Piezo: does the phase matter?

[PaulJam]

Hi,
I have a question to those of you who have experience with piezo.
I recently bought a used JP7 with piezo and i'm loving the instrument, but there is one thing that makes me wonder.

It seems as if the piezo saddles of the low E, the D and the high b strings have the opposite phase than the other strings - so each string has the opposite phase of its adjacent string(s).
See attached image (the green channel of each track is the piezo signal from the stereo jack, the other is the magmetic signal from the stereo jack).

That seems unusual to me. Is this normal? And does this have any audible influence on the sound of the piezo (either alone or blended with the magnetics) or can i savely ignore it?

 

[Spudmurphy]

Hi PJ. The only info I can give on this is as follows:-

I bought a second hand JP6 (click on link in my sig) and rebuilt the Piezo by purchasing new saddles.

Customer service advised me that some of the saddles are stamped with a letter "R" on them signifying reverse polarity - so on this basis I would say that it is normal to have "opposite phase" on the piezo.

 

[DrKev]

As Spud mentions, fire off an email to customer service and they'll let you know what's what.

 

[PaulJam]

Thanks for the quick replies.
I'll contact the customer service when i get home.

Spudmurphy:
btw, awesome work on restoring the JP6.

 

[Spudmurphy]

Thanks for the quick replies.
I'll contact the customer service when i get home.

Spudmurphy:
btw, awesome work on restoring the JP6.

Cheers, thanks for that.

Welcome to the forum and try and post some pics of your guitar?

Let us know how you get on.

 

[A.J.]

Every other string is reverse phase for the JP Piezo. For a 7 string the low E, D and high B are all reverse phase. For a 6 string the A, G and high E are reverse phase.