On a Semi hollow, perhaps having a thin front face of good quality timber (Spruce? Maple?) with a chambered body beneath. I like the sound on cellos or uprights, but have only heard it on an acoustic bass, and then through a preamp. On paper piezos (even the cheap buzzers) have a great frequecy reponse. Purely for aethetics i also really fancy the idea of a smooth top with no pickups visible! Now i'm taking my time on this one, but am aiming for making as much of it myself as possible, for as little as possible I like the idea of an extra bite or ambient resonance for that upright sound. I'm thinking of attempting a fretless 6 self build soon (possibly semi-hollowbody), and had considered either a piezo system or a dual magnetic and piezo combo. if you source your parts correctly, less than 2 quid. Now you can stick your new pickup anywhere. Stick in the piezo, put a bit more epoxy resin in. Put in a bit of epoxy resin into the bottle top. Solder a cable with a jack socket on the piezo. I think Maplins may have them.Īnyway, the easiest way of doing this is get a bottle top (yup, off your favourite bear), get a piezo that fits in it. I'm an electrics newb, and can solder, wire a plug or a bass, but would this work? If not why not?Īnd would it be possible to wire several of these together to get a better output/signal from a bass? Seems too good to be true given they cost about a pound, and cheapo piezo sets are about £40! If you double the load, both become less sensitive and additively produce the same signal strength.I read an article somewhere about turning a piezo buzzer into a pickup by removing the casing and soldering into a jack output. a single coil and have different tone and the preamp circuitry is expecting to see a specific impedance. Its not going to function like humbucker vs. The single Piezo can be blended with those and give you even more variety, Having a second piezo close to the first capturing the same tones is redundant. Guitar pickups produce different tones along the string and they blend together for different bass and treble tones. You could adjust two preamp/EQ's differently but its pretty futile unless the sources produce different tones. Having a second transducer will require a second preamp and mixing the two signals wont add much you couldn't get with a EQ preamp combo. You'll likely have to blend it with the guitar pickups to be useful for most stuff. If you're placing the transducer under a Tele or Strat type bridge, the tone isn't going to be as good, as it could directly off the string saddles. You get the best sound quality off the saddles themselves so they will produce the best tone. If they are close together, you wont have the phase issue but they wont have any variance in tone so why bother. On a solid body, I just don't see any benefit. You may be able to use two disks set on either side of an acoustic bridge for some stereo like effect but Its likely to fail because the sound board conducts sound from all the strings. Using two contact pickups spaced apart is a bad application. Strings vary in frequency vibrating the wood, so you wind up getting some notes that are additive and loud, and others are subtractive and dead. If you picture a lake and you throw two stones in different parts of the lake, when the waves meet up they may become additive and increase in size or they may be subtractive and the upstroke on one wave cancels the other out. It was unexpected and it took me awhile to figure out it wasn't only a tone issue. If I turn both up it sounds awful because the tones cancel each other and makes the tone sound muted and plastic. Since I glued the disk into place I' stuck with frequency and phase cancellation. In my case, I had placed the disk to the right of the bridge and slightly towards the treble side. If I had installed the disk after the bridge and moved it around to find a sweet spot that complemented the first it could have worked out. Its not much but it does cause the same kinds of problems with phase two mics do recording the same source of sound. Sound doesn't travel instantly throughout the body and the pickup closest to the string will produce a signal before the more distant pickup. The dick not only sounded muter its had phase problems with the under bridge piezo. I used a disk type in an acoustic, the later added an under bridge type. You'll likely find one is better than the other and the second detracts from the first when they are both used.
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