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Overflow problem? Get sound out there with a Bluetooth speaker

We hear this often: the main room is full and you need sound in the overflow — without running speaker cable. One simple option is a phone (or tablet) on the RoomCast listening page, paired over Bluetooth to a speaker in that space. Guests can still use earbuds too.

How does the Bluetooth-speaker path work?

1. 1

   Broadcast from the Mac as usual

   Feed the desk or mic into RoomCast and press Broadcast on the venue Wi‑Fi. Same setup as the overflow & parents’ room guide.

2. 2

   Join on a phone in the overflow

   Connect that phone to the same Wi‑Fi, open the listener page (scan the QR), and start playback.

3. 3

   Pair a Bluetooth speaker

   In the phone’s Bluetooth settings, connect a speaker in the overflow area. Phone audio — including the RoomCast browser stream — plays through that speaker so the whole overflow can hear without everyone wearing headsets.

How much delay should I expect?

RoomCast’s delay is usually around half a second, even on busy Wi-Fi, getting audio to the phone browser. Bluetooth to a speaker adds a little more. People in overflow will hear the talk slightly behind the main hall — fine for speech in most events; a poor fit if you need tight sync with a video screen or live musicians they can also see.

• Place the phone close enough to the speaker for a solid Bluetooth link; keep it plugged in.
• Lock the phone screen only if playback keeps running on that device and browser — test before doors open.
• You can mix approaches: a Bluetooth speaker for the room plus earbuds for anyone who wants personal volume.
• About 50 phones on a modern Wi-Fi router can listen at once. The real number depends on the router, other traffic on the network, distance and walls, and the quality setting. A speaker feed still counts as one listener connection.

When should I use cabling or a wired speaker instead?

If the overflow is large, Bluetooth range is awkward, or delay is unacceptable, use a laptop on the listener page with a wired aux into a powered speaker — or see the fuller overflow patterns on the main guide.

What else should I read?

• Overflow, parents’ room and foyer without cabling — the main how-to.
• FAQ: overflow / parents’ room · Latency · Headphones and speakers

More questions? Read the RoomCast FAQ →