Optical cable
- Sound Output
- Optical / External Speaker
- Digital Audio Format
- PCM or Stereo
EN
Interactive User Guide · Ensemble Pro / BTHT-5150R
Clear TV dialogue at your own volume.
Connect the transmitter by Optical or AUX, then listen together through the included Auracast headphones at your own comfortable volume.
The headphones join the transmitter's Auracast broadcast—there is no Bluetooth pairing step for normal TV use.
Optical · AUXAuracast · up to 35 hoursStart setup
How do you want to connect?
Choose the option that works best for you.
★ Use the Ensemble Pro transmitter for the lowest-delay TV listening experience.
How the recommended setup works
The transmitter broadcasts your TV sound.
TVYour TVOptical or AUX output
TXEnsemble Pro transmitterReceives and broadcasts TV sound
HPEnsemble Pro headphonesJoins the Auracast broadcast
For normal TV use, do not pair by Bluetooth. A solid orange headphone LED means it has joined the transmitter.
Got it — Start setupRecommended kit setup
Four steps. One clear result.
Follow each step in order. We show what to do, what to look for, and how to fix it.
Step 1
Power the transmitter.
Place it near the TV. Keep the audio cable loose, not stretched.
Connect power
- Connect USB-C to the transmitter.
- Connect USB-A to a 5 V, 500 mA–2 A power source.
✓
Expected: the transmitter turns on. The audio-signal light may blink until the TV sends sound.
No light? Reconnect both cable ends. Then try another USB power source.
Step 2
Choose one TV audio output.
Look at the labels on the back or side of the TV, then choose the matching path.
Using a soundbar? Complete headphone setup first. Ensemble Pro accepts Optical or AUX; it does not accept HDMI directly.
Which TV output do you have?
Tap a connection to reveal its cable, switch position, and next setting.
Connect with Optical
- Remove the protective caps from both cable ends.
- Connect TV OPTICAL / DIGITAL AUDIO OUT to transmitter OPT IN.
- Set the transmitter Input Selector to OPT.
Next: set the TV sound output to Optical/External Speaker and Digital Audio Format to PCM.
Connect with AUX / 3.5 mm
- Connect TV HEADPHONES / AUDIO OUT to transmitter AUX IN.
- Set the transmitter Input Selector to AUX.
- Set TV sound output to Headphones and raise TV volume to a normal level.
Next: play a program with speech; PCM is normally not required for analog AUX.
Step 3
Set the TV audio output.
Use your TV remote. Then match the settings to your cable.
Use your TV remote controlThese settings are changed on the TV—not on the Ensemble Pro transmitter.
Choose the card that matches your cable
3.5 mm cable
- Sound Output
- Headphones
- TV volume
- Raise to a normal level
No PCM setting needed.
Optical:Choose PCM. Dolby, DTS, Bitstream, or Auto may cause silence.
✓
Test it: play a TV program with speaking voices.
Find PCM settings for your TV brand
Step 4
Turn on the headphones.
Keep them near the transmitter.
✓
Success: the LED is solid orange. TV sound plays.
Connect the headphones
- Slide the power switch to ON.
- Wait for solid orange on the headphones.
- Put them on. Raise the headphone volume slowly.
Red + blue flashing? Double-press ⏯, then hold it for 3 seconds. Wait for solid orange.
No sound after resuming playback? Turn the transmitter OFF, then ON again.
TV Bluetooth setup
Connect the headphones directly to a Bluetooth TV.
This bypasses the Ensemble Pro transmitter and may have more delay.
Turn off the transmitter
Start Bluetooth pairing
Hold the power switch at Pair with Phone for 3 seconds until red and blue flash.
Select Ensemble Aura
Open the TV Bluetooth audio list and select Ensemble Aura.
Confirm solid blue
Solid blue means the Bluetooth connection is ready.
Too much lip-sync delay?
Volume and dialogue
Adjust volume in this order.
1. TV and transmitter
- Using AUX? Raise the TV/source volume first.
- Need more volume? Switch Volume Boost to ON (+6 dB).
2. Headphones
- Set volume: raise it slowly.
- Dialogue unclear? Try the Voice Clear EQ setting.
Daily use
Charge the headphones.
Use the powered dock or a USB-C cable.
Power & charging
About 2 hours for a full charge.
- Use the powered dock or USB-C with a 5 V, 1–2.4 A source.
- On the dock, align the charging contacts.
- Solid red means charging; the LED turns off when full.
Not charging? Reseat the headphones or USB-C cable and verify the power source.
Battery reference
Up to 35 hours of playtime. Actual time varies with volume, connection, and use.
Daily use
Use a soundbar and headphones together.
Match the input and output cable.
Private listening
Private Mode is coming soon.
Private Mode uses an encrypted, password-protected Auracast broadcast.
What to expect
The feature is not available yet. Avantree states that this feature will be added through a future DFU update. No updater or firmware page is currently published.
Until then
Use the open Ensemble Pro broadcast for normal TV listening. No action is needed until Avantree publishes an official update.
Quick fixes
Match what you see.
Each fix states the action, expected result, and next step.
⌁Headphones won't join the transmitter
- Confirm the transmitter is on and playing TV audio.
- Keep the headphones close to the transmitter and at least 2 m from Wi-Fi routers or microwaves.
- Double-press ⏯ if the LED is red + blue, then hold ⏯ for 3 seconds until it flashes orange.
- Wait for solid orange.
Expected: solid orange and TV sound. If it still fails, hold + and − together for 5 seconds to reset the headphones, then search again.
🔇Joined, but no TV sound
- Check the cable: use a TV audio OUT port and match the transmitter selector to OPT or AUX.
- Check the transmitter: a solid Audio Signal light means usable TV audio is arriving. If it blinks, correct the cable or TV settings first.
- Check the TV: for Optical choose Optical/External Speaker and set Digital Audio Format to PCM; for AUX choose Headphones and raise TV volume.
- Check volume: raise the TV volume for AUX, then raise the headphone volume and try the Voice Clear EQ setting.
- Restart: turn the transmitter OFF, then ON.
Expected: the Audio Signal light is solid and spoken dialogue plays. Still silent? Reopen Step 2 and follow the matching connection path from the beginning.
⚡No light on transmitter
- Reconnect USB-C at both ends.
- Try a known-working 5 V USB adapter.
- Slide the transmitter switch to OFF, then ON.
If there is still no light, submit a support ticket with a photo of the power connection.
🔋Headphones will not charge
- Confirm the dock has power.
- Align the charging contacts and look for solid red.
- Try USB-C charging directly.
- Allow about 2.5 hours.
In the box
Everything included.
Headphones + transmitter charging dockHDMI is not supported directly. For an HDMI-only TV, use the HAX06 HDMI ARC-to-Optical adapter (sold separately).
Reference
Connections, lights, and official help.
Quick reference
- TV inputs
- Optical or AUX
- Solid orange
- Headphones joined the Auracast broadcast
- Flashing orange
- Searching for an Auracast broadcast
- Solid blue
- Headphones connected by Bluetooth
- Red + blue
- Bluetooth pairing mode
- Charge time
- About 2 hours
- Playtime
- Up to 35 hours
Official resources
STILL NEED HELP?
Get the right help for Ensemble Pro.
Choose Ensemble Pro / BTHT-5150R and include the TV model, Optical or AUX connection, LED pattern, and a clear photo of the TV and transmitter ports.
RECOMMENDEDSubmit an Ensemble Pro support ticketAdd photos or screenshots so the team can see the exact wiring and TV settings.Start support request →
DON'T WANT TO SUBMIT A TICKET?
Talk to a real support agent.
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