HT381 Setup Guide

While listening through HT381, turn the earphone volume wheel slowly to adjust loudness.

To adjust the left/right balance, turn the spinner on the back of the earphones toward your preferred balance.

Done: TV sound is comfortable in both ears.

If not: If one ear is quiet, return the balance toward the middle and check the earphone fit.

While HT381 is on, press the earphone AMBIENT button once to turn on Ambient Mode. The earphone LED turns red and surrounding sound is amplified.

Press AMBIENT again to return to TV listening; the LED turns green.

Done: You can switch between surrounding sound and TV listening.

If not: If the LED is red when you want TV sound, press AMBIENT once. HT381 is not a medical hearing aid.

1. Connect the HT381 dock to power.
2. Place the earphones correctly in the charging cradle.
3. For uninterrupted listening, swap in the spare battery and charge the other battery in the spare-battery charging cradle.

Done: After charging, the earphones can turn on and play TV sound.

If not: Reseat the earphones or battery and check dock power. If they still will not charge, contact Support.

The dock has separate charging indicators for the earphones and spare battery. Refer to the labelled controls below.

Check the batch number on the bottom of the HT381 transmitter before adding earphones.

T24B1 or later: use compatible HT381 earphones. Turn them on, hold AMBIENT for 5 seconds until the LED flashes green rapidly, then hold the transmitter MODE for 5 seconds until its bottom LED flashes green.

Done: The added earphones and transmitter show solid green; confirm TV sound plays through the added earphones.

If not: Keep them close and check the batch. If connection fails, contact Support.

Before T24B1, or batch unknown: contact Support to confirm the matching additional earphones and procedure.

Ordinary Bluetooth headphones cannot pair to this 2.4 GHz transmitter.

HT381 symptom: connection LEDs are solid green, but the TV program is silent. The source, audio format, volume or Ambient Mode may be responsible.

1. Play a program on the device actually connected to the HT381 dock.
2. If the earphone LED is red, press AMBIENT once to return to TV sound.
3. Check AUDIO OUT connections. For Optical, select Optical output + PCM, Dolby off. For AUX, select Headphones and raise TV output volume.
4. Slowly turn up the HT381 earphone volume wheel.

Done: The current TV program plays through the earphones.

If not: If LEDs flash green, use the reconnection steps below. If solid green remains silent, contact Support with your TV model, cable type and settings.

HT381 symptom: the earphones and transmitter do not show solid green. The wireless connection may need restoring.

1. Check the transmitter batch number on its underside.
2. Turn on the HT381 earphones and keep them close to the powered dock.
3. Hold earphone AMBIENT for 5 seconds until its LED flashes green rapidly.

Batch before T24B1: unplug the transmitter power, then plug it back in with the earphones nearby.

Batch T24B1 or later: hold transmitter MODE for 5 seconds, or until the bottom LED flashes green.

Done: Both LEDs turn solid green within a few seconds. Play TV sound to verify audio.

If not: If the batch is unreadable or the LEDs do not become solid green, contact Support. Do not use a Bluetooth pairing menu.

HT381 symptom: no earphone light or sound. The battery may be discharged or charging contact may be incomplete.

1. Power the dock and reseat the earphones in the charging cradle.
2. Check that the battery is fitted correctly; try the charged spare battery.
3. Slide the earphone power switch to ON.

Done: The earphones turn on and reconnect; solid green confirms connection.

If not: If neither battery works after charging, contact Support. Do not force the battery or charging contacts.

HT381 symptom: one side is quiet. The left/right balance may be offset.

1. Turn the left-right balance spinner on the back of the earphones toward the middle.
2. Check the earphone fit and slowly adjust the volume wheel.
3. Play a familiar TV program and compare both ears.

Done: Sound is audible and comfortable in both ears.

If not: If one side stays silent, contact Support and describe whether it happens with every program.

Simultaneous TV-speaker and HT381 sound depends on your TV output and sound settings. A headphone socket or AV receiver connection may mute TV speakers.

Check your TV manual for simultaneous speaker and external audio support. HT381 has no soundbar passthrough.

Done: Both the TV speakers and HT381 play the same program if the TV supports this output combination.

If not: If the TV cannot provide both outputs, contact Support to discuss your TV model and connection options.