Hw-104 — Amplifier Datasheet __exclusive__

Although the HW-104 has no built-in volume control, you can add a potentiometer on the input lines (10kΩ log taper) or control it via an Arduino and a digital pot like the MCP41010.

| Terminal Label | Function | Notes | | :--- | :--- | :--- | | | Positive DC power input (12-16V) | 2.1mm barrel jack or screw terminal | | GND | Power & signal ground | Common ground | | L-IN | Left channel audio input | Signal ground via GND terminal | | R-IN | Right channel audio input | Signal ground via GND terminal | | L-OUT | Left speaker output (+) | BTL – both terminals are floating | | R-OUT | Right speaker output (+) | BTL – do not connect to chassis ground | | GND (speaker) | Not present on BTL designs | No separate speaker ground on HW-104 | hw-104 amplifier datasheet

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Although the HW-104 has no built-in volume control, you can add a potentiometer on the input lines (10kΩ log taper) or control it via an Arduino and a digital pot like the MCP41010.

| Terminal Label | Function | Notes | | :--- | :--- | :--- | | | Positive DC power input (12-16V) | 2.1mm barrel jack or screw terminal | | GND | Power & signal ground | Common ground | | L-IN | Left channel audio input | Signal ground via GND terminal | | R-IN | Right channel audio input | Signal ground via GND terminal | | L-OUT | Left speaker output (+) | BTL – both terminals are floating | | R-OUT | Right speaker output (+) | BTL – do not connect to chassis ground | | GND (speaker) | Not present on BTL designs | No separate speaker ground on HW-104 |