What does REM OUT mean on a car stereo?
Today · Category: Wiring By Nick Marchenko, PhD
What does REM OUT mean on a car stereo?
If you’re wondering about the term "REM OUT" on a car stereo, you’re in the right place. This article is for car audio enthusiasts and anyone looking to install or understand their car stereo system better. You’ll learn what REM OUT signifies, its importance, and how to work with it safely.
Short answer
REM OUT, or remote output, on a car stereo is a trigger wire that sends a signal to turn on external amplifiers or other devices when the stereo is powered on. It is essential for coordinating the operation of your audio equipment.
What it means
In simple terms, REM OUT is a wire that connects to your amplifier or powered subwoofer. When you switch on your car stereo, the REM OUT sends a voltage signal, which tells these devices to power up. This makes it easier to manage your car audio system without needing to turn each component on manually.
When it matters
You should care about REM OUT when installing an amplifier or other components in your car audio setup. If you want your amplifier to activate automatically with your stereo, a proper connection to the REM OUT is crucial. It ensures that everything works harmoniously when you start your vehicle.
How to check or decide
To check if your car stereo has a REM OUT, locate the wiring harness that connects to the back of the unit. Look for a wire labeled "REM," "REMOTE," or "REMOTE OUT." Use a multimeter to confirm it produces a voltage (usually around 12V) when the stereo is powered on. If you're unsure about the connections, consult the user manual for your specific stereo model.
Common mistakes
- Not connecting the REM OUT wire: Failing to connect it to your amplifier means your amp won't turn on with the stereo.
- Using incorrect wire gauge: Using too thin of a wire for the REM OUT connection can lead to power loss or damage.
- Ignoring safety precautions: Always disconnect the negative battery terminal before working with your car's electrical system to avoid shorts or shocks.
Cost, compatibility, or safety considerations
When dealing with REM OUT connections, compatibility is key. Ensure your amplifier has a REM IN port that corresponds to the REM OUT from your stereo. The wire gauge should typically match the specifications recommended by your amplifier's manufacturer. Additionally, prioritize safety by using appropriate fuses and avoiding shortcuts during installation. If you're not comfortable working with car electronics, consider hiring a professional installer to ensure everything is connected safely.
Quick comparison table
| Feature | REM OUT | Constant Power |
|---|---|---|
| Function | Turns on external devices with stereo | Powers devices continuously |
| Usage | Amplifiers, powered subwoofers | Always-on devices |
| Voltage | Approximately 12V when activated | 12V constant |
Final recommendation
Understanding what REM OUT means on a car stereo is essential for anyone looking to upgrade or install an audio system. Always ensure proper connections, respect safety protocols, and consult a professional if you're unsure about any part of the installation process. With the right approach, you can enjoy a fully functioning and efficient car audio setup.
FAQ
- What does REM OUT do on a car stereo? It sends a signal to power on external amplifiers or devices when the stereo is turned on.
- Can I use REM OUT to power other devices? Yes, but only devices designed to be triggered by a remote signal, like amplifiers or powered subwoofers.
- What happens if I don’t connect REM OUT? Your amplifier or powered subwoofer will not turn on automatically with your stereo.
- Is it safe to connect REM OUT to multiple devices? Yes, as long as the combined current draw does not exceed the stereo's REM OUT rating.
- How do I know if my REM OUT connection is working? Use a multimeter to check for voltage when the stereo is on.
- Can I install an amplifier without using REM OUT? Yes, but you would need a different method to turn the amplifier on, such as a manual switch.
- What wire gauge should I use for REM OUT? Follow the recommendations from your amplifier’s manufacturer, typically between 18 to 16 gauge.
- Is professional installation necessary for using REM OUT? It's not necessary, but highly recommended for those unfamiliar with car audio wiring.