AV converter SpeaKa Professional 989149 — Toslink (optical) to RCA digital audio adapter

The SpeaKa Professional 989149 AV converter converts digital optical Toslink audio signals to a coaxial RCA digital output. It allows connection of devices that provide an optical audio output—such as TVs, set-top boxes, or media players—to audio equipment that accepts S/PDIF over RCA, including soundbars, DACs, and older AV receivers. The compact housing and single-function design make the adapter suitable for simple signal routing in home AV setups where direct compatibility between optical and coaxial digital interfaces is required.

Advantages

This adapter provides a direct conversion from Toslink (optical) to RCA (coaxial) digital audio without the need for complex configuration. Its compact size and simple single-cable connections reduce clutter and make installation straightforward. The converter supports standard digital audio sampling rates commonly used in consumer electronics and maintains the digital signal path, enabling use with devices that lack optical inputs. Passive indication and durable connectors increase reliability for long-term basic use in home entertainment setups.

Suitable for

• Connecting a TV or media player with Toslink output to an audio system with RCA digital input
• Integrating modern sources into older DACs or AV receivers that only accept coaxial S/PDIF
• Feeding a soundbar or external decoder that requires a coaxial digital signal
• Temporary or permanent setups where compact signal conversion is needed

Key specifications

• Input type: Toslink (optical) digital audio
• Output type: RCA (coaxial) digital audio (S/PDIF)
• Supported sampling rates: standard consumer rates up to typical CD/DVD levels
• Power: passive or externally powered depending on model usage (check device requirements)
• Connector finish: standard optical ferrule and RCA plug for coaxial connection
• Housing: compact form factor for easy placement behind AV furniture

How to use

Connect a Toslink optical cable from the source device's optical output to the converter's Toslink input. Then connect a coaxial digital cable (RCA) from the converter's RCA output to the digital input on the receiving audio device. If the converter requires external power, connect the supplied power adapter before turning on the devices. Select the appropriate digital input on the receiving device and set the source to output digital audio via its optical port. Verify audio format compatibility (PCM or Dolby Digital where supported) and adjust source audio settings if necessary.

Recommendations

Use short, high-quality optical and coaxial cables to reduce the risk of signal loss. When connecting older receivers or DACs, consult the receiving device's manual for supported sampling rates and formats. If no audio is heard, confirm power (if required), check that the source is set to output via Toslink, and try a different cable or input on the audio device.