Blending piezo with passive pickup - possible?

[Blille]

I am sorry if you are offended
maybe i chose the words wrong

You have obviously never done it before.
Therefore you really shouldn't speak with authority

I have "got lucky" three different times now

So i would think that i have some knowledge on the subject.

Listen more grasshopper
Fight that urge to use internet as source of research

There are many fools in the world
And they all have blog accounts

No need to be condescending we’re all here just sharing and I appreciate everyone trying to help.

Really glad it worked out for you. It may work in this situation as well but it’s hard to tell so I’d rather not risk it given it involves drilling someone else’s rig.

 

[freefrog]

Appreciated. The difference of impedance happens in some frequencies that may not bother everyone depending on the mix. Based on my experience with pedals which were with smaller impedance differences and that it’s not my guitar I’m not going to recommend drilling the guitar without being 200% sure.

I fully agree with the idea that a theoretically annoying phenomenon might bother people or not, once they deal with it empirically. In the 80's, I've owned an acoustic guitar with a mag PU in the soundhole + a passive piezo ribbon under the bridge and have never succeeded to make them work together... in the same way that I've struggled more recently with non musical resonances due to a piezo compared to some mag pickups in the same guitar... but why would it not work for other people in a slightly different situation ? Like with any guitar device, it depends on the exact gear involved, on the way to mount and to use it and on the expectations of the player... Reason why I've not been surprised to see above a demo on a passive blending evoked as successful.

You seem to be decided for a Y output jack, anyway, so the problem seems solved by advance.

That say and if I can add something to my own rambling without annoying you, just to be in phase with myself... my doubts in this precise case were due to the following parms:
-a P90 is most often a high inductance pickup (of easily 7H or more). As soon as it it associated to a not so low capacitive load, it gets dark and muddy very fast. And precisely, a piezo acts like a cap added from hot to ground once in parallel with a mag PU - some of my old notes mention a capacitance of 1.5nF in a formula about piezo's : it's the capacitive load of 9m of standard cable or more!
-reciprocally, the resistive load of a magnetic PU + pots should result in a very low impedance, that piezo's are not meant to like: according to my archives, if the high pass effect of a piezo starts @ 100hz with an impedance of 1M, it shifts at 2100hz (!) once the impedance lowered @ 50k...
Hence my "intuition" in a previous answer.

But nothing replaces direct experience so my wordy replies are useless.

Let us know how you'll have dealt with this question finally. Good luck in your work.

Personally, I don't exclude to post in the future some electrical comparison between mag PU alone and mag PU + piezo, if time permits.

 

[Blille]

I fully agree with the idea that a theoretically annoying phenomenon might bother people or not, once they deal with it empirically. In the 80's, I've owned an acoustic guitar with a mag PU in the soundhole + a passive piezo ribbon under the bridge and have never succeeded to make them work together... in the same way that I've struggled more recently with non musical resonances due to a piezo compared to some mag pickups in the same guitar... but why would it not work for other people in a slightly different situation ? Like with any guitar device, it depends on the exact gear involved, on the way to mount and to use it and on the expectations of the player... Reason why I've not been surprised to see above a demo on a passive blending evoked as successful.

You seem to be decided for a Y output jack, anyway, so the problem seems solved by advance.

That say and if I can add something to my own rambling without annoying you, just to be in phase with myself... my doubts in this precise case were due to the following parms:
-a P90 is most often a high inductance pickup (of easily 7H or more). As soon as it it associated to a not so low capacitive load, it gets dark and muddy very fast. And precisely, a piezo acts like a cap added from hot to ground once in parallel with a mag PU - some of my old notes mention a capacitance of 1.5nF in a formula about piezo's : it's the capacitive load of 9m of standard cable or more!
-reciprocally, the resistive load of a magnetic PU + pots should result in a very low impedance, that piezo's are not meant to like: according to my archives, if the high pass effect of a piezo starts @ 100hz with an impedance of 1M, it shifts at 2100hz (!) once the impedance lowered @ 50k...
Hence my "intuition" in a previous answer.

But nothing replaces direct experience so my wordy replies are useless.

Let us know how you'll have dealt with this question finally. Good luck in your work.

Personally, I don't exclude to post in the future some electrical comparison between mag PU alone and mag PU + piezo, if time permits.

Lol all noted.

If it were my guitar I could be more courageous. But this is a friend’s hollow archtop so installing a 9v rig is no simple feat, which is explains my bias towards ripping the piezo chord, drilling a very small hole under the bridge and connecting it to a new jack.

 

[Chistopher]

Hmm... Esquire with 3 way switch Bridge/Piezo/Midi? My brain is having some ideas with this one.