Summary
Installation and configuration manual for the Infinium BA CT1 Auracast controller and BA T1 transmitter, with placement guidance and specifications.
Key findings
- States a range of up to 100 m (328 ft) in open spaces with the maker's BA R1 receiver, and system latency under 40 ms with that receiver; other receivers may vary.
- Advises mounting transmitters high so the signal does not pass through bodies, centrally in the space, and not close to Wi-Fi access points or other 2.4 GHz devices; it suggests checking for 2.4 GHz interference with an RF scanning tool first.
- Lists Wi-Fi, communication systems, large crowds and building materials (steel, concrete, metallised glass, lift shafts) as factors, and says coverage in a full space will likely differ from an empty one, so coverage should be checked with an audience present where feasible.
- Advises reducing transmit power when many transmitters on different channels share a building, and a lower sample rate in high-interference environments to help avoid dropouts. It notes that hearing aids typically do not support 48 kHz.
- Transmitters can be linked into arrays that share the same broadcast channels, so the maker's receivers move between transmitters by signal strength.
- Under Mounting Tips (printed page 15), the manual says large areas may need several transmitters. Its Transmitter Arrays section (pages 26-27) describes BA R1 receivers moving between array transmitters by signal strength; it does not document this behaviour for hearing aids or phones.
- The controller description and Broadcast Configuration section specify either two independent mono programmes or one stereo programme. Dual mono gives the receiver two choices; stereo uses both channels for one selectable programme.
Limits
Manufacturer guidance without test data. The range figure is for open space with the maker's own receiver, and the specifications list transmit power as programmable without giving its maximum. Revision MAN 297B, copyright 2026.
Read the original
williamsav.com/wp-content/uploads/2025/08/MAN-297B-Infinium-Controller-Transmitter-BA-CT1.pdf
Cited in
- Should the Auracast stream be delayed to line up with the loudspeakers?Open
- How far does one transmitter really reach in a full room?Partly answered
- Which hearing devices can receive which systems?Open
- How do many transmitters share one broadcast across a large venue?Open
- How much do crowds, phones and Wi-Fi reduce reliability?Open
- What commissioning tests and pass limits will the standards require?Open
- Which radio bands can venue FM and RF systems use, and what limits them?Partly answered
- Can one venue offer several Auracast streams at once (languages, audio description, a mix for hearing aids), and how do listeners choose?Partly answered
Cite this source
Williams AV. Infinium system controller and transmitter user manual (MAN 297B). 2026. https://williamsav.com/wp-content/uploads/2025/08/MAN-297B-Infinium-Controller-Transmitter-BA-CT1.pdf (accessed 13 October 2026).
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