Step 1
Choose your TV audio OUT
Choose the first available output below.
Which TV output do you have?
Choose your TV connection.
Done
Using a soundbar? Complete headphone setup first. Then connect the matching passthrough output.
TV
→
Transmitter
→
Headphones
HDMI ARC · Optical · AUX
Immersive 3D sound · up to 60 hours
Setup
Get TV sound in 4 steps.
Optical is recommended. Use one connection.
Step 2
Connect Crescendo 3D to the TV
Power the transmitter, then connect the cable selected in Step 1.
Connect power
- Connect USB-C to the transmitter and the included adapter.
- Plug into a wall outlet. Slide power to ON.
Watch: power the transmitter
Connect with Optical
- Remove both protective caps.
- TV OPTICAL OUT → transmitter OPT 1.
- Set SELECT INPUT to OPT/AUX.
Done
Next: choose Optical output and PCM on the TV.
Watch: Optical connection
Connect with HDMI ARC
- Use the TV port labeled HDMI ARC or eARC.
- Connect it to transmitter HDMI ARC 1.
- Set SELECT INPUT to HDMI ARC.
If not
Next: choose HDMI ARC/Receiver, turn eARC off, and select PCM.
Watch: HDMI ARC connection
Connect with AUX / 3.5 mm
- TV HEADPHONES / AUDIO OUT → transmitter AUX 1.
- Set SELECT INPUT to OPT/AUX.
- Raise TV volume.
Done
Next: choose Headphones output. PCM is not required.
Watch: AUX connection
Step 3 of 4 · TV sound
Optical TV settings
Use your TV remote.
- Open Settings → Sound / Audio
- Choose how you want to listen
-
Set Digital Audio Format to
✓PCM or Stereo
See how to set PCM
×Avoid Dolby, DTS, Auto or Bitstream.These may cause silence.
- Open Settings → Sound / Audio
- Set Sound Output to HDMI ARC / Receiver
- Turn eARC OffHow to turn off eARC →
-
Set Digital Audio Format to
✓PCM or Stereo
See how to set PCM
×Avoid Dolby, DTS, Auto or Bitstream.These may cause silence.
HDMI ARC mutes built-in speakers on most TVs.Soundbar + headphones? Use HAX06.How to connect →View HAX06 →
- Set Sound Output to Headphones or Audio Out
-
Raise the TV volume to a normal listening level.
No PCM setting is needed.
- Play a program with speaking voices.The AUDIO INPUT signal light should be solid white.
Step 4
Listen with the headphones
Connect the headphones to the transmitter.
Join the base
- Move the headphone switch to Base.
- Keep the headphones near the transmitter.
- Wait until the LED on the headphones turns solid blue, then raise the volume.
If not
No sound? Recheck the input selector, TV output, playback, and PCM.
Watch: connect to the base
Daily use
Adjust sound, charge, and connect.
Choose a listening mode
Press the EQ button once to switch between:
- Balanced → Natural sound
- Clear Voice → Clearer speech
- Cinema Sound → Immersive 3D audio
Charge the headphones
Use the powered dock or USB-C. Solid red means charging; the light turns off when full (about 2.5 hours).
Watch: charge the headphones
Use headphones with PC / Phone
- Move the headphone switch to Bluetooth.
- Check that the LED flashes red + blue. If it does not, hold ⏯ for 3 seconds.
- On your PC or phone, turn on Bluetooth and select Crescendo 3D.
✓
Connected: the LED turns solid blue.
Watch: pair with a PC or phone
Add More Headphones
The Crescendo transmitter supports unlimited receivers. Add more headphones for family or group listening.
Soundbar passthrough
Use a soundbar and headphones.
Choose the connection that matches your soundbar.
Optical passthrough
Optical connection
- TV OPTICAL OUT → transmitter OPT 1.
- Transmitter OPT 2 → soundbar OPTICAL IN.
- Set SELECT INPUT to OPT/AUX.
HDMI ARC passthrough
HDMI ARC connection
- TV HDMI ARC → transmitter HDMI ARC 1.
- Transmitter HDMI ARC 2 → soundbar HDMI ARC.
- Set SELECT INPUT to HDMI ARC 1+2.
HDMI ARC soundbars only. eARC is not supported.
