This guide covers the physical installation of your WTH (Wireless Temperature Hub): mounting the hub, wiring vehicle power, attaching the antenna, and connecting your temperature sensors. Set aside time to plan your cable routing before you start, since clean sensor readings depend on keeping the sensor cables away from your amplifier and power wiring.
What You Need
Before you begin, gather the following:
- Your WTH hub with its 3-position power connector and screw-on antenna
- The sensors you plan to monitor: one or more WTH Infrared Sensors for non-contact readings, one or more Thermocouple Temperature Probes for contact readings, or a mix of both (the hub supports up to 8 sensors total: 4 infrared plus 4 probe)
- A switched 9 V to 18 V DC power source and access to your system's remote turn-on wire
- An inline fuse holder and fuse for the power lead
- Basic hand tools for mounting and wiring, plus zip ties or clips to secure cable runs
Mounting the Hub
The WTH has a color touchscreen on the front, so choose a spot where the screen is easy to see and comfortable to reach. You will navigate the dashboard and menus by touch, so leave room for your hand.
When picking a location:
- Visibility and reach: mount the hub where you can read the display at a glance and tap the screen without stretching.
- Keep sensor cables away from power: plan the install so your sensor cables can run separately from amplifier power leads, speaker wiring, and other high-current lines. Running a sensor cable alongside power wiring can introduce electrical noise and disturb temperature readings.
- Airflow and heat: mount the hub itself in a spot with reasonable airflow, not buried against a hot amplifier or exhaust component. The sensors are what you aim at the heat, not the hub.
- Antenna clearance: leave space beside or above the hub for the antenna to point up into the open, away from large metal panels.
Secure the hub so it cannot shift or rattle while driving. Confirm the screen faces you at a readable angle before you commit to the final position.
Wiring Power
The WTH draws power through a 3-position pluggable terminal block. The connector unplugs from the hub, which makes it easier to land your wires on a bench before seating it back into place.
The three positions are:
| Position | Connect To | Purpose |
|---|---|---|
| +12V | A switched 9 V to 18 V DC source, through an inline fuse | Main power for the hub |
| Remote turn-on | Your head unit's remote or accessory output | Powers the hub on and off with the rest of your audio system |
| Ground | A clean chassis ground | The negative reference for the hub |
To wire the hub:
- Unplug the 3-position terminal block from the hub and identify each position (+12V, remote turn-on, and ground) by the printed labels.
- Run your +12V lead from a 9 V to 18 V DC source and install an inline fuse on that lead, as close to the power source as practical. Land the fused +12V lead on the +12V position.
- Connect the remote turn-on position to your head unit's remote or accessory output, the same trigger that switches your amplifiers on. This lets the hub power up and shut down with your system.
- Connect the ground position to a clean chassis ground point.
- Double-check that each wire is on the correct position, then seat the terminal block firmly back into the hub.
The hub is reverse-polarity protected and internally fused, so a brief wiring mistake will not immediately damage it. Treat that as a safety net, not a substitute for correct wiring: always confirm your +12V and ground are on the right positions before applying power.
Do not exceed 18 V DC on the +12V position. The hub is designed for a 9 V to 18 V vehicle electrical system. Applying more than 18 V can damage it and is not covered by warranty.
Size the inline fuse for the wire you run, and place it as close to the battery or distribution block as you can. This protects the cable so a short cannot dump the battery or start a fire. The remote turn-on lead follows your amplifier remote circuit and does not need its own fuse.
Connecting the Antenna
The WTH uses an external screw-on 2.4 GHz antenna for its wireless connection to the AuralSync app and to LF Audio wireless displays.
- Thread the antenna onto the connector on the hub and hand-tighten it. Do not over-torque it.
- Position the antenna so it stands up into open space, away from large metal surfaces, dense wiring bundles, and the amplifier chassis.
Keeping the antenna in the clear gives you the strongest, most reliable wireless link. If a paired display later shows a weak signal, repositioning the antenna is the first thing to try.
Connecting Sensors
The WTH reads two kinds of sensors, and both simply plug in: there is nothing to pair. A channel appears on the dashboard as soon as its sensor is connected and reading.
- Plug each WTH Infrared Sensor into one of the infrared sensor ports on the hub. Aim the sensor head at the hot surface you want to watch, such as a subwoofer motor or voice-coil area, without touching it.
- Plug each Thermocouple Temperature Probe into one of the probe jacks. Attach the probe tip to the surface or terminal you want to monitor.
- Route the infrared sensor's shielded cable away from amplifier power and speaker wiring for the cleanest readings. Secure all sensor cables with clips or zip ties so nothing rubs or rattles.
The infrared sensors read temperature without contact, so aim them at the target from a short distance. The probes read by contact, so they need to physically touch the surface or terminal. For guidance on which sensor suits each measurement, how many of each the hub supports, and how channels are numbered, see Sensors and Probes.
First Power-On
With power wired, the antenna attached, and at least one sensor connected, you are ready for the first power-on.
- Trigger your remote turn-on (or switch on the accessory circuit) so the hub receives power.
- The status LED lights and the hub shows a brief "WTH / Wireless Temperature Hub" splash screen.
- The hub then runs a guided 9-point touch calibration. Tap each target as it appears so the touchscreen tracks your taps accurately. You can re-run this calibration later from the settings if needed.
- Once calibration finishes, the "TEMPERATURES" dashboard appears. A channel tile shows up for each connected sensor as soon as it starts reading. If nothing is connected yet, the hub displays "No sensors connected".
With the hub powered up and reading, continue to First Boot and Pairing to connect the AuralSync app and pair any wireless displays.