Application of Long-Distance Wireless Audio Transmission Modules in Wireless Speakers

Wireless speakers, with their advantages in transmission range, ease of use, and stylish design, are gradually replacing traditional wired speakers. As wireless technology continues to advance, users are demanding higher performance in terms of sound quality, latency control, and connection stability. This trend has driven continuous upgrades in the performance and functionality of wireless audio modules. In response to these needs, NiceRF has launched the SA3x6 series wireless audio modules, providing a high-fidelity, low-latency, and long-range audio transmission solution for wireless speakers.

The solution consists of the SA356-TX transmitter module and the SA326-RX receiver module, supporting a high sampling rate of 48 kHz and latency of less than 3 ms. It features a simple installation and connection method, making it suitable for a variety of wireless audio application scenarios.

Typical application example:

• Transmitter (SA356-TX): Connects to the audio input source (MP3 player, Line-in, or microphone input)
• Receiver (SA326-RX): Connects to the speaker to achieve wireless high-fidelity audio transmission

The SA316-TX transmitter module in this wireless speaker solution can connect to an audio input (MP3), either through line-in or microphone input. The SA326-RX receiver module connects to the speaker, enabling easy wireless audio transmission. With a 48 kHz sampling rate and ultra-low latency of 3 ms, this solution ensures high-quality audio transmission. It is also suitable for long-distance audio transmission. Operation is simple—transmission power and volume can be adjusted via buttons to suit different application environments, and users can view the adjusted parameters directly on the screen.

Key features of this wireless speaker solution:

• 40 adjustable channels, allowing multiple sets of devices to operate simultaneously
• 5 W transmission power, with a maximum range of up to 3 km in open areas
• One-to-many mode: a single transmitter can be paired with multiple receivers, with no limit on the number of receivers
• Low latency: less than 3 ms from audio or microphone input to audio output

In addition to the standard SA356 transmitter and SA326 receiver application boards, customers can also choose our SA316S / SA316F30 + SA316S-RX audio modules for direct integration into their own PCB designs, enabling more flexible product development.

The SA316 series modules support external PCM/I²S dual-mode digital audio interfaces and provide a standardized serial interface, allowing users to easily set transmission frequency, volume, microphone gain, and other parameters via serial commands.

It is worth noting that the SA356 and SA326 application boards are developed based on the SA316S (amplified to 5 W) + SA316S-RX modules. Therefore, whether choosing the application boards or the modules, users can expect the same audio transmission performance and functional features.

Performance parameters of the SA316 series wireless audio modules:
UHF band: 868 MHz, 500–980 MHz; VHF band: 160–270 MHz
Transmission rate: 204.8 Ksps; Digital modulation: π/4 DQPSK
Frequency response: 20 Hz–20 kHz; Occupied bandwidth: < 300 kHz
Receiving sensitivity: –96 dBm; Audio SNR: 96 dB; Sampling rate: 48 kHz

The NiceRF SA3x6 series wireless audio modules, with advantages such as low latency, long transmission distance, and one-to-many transmission capability, are well-suited for various wireless speaker and wireless audio transmission applications. In addition to standard products, we also offer customized solutions and support for multiple international product certifications, helping customers quickly enter global markets.

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