my Paramount 300Bs don't, should I purposely wire my speakers black-to-red and red-to-black?  I know this is a controversial subject and doesn't even take into account that many digital recordings have inverted polarity.  I'm also aware that the usual answer is to "try it both way and whichever sounds better...".

Gerry   

Title: Re: polarity of FPIII
Post by: Paul Birkeland on February 03, 2014, 08:00:24 AM

Quote from: Gerry E. on February 03, 2014, 07:56:09 AM

  I know this is a controversial subject and doesn't even take into account that many digital recordings have inverted polarity. 

Some analog recordings also likely inverted. I would advise not worrying about it, stuff like this can drive you crazy and be relatively unimportant.