Manuals+

SANSUI F81

SANSUI F81 Digital FM Radio Wireless Bluetooth Speaker User Manual

Model: F81

1. Introduction

Thank you for purchasing the SANSUI F81 Digital FM Radio Wireless Bluetooth Speaker. This portable speaker combines a digital FM radio, powerful 15W audio output, Bluetooth 5.3 connectivity, and multiple playback options including AUX, USB, and TF card. It also features a bass diaphragm for enhanced sound, HD call functionality, and colorful RGB lighting to enrich your audio experience. This manual will guide you through the setup, operation, and maintenance of your new speaker.

2. Package Contents

Please check the box for the following items:

  • SANSUI F81 Wireless Bluetooth Speaker
  • USB Type-C Charging Cable
  • User Manual
  • (May include an AUX cable depending on package variant)

3. Product Overview

Familiarize yourself with the speaker's components and controls.

3.1. Speaker Layout and Features

SANSUI F81 speaker with icons representing features: Full-range speaker, Bluetooth 5.3, Digital song selection, FM radio, Lossless music, Headphone listening, USB playback, Card playback, Long-lasting battery life.
Figure 1: Overview of SANSUI F81 key features.

The SANSUI F81 offers a comprehensive set of features for a versatile audio experience:

  • Full-Range Speaker: Delivers balanced audio across frequencies.
  • Bluetooth 5.3: For stable and high-quality wireless audio streaming.
  • Digital Song Selection: Conveniently select tracks using numerical buttons.
  • FM Radio: Built-in FM tuner for listening to your favorite stations.
  • Lossless Music Playback: Supports various audio formats for high-fidelity sound.
  • Headphone Listening: Option for private listening (via AUX port, if supported for output).
  • USB Playback: Play music directly from a USB flash drive.
  • TF Card Playback: Play music directly from a MicroSD (TF) card.
  • Long-lasting Battery Life: Extended playback time for portable use.

3.2. Controls and Ports

Detailed diagram of SANSUI F81 speaker buttons and ports, including display screen, digital keys, light mode key, record key, delete key, set key, previous track/volume down, next track/volume up, mode key, play/pause key, power/call key, USB port, TF card slot, AUX port, and Type-C charging port.
Figure 2: Detailed button and port layout.

The speaker features an intuitive control panel and essential ports:

  • Display Screen: Shows current mode, track number, frequency, etc.
  • Digital Keys (0-9): For direct channel/song selection in FM/MP3 modes.
  • Light Mode Key: Cycles through RGB lighting effects.
  • Record Key: Initiates audio recording (functionality may vary).
  • Delete Key: Deletes recorded files or presets.
  • Set Key: Used for setting FM presets or other functions.
  • Previous Track / Volume Down (V-): Short press for previous track, long press for volume down.
  • Next Track / Volume Up (V+): Short press for next track, long press for volume up.
  • Mode Key (M): Switches between Bluetooth, FM, AUX, USB, and TF card modes.
  • Play/Pause Key: Plays or pauses current audio.
  • Power / Call Key: Long press to power on/off. Short press to answer/end calls in Bluetooth mode.
  • USB Port: For USB flash drive playback.
  • TF Card Slot: For MicroSD card playback.
  • AUX Port: For wired audio input from external devices.
  • DC 5V (Type-C) Charging Port: For charging the speaker's internal battery.

4. Specifications

Technical details of the SANSUI F81 speaker:

SANSUI F81 product parameters diagram showing dimensions, color options, battery capacity, peak power, speaker size, distortion rate, Bluetooth version, input power, signal-to-noise ratio, frequency range, product size, and net weight.
Figure 3: SANSUI F81 Product Parameters.
AttributeValue
Brand NameSANSUI
ModelF81
CategorySpeakers
Speaker TypePortable
Audio CrossoverFull-Range
Number of Loudspeaker Enclosure1
PMPO15 W
Channels2 (2.0)
Input Power(W)<25 W
Output Voltage15 W
Impedance4 Ohm
Sensivity70dB
Frequency Range100Hz-18KHz
Sound ModeHi-Res Sound Mode
CodecsApt-X HD
Bluetooth Version5.3
Maximum wireless range[m]10m-20m
CommunicationAUX, Bluetooth
Input/OutputAUX
Power SourceBattery
Battery Capacity[mAh]1200 mAh
BatteryYes
Playback FunctionRadio, MP3
Support Memory CardYes
Support APPYes
Voice ControlNo
Intelligent Personal AssistantM
FeaturePhone Function
WaterproofNo
MaterialABS, Plastic
Cabinet MaterialPlastic
Height[mm]72 mm
Width[mm]49 mm
Depth[mm]130 mm
Weight[g]500 g (Net weight: 353g)
High-concerned chemicalNone
Inbox adaptorYes
CertificationCE
OriginMainland China

5. Setup

5.1. Charging the Speaker

  1. Connect the provided USB Type-C charging cable to the DC 5V port on the speaker.
  2. Connect the other end of the cable to a standard USB power adapter (5V/1A recommended) or a computer's USB port.
  3. The charging indicator (if present) will show the charging status. Allow sufficient time for a full charge before first use.

5.2. Powering On/Off

  • Power On: Long press the Power/Call Key until the display screen lights up and you hear a power-on prompt.
  • Power Off: Long press the Power/Call Key again until the display turns off and you hear a power-off prompt.

