EARTHQUAKE BT5.3NC Bluetooth Wireless Transmitter and Receiver Audio Adapter User Manual

: July 4, 2024
: Earthquake

Table of Contents

EARTHQUAKE BT5.3NC Bluetooth Wireless Transmitter and Receiver Audio
Operating Instructions
FAQ
Product Introduction
Key Features
Product Overview
Operating Instructions
Technical Specifications
RX & TX Configurations
Troubleshooting
Technical Support
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EARTHQUAKE BT5.3NC Bluetooth Wireless Transmitter and Receiver Audio

Adapter

EARTHQUAKE-BT5-3NC-Bluetooth-Wireless-Transmitter-and-Receiver-Audio-
Adapter-product

Specifications

Brand: Earthquake Sound Corporation
Model: BT5.3NC
Type: Audio Adapter
Input & Output Connections: 3.5mm AUX Port, USB Type-C 5V Charging Port

Product Overview

The BT5.3NC Audio Adapter by Earthquake Sound Corporation is a versatile device that can function as a Bluetooth receiver (RX mode) or transmitter (TX mode). It features a microphone, multifunction button, Next/Previous Track buttons, and RX/TX Mode Indicators.

Operating Instructions

RX Receiver Mode

Connecting to Mobile Device:

Pairing the Device: Press and hold the multifunction button for a few seconds to turn on the BT5.3NC in RX mode. The blue LED will blink when active.
Playing Audio: Use the included 3.5mm mini jack adapter to connect the BT5.3NC to a speaker or audio player supporting a 3.5mm input. Music from your mobile device can now beplayed through the connected device.
Making Hands-Free Calls: Utilize the built-in microphone for hands-free calls while connected in RX mode.

TX Transmitter Mode

Pairing the Device: Press and hold the multifunction button to enter pairing mode. The red LED will be solid when the connection is successful.
Playing Audio: Transmit audio from the connected device to Bluetooth-enabled receivers or speakers in TX mode.

Bluetooth Auto Reconnect

The BT5.3NC will automatically reconnect to the last paired device within range when powered on.

Auto Shutdown

The device will shut down after 3 minutes of inactivity, preserving battery life.

Charging

The BT5.3NC supports 5V USB-C charging. Ensure the device is powered off while charging. The red LED indicates charging status.

Technical Specifications

Specifications subject to change without notice

FCC ID: 2A7SX-MINIMESERIES

FAQ

Q: Can I use the BT5.3NC with devices that do not have a 3.5mm AUX input?
- A: Yes, you can use a 3.5mm to RCA Y-adapter cable (not included) for devices without a 3.5mm input.
Q: How do I know if the BT5.3NC is fully charged?
- A: While charging, the red LED will be solid red and turn off once fully charged.
Q: What should I do if the BT5.3NC does not automatically reconnect?
- A: Ensure the device you want to reconnect to is within range and try powering the BT5.3NC off and on again.

Earthquake Sound Corporation

2727 McCone Ave.
Hayward, CA 94545. USA
www.earthquakesound.com

Product Introduction

The Earthquake BT5.3NC is a Bluetooth® wireless adapter that supports both receiver and transmitter modes. With its low distortion, low power consumption, low latency, high-fidelity, and stereo operation, this smart wireless adapter is perfect for a broad range of audio applications. Whether you want to stream music from your mobile device to your home speakers, car speakers, MP3/CD player, computer, or other audio equipment, or transfer audio from headphones and speakers to your devices, the Earthquake BT5.3NC offers flexibility and convenience in a compact and portable design.

Key Features

Bluetooth® v5.3
Switchable receiver (RX) and transmitter (TX)
USB Type-C rechargeable battery
Up to 50ft (15m) wireless range
Compact and portable design
6 hours of music playback
Auto shutdown after 3 minutes of inactivity
Auto-reconnect with devices within range
aptX/AAC/SBC/MP3/FastStream support
Built-in noise-cancelling microphone
Support for hands-free calling
Dual connection support
3.5mm AUX IN/OUT

Product Overview

Microphone
3.5mm AUX Port
RX/TX Mode Switch
Multifunction Button
Next Track/Volume +
USB Type-C 5V Charging Port
Previous Track/Volume −
RX/TX Mode Indicators

Operating Instructions

RX Receiver Mode

Connecting your smartphone or mobile device to the BTA5 via Bluetooth in RX Receiver mode:

Pairing the Device

First, long-press the Multifunction Button (4) for 3 seconds to turn on the BT5.3NC. When RX mode is active, the blue LED will blink.
Next, turn on Bluetooth on your device and search for the name “BT5.3NC”.
Finally, select “BT5.3NC” to begin the pairing process.
The voice prompts “Wireless connection successful” and the blue LED will be solid. The pairing is complete.

Playing Audio

Begin by inserting one end of the included 3.5mm mini jack adapter into the AUX port of the BT5.3NC, and the otherend into either a loudspeaker, speaker, car stereo AUXport, or other type of player that supports a 3.5mm input.

