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<blockquote data-quote="Art Welter" data-source="post: 32409" data-attributes="member: 52">Re: LED Par cans cause buzz on some acoustic pickupsUnfortunately, the problem you describe is caused by a noisy RF source (the cheap LED light dimmers) and pickups that are probably really low output, very high impedance.If you are not using good active direct boxes for those pickups, which will often give a far better signal to noise ratio than even the best passive devices, that would be the place to start. The wireless body pack is a good idea, but they are usually designed for magnetic guitar pickups, which have boatloads more output than some of the piezo transducers on acoustic instruments.A single coil magnetic pickup has the shield connected to the strings, so by standing at the proper angle to a noise emitter (your lights) the noise can be reduced if the guitar player is touching the strings.AFAIK, Piezo pickups don&#039;t usually have the shield connected to the strings, and even if they did, if the strings are gut (nylon) they would not connect the shielding to the player&#039;s body.I am curious what type of direct boxes you are using with the noisy acoustic pickups.</blockquote>

[QUOTE="Art Welter, post: 32409, member: 52"] Re: LED Par cans cause buzz on some acoustic pickups Unfortunately, the problem you describe is caused by a noisy RF source (the cheap LED light dimmers) and pickups that are probably really low output, very high impedance. If you are not using good active direct boxes for those pickups, which will often give a far better signal to noise ratio than even the best passive devices, that would be the place to start. The wireless body pack is a good idea, but they are usually designed for magnetic guitar pickups, which have boatloads more output than some of the piezo transducers on acoustic instruments. A single coil magnetic pickup has the shield connected to the strings, so by standing at the proper angle to a noise emitter (your lights) the noise can be reduced if the guitar player is touching the strings. AFAIK, Piezo pickups don't usually have the shield connected to the strings, and even if they did, if the strings are gut (nylon) they would not connect the shielding to the player's body. I am curious what type of direct boxes you are using with the noisy acoustic pickups. [/QUOTE]

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