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User Manual
Wireless Headphone
Transmitter Set
BTHT-4189-BLK
Overview ·
LED indication & voice prompts ··
Turn on HT4189 ···
Use HT4189 with your TV ···
Check your TVs output options before the set up ···
TVs with OPTICAL audio out ··
TV s with AUX 3.5mm Audio Out ··
TVs
Use HT4189 with your AV Receiver with 6.35mm PHONE jack ·
Use HT4189 with your PC/Laptop ··
Use t
Add a 2nd pair of headphones ··
Cl
ear paired history ···
Headphone charging
Tr
oubleshooting ··
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with RCA audio out (Red/White ports labeled “AUDIO OUT” )
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he headphone independently with cellphone
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Overview
Codec indicators
A for AS9S headphone
Bluetooth status
indicator for A
Audio input indicators
B for 2nd headphone
Bluetooth status
indicator for B
LED Indication & Voice Prompts
LED indicators of the transmitter(Audikast)
Status LEDs indication
Pairing with AS9S
Pairing
Pairing with 2nd headphones
ON/OFF
close to A ashes BLUE and RED alternately
close to B ashes BLUE and RED alternately
Connected
Reconnecting
Connected with AS9S
Connected with 2nd
headphones
Reconnect with AS9S
Reconnect with 2nd
headphones
close to A turn SOLID BLUE
close to B turn SOLID BLUE
close to A ashes BLUE once per 2 seconds
close to B ashes BLUE once per 2 seconds
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LED indicators & voice prompts of headphones(AS9S)
Status LEDs indication
Power On
Power O
Pairing
Connected with Audikast
Reconnecting
Charging/charging complete
Low battery RED LED ashes
BLUE LED is on for 1 second
RED LED is on for 2 seconds, then turn o
RED and BLUE LED ashes alternately
BLUE LED ashes once per 2 seconds Connected
RED LED on/o
Turn on HT4189
Voice prompt
Welcome to Avantree
Good bye
Pairing
ConnectedBLUE LED on
NA
Low battery
Powering up transmitter
Powering up the transmitter with the USB cable provided. Connect it either to a TV USB port or any
other USB charger that supports 5V/500mA-2A.
Turn on both devices
Turn on the transmitter – Slide on/o switch to “ON” position, close to A ashes BLUE once per 2
seconds.
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Turn on the headphones – Press and hold for 2 seconds until you see the rst sight of BLUE light.
They will auto-reconnect, indicators are: 1) Headphones say “Connected”. 2) close to A on the transmitter and LED on headphones turn SOLID BLUE.
Connected
Turn SOLID BLUE
Turn SOLID BLUE
Use HT4189 with your TV
Check your TVs output options before the set up
HT4189 works with OPTICAL output, AUX 3.5mm output, and RCA (labeled “AUDIO OUT”) output.
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TVs with OPTICAL audio out
After turning on HT4189 and connecting cables, you should be able to hear sound from your headphones; if not,
• Ensure your TV speaker is set to “External Speaker”.
• Ensure TV audio format is set to “PCM” or “Dolby/DTS” is OFF(This is IMPORTANT)
Note: Setting menu may be dierent depending on dierent TV brands and model.
TV s with AUX 3.5mm Audio Out
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After turning on HT4189 and connecting cables, you should be able to hear sound from your headphones; if not, ensure your TV speaker is set to “Headset”
Note: Setting menu may be dierent depending on dierent TV brands and model.
TVs with RCA audio out(Red/White ports labeled “AUDIO OUT”)
After turning on HT4189 and connecting cables, you should be able to hear sound from your headphones; if not,
• Ensure use TV Red/White ports labeled “AUDIO OUT”, other Red/White ports are incorrect.
• Ensure your TV speaker is set to “External Speaker”.
Note: Setting menu may be dierent depending on dierent TV brands and model.
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Use HT4189 with your AV Receiver with 6.35mm PHONE jack
Notes:
• HT4189 is not compatible with ANY RCA(L/R) ports on your AV Receiver, ONLY use the BIG 6.35mm
PHONE OUT on front side of your AV Receiver with the 6.35mm to 3.5mm adapter.
• Do NOT set the volume of your AV Receiver too high.
• Plug wired ear buds to the port on AV receiver; check whether the sound is normal.
Use HT4189 with your PC/Laptop
The HT4189 transmitter supports Micro USB digital audio input from your PC/Laptop. This delivers
much better audio quality compared to plugging it into the standard 3.5mm AUX analog port.
Connect the transmitter to PC/laptop via the included Micro USB data/charging cable.
Note: The connecting cable must have both DATA SYNC and charging capabilities.
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After turning on HT4189 and connecting cables as above, you should be able to hear sound from your
headphones; If not:
• Set as default "Playback device" on PC/laptop - Right-click the speaker icon in the bottom-right of the
taskbar and select “Playback devices”.
• Set the “Avantree Audikast” as the “Default Device”.
For Skype audio settings, please select “Avantree Audikast” for both Speakers and Microphone.
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Use the headphone independently with cellphone
Headphone AS9S can be separately used with cell phone, please follow the step-by-step instruction
below：
• Ensure the transmitter is o.
• Enter the headphones into PAIRING MODE - from its OFF state, press and hold the MFB for 5 seconds
until the LED ashes RED and BLUE alternately, and you hear “Pairing” from the headphones.
PAIRING
LED ashes RED and BLUE
• Turn on Bluetooth on your smart phone/tablet. Find & select “AS9S” to pair and connect.
Settings
Bluetooth
Devices
Bluetooth
Avantree AS9S
The next time, you want to use your headphones in this way you will need to select “ Avantree AS9S”
on your smart phone /tablet to reconnect.
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Add a 2nd pair of headphones
• Powering up the transmitter, then turn on the HT4189 headphones and transmitter - they will
connect automatically. Now, turn o the headphone.
• Enter the transmitter into PAIRING MODE manually - press and hold B for 2 seconds, close to B
ashes BLUE and RED alternately.
• Place your 2nd headphones into Bluetooth PAIRING MODE (please refer to your 2nd headphones’
user manual).
• Keep the devices close to each other and wait. Once connected, close to B on the transmitter will
turn SOLID BLUE.
• Now turn back on the rst headphone, it should auto reconnect to the transmitter.
Reconnect - Next time, the 2nd headphones will also auto reconnect to the transmitter once turn on.
Otherwise, click B once on the transmitter to initiate the reconnecting and close to B ashes BLUE
once per 2 seconds.
Clear paired history
Clear the paired history of the transmitter
After power on, press and hold BOTH A and B together for 7 seconds, both will be on BLUE for 2
seconds, then A enter pairing mode automatically, close to A ashes RED and BLUE alternately.
Clear the paired history of the headphones
After turning on, press and hold both “+” and “-” for 10 seconds until the RED and BLUE LEDs are BOTH
on for 2 seconds (looks PINK) - now all the paired history of the headphones is cleared. It then enters
pairing mode automatically with the LED ashing alternately RED and BLUE.
Headphone charging
Please charge the headphones if you hear the “low battery” voice prompt. You can charge using a
phone charger (5V/500mA-2A output), PC USB port, TV USB port or any other USB outlet using the
included USB cable. It takes about 3.5 hours to fully charge the headphones. The LED will turn RED
during charging and turn o once charging is complete.
Troubleshooting
https://support.avantree.com/hc/en-us/sections/360000098383-BTHT-4189-BLK
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