NEED 2 GET A 12 VOLT CENTER POSITIVE POWER SUPPLY + QUARTER INCH TO 3.5 MM CABLE
trying to find a balanced a circuit with a balanced input so that it is less noisy
5 Simple Preamplifier Circuits Explained - Homemade Circuit Projects
Looking for a single power supply balanced microphne preamp design using 5534 - Page 1
mason has an NE5532 - classic audio op amp, relatively low noise
https://www.ti.com/lit/ds/symlink/ne5532.pdf?ts=1738481262231&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FNE5532
Make a variable resistor from a potentiometer by soldering the middle pin to either side of the pins.
Test the polarity (which is ground? which is power?) of the cord (USB B to Barrel Jack) i have.
place one probe on the outside
place on probe on the inside
see which probe is positive
12V Center Positive 2.5A-3A AC Adapter LCD Charger Power Supply Cord 5.5mm 2.5mm
Making an Enclosure