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12-18V 47 amp power supply is a relatively well-known classic amp circuits， because of its simple structure， the sound is good， the majority of lovers， dual positive and negative supply voltage difference between high-end version 9-15v now the standard version: To original German WIMA !! Full gilded IC socket， high-end version of the import system audio capacitors standard Edition imported capacitors (with different high)

PCB Size: 8.3 × 4.6cm

Process: KB-level military board high-precision CNC machining

Sheet thickness and specifications: 1.6mm KB Kingboard A grade FR4 board

This circuit design revision after two times (see below for an older version of the picture)， to optimize the old version of the original 47 amp circuits use less wiring route optimization， high frequency simulation test results outstanding， the line after a fine layout， you can use cheap NE5532 play a good sound performance

 

 

Installation Notes:

1: 7 op amps use NE5532， scalable OPA2134 sounds good， but is compatible with OPA2604 / OPA2132 / LME49720 like.

2: Dual 5-18V DC power supply can be， voltage can be different depending on the voltage range of the op amp， transformer power more than 10W

3: Working with sections 2 9V battery-powered!

4: Potentiometer 10-50K Available

5: Power Interface VCC represents a positive voltage VDD representatives negative voltage!

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