Choosing a car head unit can feel overwhelming, especially with all the new features, brands, and technical terms thrown around. Whether you’re after a simple upgrade or planning a full sound system build, your head unit is where it all starts.
Let’s break it down so you know exactly what to look for — and what to avoid.
What Is a Car Head Unit?
A Car head Unit is the central control panel of your car’s audio system. It’s the part you interact with — the screen (or buttons) where you play music, answer calls, navigate, or connect your phone. It powers your speakers, links to amplifiers, and ties your system together.
These days, head units go far beyond radio and CDs. Think Bluetooth streaming, Apple CarPlay, Android Auto, built-in navigation, rear-view camera inputs — even full touchscreen multimedia displays.
Single DIN vs Double DIN Head Units
One of the first things to check is your car’s dash opening. Most vehicles support either a Single DIN or Double DIN unit.
- Single DIN units are about 2 inches tall. They’re usually more compact and stick to the basics (radio, Bluetooth, maybe a small screen).
- Double DIN units are double the height and often include large touchscreens with advanced features like CarPlay or Android Auto.
If you’re not sure what your car supports, a quick look at the factory unit or a chat with a car audio installer will give you the answer. And yes — if you’re really keen, 1.5 DIN units exist too, but they’re rare and mostly seen in older vehicles like Ford Falcons or GM models.
Key Features to Consider in Car Head Units
Let’s walk through the features that actually matter and how they’ll impact your day-to-day use.
1. Smartphone Integration
If you want Google Maps on your dash or want to use Spotify without touching your phone, go for a unit with:
- Apple CarPlay
- Android Auto
Both offer voice control, large icons, and safe access to your apps. Wireless versions are now common, but they usually come with a higher price tag.
2. Bluetooth & Hands-Free Calling
This one’s almost non-negotiable. Any modern head unit should support:
- Bluetooth audio streaming
- Hands-free calling with built-in or external mic
- Phonebook access for easy calling
Look for units with stable Bluetooth connectivity and decent mic quality.
3. Media Inputs (USB, AUX, SD)
Consider how you want to play music:
- USB for plugging in phones or USB sticks
- AUX input if you’re old-school with a headphone jack
- SD card slots (less common now)
If you’re planning to hook up a reverse camera or dash cam, make sure the unit supports AV inputs.
Sound Quality & Performance
The head unit sets the tone for your entire system — literally. Here’s what to look for:
Built-In Amplifier Power
Most head units come with a built-in amp, usually rated around 4 x 50W peak. Don’t be fooled by peak numbers, though — what matters is RMS power, which is typically around 18–22W per channel.
Preamp Outputs
If you’re running external amps or subwoofers, you’ll need RCA preouts. Ideally, choose a unit with:
- At least 2V or 4V preouts
- Three channels (front, rear, sub) if you want more control
Digital Signal Processing (DSP)
Higher-end models now come with built-in DSP, allowing you to fine-tune frequencies, time alignment, and sound staging. If you’re serious about audio quality, this is a big win.
Steering Wheel Control & Factory Integration
One thing many people overlook is compatibility with your car’s factory features. If your steering wheel has audio controls, you probably want to keep them. Most head units can support this with the right CANBUS adapter or steering wheel control interface.
Also check if:
- The new unit fits without modifying your dash
- You’ll need a fascia kit to match the factory look
- A wiring harness is available for your make/model
These small details make a huge difference in the final result — both visually and functionally.
Popular Head Unit Brands in Australia
Here’s a quick guide to the trusted brands we regularly install and recommend:
| Brand | Strengths |
|---|---|
| Pioneer | Great UI, reliable, wide range of models |
| Kenwood | Smartphone-friendly, crisp sound quality |
| Alpine | Premium features, excellent tuning options |
| Sony | Clean designs, solid entry-to-mid range units |
| JVC | Budget-friendly, basic features covered |
| Focal / Hertz / Kicker | Often used for speakers & amps, pairs well with head units |
Car Head Unit Installation
Even the best head unit won’t perform well if it’s installed poorly. At Tower Audio, we see this all the time — great gear let down by rushed installs or bad tuning.
When installing a Car head unit, make sure:
- It’s properly wired with the right harness (no dodgy joins)
- Audio settings are tuned to your car and speaker layout
- Firmware is updated (especially for CarPlay or Android Auto)
- Any extra gear like reverse cameras, dash cams, or external amps are integrated cleanly
Audio Tuning
You can spend $1,000 on a head unit, but if it’s not tuned properly, it can sound worse than a $200 setup. We always fine-tune EQ settings, crossover points, and gain levels to make sure your system performs the way it should.
Good tuning brings out the detail in vocals, balances your subwoofer, and ensures nothing sounds harsh — especially on the highway.
Frequently Asked Questions
What is a car head unit?
A car head unit is the main control center for your car’s audio and infotainment system. It handles radio, Bluetooth, navigation, media playback, and phone integration.
What’s the difference between Single DIN and Double DIN?
Single DIN units are around 2 inches tall and are suited for compact dashboards. Double DIN units are taller and can support touchscreen displays with more features.
What features should I look for in a head unit?
Look for Apple CarPlay, Android Auto, Bluetooth, USB/AUX inputs, a built-in amplifier, preamp outputs, and DSP for advanced tuning.
Can I keep my steering wheel audio controls?
Yes, but you’ll usually need a CANBUS adapter or a steering wheel control interface to make it compatible with your new head unit.
Which brands are best in Australia?
Top brands include Pioneer, Kenwood, Alpine, Sony, and JVC. Focal, Hertz, and Kicker are also excellent choices when paired with a full audio system.
Need Help Choosing the Right Unit?
If you’re unsure where to start or just want honest advice, give us a call. We help you choose based on how you use your car — whether it’s daily commutes, weekend road trips, or full-blown sound builds.
📞 Call Tower Audio on (03) 9553 3054
