CSR8675 Bluetooth 5.0 Audio Adapter with Optical Input and Low Latency for Home Theatre

This compact Bluetooth 5.0 audio adapter bridges the gap between your wired home entertainment system and modern wireless audio devices. Designed around the CSR 8675 chipset, it transmits high-fidelity sound from TVs, CD players, and home theatre receivers to Bluetooth speakers or headphones with minimal lag. Its key advantage lies in flexible, live mode switching and dual audio interface support, allowing you to integrate wireless audio without replacing existing equipment. Weighing just 35g and measuring 54mm square, it's a discreet solution for adding wireless capability to any room.

Features and Construction

The adapter's functionality is built on precise hardware and a thoughtful interface layout. It provides multiple connection paths and a user-centric control scheme for seamless integration into various audio setups.

Mode Switching and Controls

A physical switch and dedicated M button allow you to change between TX (transmitter) and RX (receiver) modes while the device is powered on, eliminating the need for a full shutdown and restart cycle. This is a practical advantage over many similar products that require a complete power cycle to switch functions. In TX mode, the adapter streams audio from your wired source to Bluetooth devices; in RX mode, it acts as a receiver, playing audio sent from a Bluetooth-enabled phone or computer.

Connectivity and Audio Interfaces

Dual audio interfaces offer connection flexibility: an optical SPDIF input/output for digital audio signals and separate 3.5mm AUX input and output jacks for analogue connections. This separation of input and output channels provides clearer stereo signal routing compared to combined ports. You can choose between a pure digital optical connection or a standard analogue AUX connection depending on your source equipment's outputs.

Uses and Placement

Its primary role is to modernise fixed audio systems with wireless streaming, suitable for both dedicated home cinema spaces and general living areas. The over-20-metre Bluetooth range allows for considerable placement flexibility.

Home Theatre and TV Audio

Connect the adapter via optical cable to your TV's digital audio output or via AUX to a headphone jack to wirelessly transmit programme audio, movie soundtracks, or music to a Bluetooth soundbar, headphones, or stereo speaker pair. The support for the A2DP and AVRCP Bluetooth protocols ensures broad compatibility with common audio devices. The low latency of under 40ms helps maintain audio-visual sync, which is particularly important for dialogue and on-screen action.

Music Streaming and Multi-Room Audio

Use the adapter in RX mode connected to a traditional stereo amplifier or powered speakers, allowing you to stream music wirelessly from your smartphone or tablet. The dual-pairing capability in TX mode enables a simple multi-speaker setup where two Bluetooth speakers in the same room can play the same audio source simultaneously, effectively widening the soundstage without complex wiring.

Benefits and Buying Value

The adapter delivers value through its dual functionality, high-quality codec support, and elimination of cable clutter, extending the life and utility of existing audio components.

Codec Support and Audio Quality

Support for advanced audio codecs like APT-X, APT-X HD, APT-X Low Latency, AAC, and SBC means the adapter can transmit high-resolution, CD-like quality audio wirelessly when paired with compatible source material and receiving devices. This ensures you benefit from the best possible audio quality your Bluetooth gear can handle, not just a basic compressed signal.

Why Choose This Adapter

This adapter stands out for its instant mode-switching capability and dual-device pairing in TX mode—features that enhance convenience and expand usage scenarios. The inclusion of both optical and separate AUX ports offers more connection options than many single-interface adapters. Its compact size and integrated battery also make it slightly more portable than larger, mains-powered alternatives, suitable for temporary setups or use with portable audio equipment.