Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Alpine UTE-73BT In-Dash Digital Media Receiver and Alpine S2-S65 6.5-inch Coaxial Car Speakers. Please read this manual thoroughly before use to ensure proper setup and optimal performance.
Safety Information
- Always consult a professional for installation if you are unsure about any steps.
- Disconnect the vehicle's negative battery terminal before beginning installation to prevent electrical shorts.
- Ensure all wiring is properly insulated and secured to prevent damage or interference.
- Do not operate the unit in a manner that distracts you from driving.
- Avoid exposing the unit to moisture or extreme temperatures.
Package Contents
Verify that all items are present in your package:
- Alpine UTE-73BT Digital Media Receiver
- Two (2) Pairs of Alpine S2-S65 6.5" Coaxial Car Speakers
- Wiring Harness
- Mounting Hardware
- Owner's Manual (this document)
Setup and Installation
1. Alpine UTE-73BT Digital Media Receiver Installation
Mounting the Receiver: The UTE-73BT is designed for standard single-DIN dash openings. Secure the mounting sleeve into the dash opening, then slide the receiver into the sleeve until it locks into place.

Image: Alpine UTE-73BT receiver chassis with the detachable faceplate removed, showing the main unit and its internal components.
Wiring Connections: Connect the included wiring harness to the vehicle's power, ground, accessory, and speaker wires. Refer to your vehicle's wiring diagram for specific wire colors and functions. Ensure all connections are secure and properly insulated.

Image: Rear panel of the Alpine UTE-73BT receiver, displaying various connection ports including RCA outputs for front, rear, and subwoofer, antenna input, and the main wiring harness connector.
- Power (Yellow): Connect to constant 12V power.
- Accessory (Red): Connect to switched 12V power.
- Ground (Black): Connect to a clean chassis ground point.
- Speaker Outputs: Connect to the positive and negative terminals of your speakers.
- Antenna: Connect your vehicle's antenna cable.
- RCA Outputs: For connecting external amplifiers (Front, Rear, Subwoofer).
2. Alpine S2-S65 Coaxial Car Speakers Installation
The S2-S65 speakers are designed for easy replacement of factory 6.5-inch speakers. Ensure proper fitment in your vehicle's speaker locations.
- Remove existing speakers carefully.
- Connect the speaker wires from the UTE-73BT (or external amplifier) to the corresponding positive (+) and negative (-) terminals on the S2-S65 speakers.
- Mount the speakers securely using the provided hardware. Avoid overtightening.
Operating Instructions
Basic Controls

Image: Front panel of the Alpine UTE-73BT digital media receiver, showing the main rotary knob, source button, Bluetooth button, and LCD display with blue illumination.
- Power On/Off: Press the SOURCE button briefly to turn on. Press and hold to turn off.
- Volume Control: Rotate the large central knob to adjust volume.
- Source Selection: Press the SOURCE button repeatedly to cycle through available sources (Tuner, USB, Bluetooth Audio, AUX).
- Menu/Setup: Press the SETUP button to access system settings. Use the rotary knob to navigate and select.
Bluetooth Pairing and Operation

Image: Close-up of the Alpine UTE-73BT receiver's LCD display, clearly showing "BLUETOOTH" text and associated icons, indicating active Bluetooth mode.
- Ensure Bluetooth is enabled on your mobile device.
- On the UTE-73BT, select the Bluetooth source.
- On your mobile device, search for available Bluetooth devices and select "UTE-73BT".
- Confirm the pairing code if prompted.
- Once paired, you can stream audio or make/receive calls through the receiver.
Audio Settings
- Equalizer: Access the equalizer settings via the SETUP menu to adjust bass, treble, and other audio frequencies.
- Bass Engine SQ: This feature optimizes bass response. Adjust levels through the audio settings.
- Subwoofer Control: If a subwoofer is connected, adjust its output level and crossover frequency in the audio settings.
Maintenance
- Cleaning the Unit: Use a soft, dry cloth to wipe the faceplate and display. Do not use abrasive cleaners or solvents.
- Speaker Care: Keep speakers free from dust and debris. Avoid touching the speaker cones.
- Fuse Replacement: If the unit does not power on, check the fuse located at the rear of the receiver. Replace with a fuse of the same rating (10A).
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Blown fuse; incorrect wiring; vehicle battery low. | Check and replace fuse; verify power and ground connections; check vehicle battery. |
| No sound from speakers | Incorrect speaker wiring; volume too low; mute function active; incorrect source selected. | Check speaker connections; increase volume; deactivate mute; select correct audio source. |
| Bluetooth not connecting | Bluetooth not enabled on device; device not in pairing mode; interference. | Ensure Bluetooth is on and discoverable; try re-pairing; move device closer to receiver. |
| USB playback issues | Unsupported file format; corrupted USB drive; drive not properly inserted. | Ensure files are in supported formats (e.g., FLAC, MP3, WMA); try a different USB drive; reinsert USB drive. |
Specifications
| Feature | Specification |
|---|---|
| Model Numbers | UTE-73BT (Receiver), S2-S65 (Speakers) |
| Connectivity | Bluetooth, USB, Auxiliary (3.5mm Jack) |
| Supported Audio Formats | FLAC, MP3, WMA |
| Output Power (Receiver) | 160 Watts (Peak) |
| Speaker Type | 6.5" Coaxial, 2-Way |
| Speaker Peak Power | 480 Watts (per pair) |
| Speaker RMS Power | 160 Watts (per pair) |
| Special Features | Equalizer, Pandora Control, Bass Engine SQ |
Warranty Information
Alpine products are covered by a manufacturer's limited warranty. The specific terms and duration of the warranty may vary by region and product. Please retain your proof of purchase for warranty claims. For detailed warranty information, refer to the warranty card included with your product or visit the official Alpine website.
Customer Support
If you encounter any issues not covered in this manual or require further assistance, please contact Alpine customer support. Contact information can typically be found on the official Alpine website or in the documentation included with your product.







