4. RR13 input and output instructions

RR13 input instructions

1. USB input

Supports external 5V–2A USB power cable to supply power to the device.

In AMP mode, it also supports connection via a Type-C to Type-C cable with a built-in DAC chip (connecting the DAC end to a player/phone/PC that supports USB audio output, and the input end to the RR13). This allows the RR13 to function as a power amplifier for audio input.

2. Radio signal input

Features a built-in enhanced custom-shaped antenna, the RR13 can directly receive FM radio signals, covering frequencies from 76MHz to 108MHz.

When switched to SPK (speaker out) mode, the external telescopic antenna can be plugged into the 3.5mm headphone port to improve radio signal reception.

RR13 output instructions

1. Output modes and ports

Headphone out (HP): Connect 3.5mm headphones to the 3.5mm headphone port for audio output.

Speaker out (SPK): Audio is output through the built-in speaker of the RR13.

2. Sound effect adjustment

You can slide the lower 3-position bass toggle on the right side to switch between BASS OFF/BASS 1 (bass enhancement effect)/BASS 2 (bass enhancement + 3D surround sound effect).

3. Status indicator light

Battery life/Power off timer indicator light: Displays the device’s battery level and sleep timer settings (OFF—Green; 30min—Yellow; 60min—Blue).

Stereo indicator light: In FM mode, the indicator light stays on when stereo output is active. The brightness of the indicator light reflects the strength of the stereo signal.

Tuning indicator light: The brightness of the indicator light shows the current radio signal strength. Brightly lit—strong signal; dimly lit—moderate signal; off—no signal received.