The LE Audio Auracast broadcast speaker solution is built on the new LE Audio architecture: one transmitter streams the same audio to an unlimited number of Auracast receivers, and listeners join with a scan or a button press, no pairing needed. The reference design is based on the Mountain View BP15 series pure Bluetooth Auracast broadcast + PA/LNA architecture, with dual transmitter and receiver modes. LC3 coding delivers better quality than legacy SBC at the same bitrate while cutting power draw. Datasheets are available in our download center.
Core Specifications
| Model | LW-AC-Bcast |
| Radio standard | Bluetooth 5.4 LE Audio Auracast |
| Audio coding | LC3 / AAC / SBC |
| Broadcast mode | One-to-many (unlimited receivers) |
| Operating modes | Transmit (Broadcast) / Receive (Scan-to-join) |
| Audio latency | About 100-150ms (LC3 broadcast) |
| Input interfaces | 3.5mm / RCA / optical / USB |
| Amplifier | Built-in PA, external LNA optional |
| Power supply | DC 5V / 12V |
| Range | About 30m line of sight (2.4G coexistence managed) |
| Controls | Buttons + LED indicators, IR remote optional |
| Operating temperature | -10°C to +60°C |
| Certification | CE(RED) / FCC / RoHS compliant |
Key Highlights
- One-to-many broadcast：One transmitter covers every receiver; adding listeners costs nothing, ideal for rolling crowds
- Scan-to-join：Receivers join with a QR scan or one button, near-zero user friction
- LC3 efficient coding：Better quality than SBC at the same bitrate, longer receiver battery life
- Dual TX/RX modes：The same PCBA firmware configures as broadcast source or receiver, one design covers both products
- Proven reference design：Based on the mass-produced BP15 series Auracast broadcast + PA/LNA architecture, datasheets open for download
Applications
- Silent gym classes (multiple groups, same site)
- Classroom and exam listening support
- Multilingual venue tours and simultaneous interpretation
- Waiting-area broadcast at airports and stations
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