FIIO RR13 is a pocket-sized stereo FM radio that combines classic analog tuning with modern audio engineering, built-in speakers, headphone output, and a dedicated analog headphone amplifier mode.

Its professional Si4831 FM receiver, custom-shaped internal antenna, detachable telescopic antenna, mechanical luminous dial, and replaceable rechargeable battery make it suitable for everyday radio listening at home or on the move.

Why it stands out

Professional Si4831 FM Receiver

The Silicon Labs Si4831 radio chip provides stable FM reception and covers both the standard 87–108MHz band and the 76–90MHz Japanese FM band.

Built-in Stereo Speakers

Dual ultra-thin five-magnet speakers and independent amplifier channels allow RR13 to play radio or connected audio without external headphones.

Internal and External Antennas

A custom-shaped antenna is built into the compact body. The included detachable 3.5mm telescopic antenna can improve reception when using the built-in speakers.

Dedicated Headphone Amplifier Mode

Switch to AMP mode and connect a compatible analog-output adapter cable to use RR13 as a portable headphone amplifier, delivering up to 80mW + 80mW at 32Ω.

Best for

• Listeners who enjoy manual FM radio tuning
• Portable radio listening through headphones or built-in speakers
• Users looking for a compact retro-style audio device
• Regions using either the 87–108MHz or 76–90MHz FM band
• Users who also want a simple analog headphone amplifier

Not ideal for

• Internet radio, DAB, AM, or shortwave broadcasts
• Users who need Bluetooth, Wi-Fi, or internal music storage
• Direct digital USB audio without a compatible DAC adapter cable
• High-impedance or very demanding full-size headphones

EMiUZEK Buying Notes

• RR13 supports FM radio only; it does not support AM, DAB, Bluetooth, Wi-Fi, or internet radio.
• The USB-C port is primarily for charging and analog input in AMP mode. Digital sources require a compatible USB-C cable or adapter with a built-in DAC.
• The 3.5mm port is used for headphones in HP mode and for the included telescopic antenna in SPK mode.
• Use a protected 3.7V 10440 rechargeable lithium battery with the correct polarity when replacing the supplied battery.

FAQ

Does FIIO RR13 support AM radio?

No. RR13 is an FM-only radio supporting 87–108MHz and 76–90MHz frequency ranges.

Can RR13 play without headphones?

Yes. Select SPK mode to listen through its built-in stereo speakers.

How do I improve FM reception?

In speaker mode, connect the supplied telescopic antenna to the 3.5mm port and fully extend it. Location, surrounding buildings, electrical interference, and local broadcast strength can affect reception.

Can RR13 work as a USB DAC?

RR13 does not contain a digital USB DAC. In AMP mode, it can accept analog audio through USB-C when used with a compatible adapter cable containing its own DAC.

Can I use RR13 as a headphone amplifier?

Yes. Select AMP mode, connect a compatible analog source through USB-C, select HP output, and connect 3.5mm headphones.

Is the battery replaceable?

Yes. RR13 uses a protected rechargeable 450mAh 10440 lithium battery. Observe the correct positive and negative orientation when replacing it.

Does RR13 have a sleep timer?

Yes. The automatic power-off timer can be set to 30 or 60 minutes.

HOW TO CONNECT

FM Radio with Headphones

Source icon: Radio Tower

Source: FM Broadcast

Connection: Built-in Antenna / Headphone Cable

Output connection: 3.5mm Headphone Output

Target icon: Headphones

Output: Wired Headphones / Earphones

Note: Select FM1 or FM2 and set the output switch to HP.

FM Radio with Built-in Speakers

Source icon: Radio Tower

Source: FM Broadcast

Connection: Internal Antenna / Detachable Telescopic Antenna

Output connection: Built-in Speaker Output

Target icon: Speaker

Output: Built-in Stereo Speakers

Note: Set the output switch to SPK and connect the telescopic antenna to the 3.5mm port when stronger reception is required.

Portable Headphone Amplifier

Source icon: Smartphone

Source: Smartphone / Tablet / Computer

Connection: Compatible USB-C DAC Adapter Cable

Output connection: 3.5mm Headphone Output

Target icon: Headphones

Output: Wired Headphones / Earphones

Note: Select AMP mode. The connected adapter must provide analog audio output.

Technical Specifications

Feature	Specification
Product type	Portable stereo FM radio and analog headphone amplifier
Radio chip	Silicon Labs Si4831
Analog audio chip	Custom FIIO DDB AS100
FM1 frequency range	87–108MHz
FM2 frequency range	76–90MHz
Antenna	Built-in custom-shaped antenna and detachable 3.5mm telescopic antenna
Headphone output	3.5mm single-ended
Recommended headphone impedance	8–100Ω
AMP output at 32Ω	≥80mW + 80mW
Built-in speakers	8Ω, 1W ×2
Sound settings	BASS OFF / BASS 1 / BASS 2 with 3D effect
Controls	Analog tuning knob, volume knob, mode switch, output switch, sound-effect switch
Sleep timer	Off / 30 minutes / 60 minutes
USB connection	USB-C charging and compatible analog audio input
Power requirement	DC 5V/2A
Battery	Replaceable protected 450mAh 10440 rechargeable lithium battery
Charging time	Approximately 2.5 hours
Radio battery life	Approximately 7 hours with headphones; approximately 4 hours with speakers
AMP battery life	Approximately 18 hours with headphones; approximately 4 hours with speakers
Dimensions	Approximately 85.6 × 43.4 × 16.4mm
Weight	Approximately 76g
Available colors	Retro Gold / Black / Red / Silver

What's in the box, manuals and downloads

• FIIO RR13 ×1
• USB-A to USB-C charging cable ×1
• Detachable telescopic antenna ×1
• Quick start guide ×1
• Warranty card ×1
• Visit the official FIIO support center for manuals and product information

Additional Product Content

RR13 operating modes

Mode	Frequency or input	Available output
FM1	87–108MHz FM radio	3.5mm headphones or built-in speakers
FM2	76–90MHz FM radio	3.5mm headphones or built-in speakers
AMP	Compatible analog input through USB-C	3.5mm headphones or built-in speakers