EON 3D · AS100-3D

Hear your TV clearly—your way.

Clear dialogue. Immersive 3D sound.Pick a connection. See only the steps you need.

Start Setup Fix a problem

Avantree Eon 3D headphones resting on their charging dock

Bluetooth + Base mode

SETUP

What are you connecting to?

BLUETOOTH TV

Pair Eon 3D directly with your TV.

Put Eon 3D in Bluetooth mode.Slide the switch to Bluetooth.You should see: red and blue flashing.Not flashing? Hold Play/Pause for 3 seconds.

Open the TV's Bluetooth menu.Go to Settings → Sound or Audio → Bluetooth.Start a device scan.Open the TV Bluetooth settings guide →

Select “Eon 3D.”Keep the headphones within 1 m / 3 ft of the TV.Connected: the LED turns solid blue.

Success: TV sound plays through Eon 3D.

TV cannot find Eon 3D? Turn off Bluetooth on nearby phones, confirm red-and-blue flashing, restart the TV scan, and select Eon 3D—not the charging base.

NON-BLUETOOTH TV

Use Eon 3D with a Crescendo transmitter.

Charging base ≠ transmitter

Included charging base: charges Eon 3D only. It does not send TV audio.
Base mode: requires a compatible Crescendo transmitter, sold separately.

Make sure the transmitter is sending TV audio.The Crescendo transmitter must be connected to your TV and broadcasting its sound.Keep Eon 3D close to the transmitter.Open the Crescendo 3D TV connection guide →

Switch Eon 3D to Base.Slide the mode switch to Base.

Start pairing.Hold Play/Pause for 3 seconds.Pairing: red and blue flashing.Connected: solid blue.

Success: you hear the TV through Eon 3D.

Does your base look different? Read the label. If it is only the Eon 3D charging base, it cannot transmit sound; connect directly by TV Bluetooth or add the Crescendo transmitter.

View the compatible transmitter →

PHONE OR COMPUTER

Pair Eon 3D through Bluetooth settings.

Put Eon 3D in Bluetooth mode.Slide the switch to Bluetooth.You should see: red and blue flashing.Not flashing? Hold Play/Pause for 3 seconds.

Select Eon 3D.Open Bluetooth settings on your phone or computer.Choose Eon 3D.

Play audio.Choose Eon 3D as the audio output.Connected: the LED is solid blue.

Success: audio plays through Eon 3D.

Before returning to the TV: disconnect Eon 3D from the phone or temporarily turn off the phone's Bluetooth so it cannot reconnect first.

AFTER SETUP

Choose your sound, then charge.

Choose a listening mode

Press the EQ button once to switch modes.

Balanced → Natural sound
Clear Voice → Clearer speech
Cinema Sound → Immersive 3D audio

EQ button on the right earcup of Eon 3D — Press the highlighted EQ button once to change modes.

Charge the headphones

Use the included charging base or USB-C with a 5 V, 1–2 A power supply.

Charging: solid red
Fully charged: LED off
Charge time: about 2.5 hours
Operating time: up to 20 hours

Charge on the base or directly by USB-C.

Earpad size & fit

Inner: 6.8 × 4.7 × 3.5 cm
Outer: 10.5 × 8.7 cm
Weight: 293 g

Need new earpads or a headband? See replacement parts and guides →

FIX A PROBLEM

Start with what you see.

Each fix identifies the state, the action, the expected result, and the next support path.

My TV cannot find Eon 3D

Recognize: Eon 3D does not appear in the TV's Bluetooth device list.

Confirm the switch is on Bluetooth—not Base.
Hold Play/Pause for 3 seconds until the LED flashes red and blue.
Turn off Bluetooth on nearby phones and move within 1 m / 3 ft of the TV.
Restart the TV's Bluetooth scan.

Expected: Eon 3D appears and the LED becomes solid blue after selection.

If the TV has no Bluetooth audio menu, use a compatible transmitter or contact support.

Eon 3D connects, but there is no TV sound

Recognize: the LED is solid blue but sound stays on the TV speakers.

Open the TV's Sound Output menu and choose Bluetooth headphones / Eon 3D.
Raise both TV output volume and headphone volume.
Disconnect Eon 3D from nearby phones so the TV remains the active source.

Expected: TV audio moves to Eon 3D. Some TVs mute their speakers automatically.

Still silent? Use the official Eon 3D TV troubleshooting article.

The headphones will not connect to the base

Recognize: Base mode keeps flashing and no TV audio is heard.

Check the base label.
If it is the included charging base, stop: it does not transmit audio.
If it is a Crescendo transmitter, turn the transmitter on, switch Eon 3D to Base, then hold Play/Pause for 3 seconds.

Expected: the LED becomes solid blue.

If the models do not match the guide, include photos of both labels in a support request.

The headphones keep reconnecting to my phone

Recognize: the phone connects before the TV, or TV pairing fails after phone use.

Open the phone's Bluetooth settings and disconnect Eon 3D.
Temporarily turn phone Bluetooth off.
Put Eon 3D back in pairing mode, then scan from the TV.

Expected: the TV becomes the active connection and the LED is solid blue.

Charging does not start

Recognize: the LED does not turn solid red on the base or USB-C cable.

Reseat the headphones on the charging contacts.
Try the USB-C cable with a 5 V, 1–2 A power source.
Check the contacts and cable for debris or damage.

Expected: solid red while charging; LED off when fully charged in about 2.5 hours.

If neither method works, contact support.

Can Eon 3D connect to hearing aids?

Compatibility: Eon 3D is an over-ear headphone, not a transmitter or hearing-aid accessory. It connects to a Bluetooth TV, phone, or PC, or to a compatible Crescendo transmitter in Base mode.

It does not pair directly to hearing aids. If you need TV audio sent to hearing aids, ask support for a solution that matches the hearing-aid brand and model.

REFERENCE