{"id":1169,"date":"2018-10-23T22:24:55","date_gmt":"2018-10-23T20:24:55","guid":{"rendered":"http:\/\/www.phase57.com\/?page_id=1169"},"modified":"2021-02-27T23:50:55","modified_gmt":"2021-02-27T22:50:55","slug":"contact-mic-pre","status":"publish","type":"page","link":"https:\/\/192.168.1.59\/build\/contact-mic-pre\/","title":{"rendered":"Mic pre-amp"},"content":{"rendered":"\r\n

building a pre-amp box for contact microphones<\/h3>\r\n\r\n\r\n\r\n
\"portable<\/a>
finished pre-amp for the contact mic connected to my Zoom H5 Phantom powered input.<\/figcaption><\/figure>\r\n\r\n\r\n\r\n
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Different sources pointed out that when you work with Piezo contact mics it’s best to use a pre-amp to get the best possible audio quality. Such a device uses a high impedance input buffer. Because if you connect a Piezo element directly to your recorder or the input channel of your mixing desk, there will be an impedance mismatch and that just doesn’t sound good at all. So I taught I’d build one myself and post about it here.
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enclosure<\/h4>\r\n\r\n\r\n\r\n
\"metal<\/a>
1590BS Hammond natural die-cast enclosure 112 x 60 x 42mm<\/figcaption><\/figure>\r\n\r\n\r\n\r\n

I choose this box from Hammond because it is metal and therefor very sturdy and shielding the circuit inside. Links at the bottom of this page.<\/p>\r\n\r\n\r\n\r\n

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fitting pre-amp circuit<\/h4>\r\n\r\n\r\n\r\n