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Amazon Echo Barrel Jack

Amazon Echo smart speakers use a proprietary barrel jack power connector. The original Echo uses a 3.5mm or 4.0mm barrel connector at 15W-30W depending on model generation.

// Specifications
Standard
Amazon Echo proprietary barrel
Connector
Barrel jack 3.5mm x 1.35mm or 4.0mm
Voltage
15V or 21V depending on model
Power
15W to 30W
Use Case
Amazon Echo Echo Plus Echo Studio
Note
Spec varies by Echo generation
// Pin Reference Table
Pin Name Function Type
1 Center Positive DC power positive PWR
2 Outer Sleeve DC power ground GND