6. Operating Instructions

6.1. Bluetooth Mode

A green SANSUI F81 speaker connected via Bluetooth to a smartphone, illustrating high-speed connection and pure sound quality.
Figure 4: Bluetooth 5.3 connectivity for pure sound.
  1. Power on the speaker. It will automatically enter Bluetooth pairing mode (indicated by a flashing Bluetooth icon or voice prompt).
  2. On your mobile device, enable Bluetooth and search for available devices.
  3. Select "SANSUI F81" from the list. Once connected, you will hear a confirmation sound.
  4. You can now play audio from your device through the speaker.
  5. Use the Play/Pause Key, Previous Track, and Next Track buttons on the speaker to control playback.

6.2. FM Radio Mode

A man listening to the SANSUI F81 speaker in FM radio mode, enjoying various programs.
Figure 5: Enjoying FM radio with the SANSUI F81.
  1. Press the Mode Key (M) repeatedly until "FM" appears on the display.
  2. To auto-scan and save stations: Long press the Play/Pause Key. The speaker will scan and store available FM stations.
  3. To manually select a station: Use the Digital Keys (0-9) to directly input the frequency (e.g., 90.5 for 90.5 MHz).
  4. To switch between saved stations: Use the Previous Track and Next Track buttons.

6.3. AUX Input Mode

SANSUI F81 speaker showing connections for USB, TF card, and AUX, illustrating multiple playback options.
Figure 6: Multiple playback options including AUX, USB, and TF card.
  1. Connect one end of a 3.5mm audio cable (not always included) to the AUX port on the speaker.
  2. Connect the other end to the headphone jack or audio output of your external device (e.g., smartphone, MP3 player, computer).
  3. Press the Mode Key (M) until "AUX" appears on the display.
  4. Control playback and volume from your external device.

6.4. USB and TF Card Playback

  1. Insert a USB flash drive into the USB port or a TF (MicroSD) card into the TF card slot.
  2. The speaker should automatically switch to USB or TF card mode and begin playing audio files. If not, press the Mode Key (M) until the correct mode is selected.
  3. Supported audio formats include APE, FLAC, WAV, and MP3.
  4. Use the Play/Pause Key, Previous Track, and Next Track buttons to control playback.
  5. You can also use the Digital Keys (0-9) to directly select a track number (e.g., input 19 for the 19th song).

6.5. HD Call Function

A man using the SANSUI F81 speaker for a hands-free HD call, demonstrating its phone function.
Figure 7: Hands-free HD calling feature.

When connected via Bluetooth to your smartphone:

  • Answer Call: Short press the Power/Call Key when an incoming call rings.
  • End Call: Short press the Power/Call Key during a call.
  • Reject Call: Long press the Power/Call Key when an incoming call rings.

6.6. RGB Light Control

SANSUI F81 speaker with vibrant RGB lighting, showcasing acousto-optic synchronization.
Figure 8: Dynamic RGB lighting effects.

Press the Light Mode Key to cycle through different colorful RGB lighting effects or to turn the lights off.

6.7. Volume Adjustment

  • Increase Volume: Long press the Next Track / Volume Up (V+) button.
  • Decrease Volume: Long press the Previous Track / Volume Down (V-) button.

7. Maintenance

  • Keep the speaker away from water, moisture, and extreme temperatures. The speaker is not waterproof.
  • Clean the speaker with a soft, dry cloth. Do not use abrasive cleaners or solvents.
  • Avoid dropping or subjecting the speaker to strong impacts.
  • When not in use for extended periods, charge the battery at least once every three months to prolong its lifespan.

8. Troubleshooting

ProblemPossible Solution
Speaker does not power on.Ensure the battery is charged. Connect the speaker to a power source using the Type-C cable.
No sound from the speaker.
  • Check if the volume is turned up on both the speaker and the connected device.
  • Ensure the correct input mode (Bluetooth, AUX, USB, TF) is selected.
  • If using Bluetooth, ensure the device is properly paired.
  • If using AUX, check the cable connection.
Bluetooth connection fails.
  • Make sure the speaker is in Bluetooth pairing mode.
  • Ensure the speaker is within the 10-20m wireless range of your device.
  • Forget "SANSUI F81" from your device's Bluetooth list and try pairing again.
  • Restart both the speaker and your Bluetooth device.
FM radio reception is poor.
  • Move the speaker to a location with better signal reception.
  • Ensure no strong electromagnetic interference nearby.
USB/TF card not playing.
  • Ensure the card/drive is inserted correctly.
  • Check if the audio files are in a supported format (APE, FLAC, WAV, MP3).
  • Verify the speaker is in the correct USB/TF card mode.

9. User Tips

  • Portability: The speaker is lightweight (approx. 350g net weight) and features a silicone carrying strap, making it easy to carry for outdoor activities like camping or picnics.
  • Versatile Audio: With its full-range speaker and bass diaphragm, the F81 is suitable for various music genres. Experiment with different audio sources to find your preferred sound.
  • Digital Convenience: Utilize the digital buttons for quick channel tuning on FM radio or direct song selection when playing from USB/TF cards.
  • Battery Life: The 1200mAh battery provides approximately 8 hours of playback at 30% volume, or about 3 hours at 100% volume. Adjust volume to optimize battery usage.
SANSUI F81 speaker outdoors with a tent, showing '8h' for battery life, indicating long-lasting battery for flexible scenarios.
Figure 9: Long-lasting battery life for flexible use.
A woman holding the SANSUI F81 speaker, highlighting its lightweight and portable design with a carrying strap.
Figure 10: Lightweight and portable design.

10. Warranty and Support

For warranty information and customer support, please refer to the documentation provided with your purchase or contact the retailer/manufacturer directly. Keep your proof of purchase for any warranty claims.

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