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This is a two channel version of the the original dualOPA impedance converter here. This lets you take two discrete audio channels out of one microphone that has wither two capsules in it, or both sides of a dual diaphragm condenser capsule. Then you can create any pattern you like in post such as full Omni, Cardioid or Figure Eight. Or, any variation in between! It is very quiet using a dual OPA1642 opamp and is fully powered by Phantom Power coming in on the two channels from a mic preamp. There is one common ground connection.

Here is the associated Instructable :


Bill of materials used in this project

OPA1642 (595-OPA1642AID)
2
2.2K 1/4W 1% MF (MFS1/4DCT52R2201F)
8
47 1/4W 1% MF (MFS1/4DCT52R47R0F)
4
200 1/4W 1% (MFS1/4DCT52R2000F)
2
47K 1/4W 1% (MF1/4DC4702F)
4
1Gig 1/4 W (279-RGP0207CHK1G0)
2
12V Zener (78-TZX12D)
2
47uF 63V (667-EEU-EB1J470SJ)
4
47uF 35V (667-EEU-EB1J470SJ)
6
.1uF (505-MKS02.1/63/20 )
4
Feb 04,2021
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    • Pedro Angel from COLOMBIA
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