You may also utilize a 3.5mm to RCA cable if needed. Once connected, the music on your mobile phone can be played.

Pause/Play: Press the Multifunction Button (4) to pause/ play a song.
Previous Track: Press the Previous Track Button (7) to skip to the previous track.
Next Track: Press the Next Track Button (5) to skip to the next track.
Volume Up or Down: Hold down either the Next Track or Previous Track Buttons to increase or decrease volume.

Making Hands-Free Calls

Redial a Call: While in the connected state, just double-click the Multifunction Button (4) to dial the number you called last.
Answer and Hang Up a Call: If you receive an incoming call while connected, press the Multifunction Button (4) once to answer it and again to hang up and end the call.
Reject a Call: When you don’t want to answer an incoming call, press and hold the Multifunction Button (4) to reject it.

TX Transmitter Mode

Pairing the Device

First, long press the Multifunction Button (4) for 3 seconds to turn the device on. When TX mode is set, the red LED will turn on and blink. This indicates that the BT5.3NC is searching for a connection.
Turn your Bluetooth-enabled device on and make sure it is in pairing mode. If using wireless headphones/earbuds most will have a button on the cradle to initiate pairing mode. This will allow the BT5.3NC to find your headphones/earbuds.
Wait until the connected device indicates that the connection is successful. When pairing is complete, the red LED will be solid.

Playing Audio

Begin by inserting one end of the 3.5mm audio adapter into the BT5.3NC AUX port and the other end into an audio source with a 3.5mm AUX port. You may also utilize a 3.5mm to RCA cable if needed. Press the play button on the connected device to play audio.

Pause/Play: Press the Multifunction Button (4) to pause/play a song.
Previous Track: Previous Track Button (7) does not work.
Next Track: Next Track Button (5) does not work.Volume
Up or Down: Hold down either the Next Track or Previous Track Buttons to increase or decrease volume

Bluetooth Auto Reconnect

When you shut down the BT5.3NC when not in use, the device will automatically reconnect back to the wireless device that it was previously paired to within range.

Auto Shutdown

The BT5.3NC will automatically shut down after 3 minutes when not connected to a device and without buttons being pressed.

Charging BT5.3NC

The BT5.3NC is rechargeable and supports 5V USB-C charging. Only charge the device while it is not powered on. While charging, the red LED will be solid red and turn off once fully charged.

Technical Specifications

Charge Limit Voltage: 5.25V
Charging Current: 300mA
Working Current: 32mA RX, 65mA TX
Shutdown Current: 20uA
Charging Time: 45 min
Working Hours: 6 hrs RX, 4 hrs TX
Battery Capacity: 200mA
Bluetooth Version: v5.3
Wireless Frequency: 2.403–2.480 GHz
Wireless Range: 50 ft (15 m)
Wireless Support: A2DP, AVCTP, AVDTP, AVRCP, HFP, and SPP
Microphone Range: 1.5–6.5 ft (0.5–2 m)

Specifications in this manual are subject to change without notice. Bluetooth® is the property of its respective trademark holder and has no affiliation with Earthquake Sound Corporation

Input & Output Connections

The BT5.3NC Bluetooth receiver/transmitter comes with a 3.5mm male-to-male adapter. If in the event that your audio equipment does not support a 3.5mm AUX input, a 3.5mm to RCA Y-adapter cable (not included) can also be used. Note that the USB Type-C connector on the bottom of the module does no support audio transmission. It is only for charging.

RX & TX Configurations

RX Mode – Home Audio

Check volume levels of your source, BT5.3NC module, and monitor speakers prior to playing audio

RX Mode – Mobile Audio

EARTHQUAKE-BT5-3NC-Bluetooth-Wireless-Transmitter-and-Receiver-Audio-
Adapter-fig-6

Check volume levels of your source, BT5.3NC module, and monitor speakers prior to playing audio.

TX & RX Mode

Home Audio – Active Subwoofer

Check volume levels of your source, BT5.3NC module, and subwoofer prior to playing audio.

Troubleshooting

The BT5.3NC does not connect to a Bluetooth-enabled device

It is advised that you unpair, forget, or clear the pairing list of other Bluetooth-enabled devices that have previously been paired to the BT5.3NC.
Make sure that you have powered on the BT5.3NC\ and that the LED indicator is blinking red for TX mode or blue for RX mode.
Make sure that the device you intend to pair the BT5.3NC with supports A2DP and AVRCP profiles.

Sound from speakers is intermittent

Move your Bluetooth-enabled device closer to the BT5.3NC. Note that the BT5.3NC module is designed to work within ≈ 50ft (15m) range and walls or other obstructions will reduce the range.

No audio coming from stereo speakers

Make sure that the BT5.3NC is powered on and the 3.5mm AUX adapter is properly connected to both the BT5.3NC and your source. Check the volume of all devices being used. Most devices being used will have their own independent volume controls