Bluetooth 5.1 Audio Receiver Decoder Board 5-35V DC USB Sound Card 3.5mm Stereo Output

Product Overview

Upgrade speakers, amplifiers, and DIY audio systems with this compact Bluetooth 5.1 audio receiver and decoder board. It supports Bluetooth wireless audio reception as well as USB computer audio operation and provides both a standard 3.5mm stereo output and a 3-pin audio output connector.

With a wide DC 5–35V input range, reverse-polarity protection, onboard Bluetooth antenna, and optional external 2.4GHz antenna connection, this module is suitable for upgrading older speakers, amplifiers, powered audio systems, and custom DIY electronics projects.

Key Features

• Bluetooth 5.1 wireless audio receiver
• Bluetooth device name: LQSC_BT
• Wide DC 5–35V operating voltage
• USB Type-C 5V power connection
• USB computer sound card functionality
• 3.5mm stereo audio output
• XH2.54 3-pin stereo audio output
• Onboard Bluetooth antenna
• External 2.4GHz antenna connection
• Dual audio output options
• Reverse-polarity power protection
• Full surface-mount component design
• Compact size for DIY installations
• Suitable for installation inside amplifier or speaker enclosures

Technical Specifications

Product Type: Bluetooth 5.1 Audio Receiver / Decoder Module

Model: BT-V5

Bluetooth Version: 5.1

Bluetooth Device Name: LQSC_BT

Input Voltage: DC 5–35V

USB Power Input: USB Type-C 5V

Audio Outputs:

• 3.5mm stereo audio jack
• XH2.54 3-pin stereo output

Signal-to-Noise Specification: Approx. -95 dB

THD: 0.05%

Operating Temperature: -40°C to +85°C

PCB Dimensions: Approx. 55.12 × 32.26 mm

Overall Height: Approx. 12 mm

Mounting Hole Spacing: Approx. 48.26 × 25.4 mm

Mounting Hole Size: M3

Board Weight: Approx. 10 g

Supported Audio Formats

The module supports common digital audio formats including:

• MP3
• AAC
• FLAC
• APE
• WMA
• WAV

Bluetooth LED Indicator

Fast flashing: Waiting for Bluetooth connection

Slow flashing: Audio is playing

Solid light: Bluetooth device connected

Audio Connections

The board provides two convenient stereo audio output methods:

• 3.5mm stereo jack for standard audio cables
• 3-pin L/G/R connector for internal wiring in DIY audio systems

This makes the module suitable for both external audio connections and installation inside speaker or amplifier enclosures.

Power Supply Options

The module can be powered using:

• USB Type-C 5V
• External DC 5–35V power input

The external DC terminal includes clearly marked positive and negative connections.

Important: Please verify polarity before applying external DC power.

Antenna Options

The module includes an onboard Bluetooth antenna for normal use.

For installations inside a metal enclosure or other environments where wireless reception may be reduced, an external 2.4GHz antenna can be connected through the dedicated antenna connector.

The external antenna is sold separately unless included in the selected option.

Applications

Ideal for:

• DIY Bluetooth speaker projects
• Older speaker Bluetooth upgrades
• Amplifier Bluetooth upgrades
• Home audio systems
• Powered speakers
• DIY amplifier projects
• Computer audio applications
• Custom audio electronics
• Audio repair and modification projects

Package Options

Depending on the selected configuration, available options may include:

• Bluetooth 5.1 Decoder Board Only
• Bluetooth 5.1 Decoder Board + 3-Pin Audio Cable
• Bluetooth 5.1 Decoder Board + Acrylic Enclosure
• Bluetooth 5.1 Decoder Board + 3-Pin Audio Cable + Acrylic Enclosure
• Acrylic Enclosure Only – Decoder Board Not Included
• External 2.4GHz Antenna Only – Decoder Board Not Included

Acrylic Enclosure Dimensions

For configurations supplied with the optional acrylic enclosure:

Approx. Size: 62.1 × 38.4 × 29.6 mm

The acrylic enclosure is supplied as separate panels and hardware and requires assembly.

Important Notes

• This product is an audio receiver/decoder module and does not provide speaker-level power amplification by itself.
• An amplifier is required if connecting the module to passive speakers.
• The external antenna and acrylic enclosure are included only with the corresponding selected options.
• Please verify the selected configuration before ordering.
• Specifications may have minor production tolerances.