Ensemble - Fix Audio Quality Issues – Avantree Support

Ensemble (HT5150) sound too quiet, buzzing, crackling, echoing, or only playing through one ear? Select your problem below and follow the relevant steps.

START HERE — What's the Sound Problem?

Clicking / Buzzing / Static Volume Too Low Crackling / Sound Cutting Out Sound Only on One Side Echo / Double Sound

Clicking, Buzzing or Static

If using an Optical connection, incorrect TV audio format is a common cause.

Open your TV's Settings → Sound / Audio.
Set Sound Output to Optical / Digital Audio Out.
Set Digital Audio Format to PCM / Stereo.
Play a TV program and check the sound.

Important: Use PCM / Stereo, not Auto, Dolby, DTS, Bitstream, or Pass Through.

Find PCM Settings for Your TV Cable Box / Streaming Audio Guide

Volume Too Low

Press Volume + on the headphones several times.
Try another TV channel or video.
Using AUX? Increase the TV volume and make sure it isn't muted.
Using Optical? Check Sound Output and set the digital audio format to PCM / Stereo.

Volume buttons not responding?

Restart the headphones and test Volume + and Volume −. If the controls remain unresponsive, contact Avantree Support .

Crackling or Sound Cutting Out

Was everything working normally before? Try these checks without repeating the entire setup.

Restart the headphones and transmitter, then allow them to reconnect.
Make sure the transmitter has stable power from a working USB wall adapter.
Check that the TV audio cable is securely connected.
Try another Optical or AUX audio cable of the same type.
If using Optical, confirm the TV is set to PCM / Stereo.

Still crackling or sound cutting out?

If the issue continues across different programs after trying another cable, the headphones or transmitter may need inspection.

Sound Only on One Side

If sound only comes from the left or right earcup, follow these checks to determine whether the issue is with the audio connection or the headphones.

Check the audio cable. Make sure the Optical or AUX cable is firmly connected at both ends (TV and transmitter).
Test another audio source. Try another TV channel, streaming device, or compatible audio source to check whether the same earcup remains silent.
Hard reset and reconnect the headphones.
1. Turn on the headphones.
2. Plug a 3.5 mm AUX cable directly into the headphones' AUX port, then unplug it 3-5 times.
3. Press and hold Volume + and Volume − simultaneously to reset the headphones.
4. Pair the headphones with the Ensemble transmitter again using the guide below.
Ensemble Pair & Lock Guide
Try a new audio cable. Replace the existing Optical or AUX cable with another cable of the same type. Connect both ends firmly and test again.

Still No Sound on One Side?

If the same earcup remains silent after completing these checks, the headphones may require further inspection. Contact Avantree Support for assistance.

Echo or Double Sound

An echo may occur when the TV speakers and headphones play together because their audio timing is slightly different.

Mute the TV speakers and listen through the headphones only.
If the echo disappears, check whether your TV has an Audio Delay / Synchronization setting.

Good to Know: Simultaneous TV speaker and headphone audio depends on your TV's capabilities. Some TVs cannot output sound to both at once.

Still Need Help?

Include your Ensemble HT5150 batch number, TV brand and model, connection type (Optical or AUX), the sound problem, and the troubleshooting steps tried.

For one-sided sound problems, mention which earcup is affected, whether the issue occurs with another audio source, and whether the problem started after previously working normally. A short recording is also helpful.

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