【GZRA 4HD | Tuning Your In-Car Sound with a Compact 4-Channel Power Amplifier】

You want a bit more thickness and punch in the sound from your factory audio, but it’s hard to find space to install a large amplifier. If that sounds like you, GZRA 4HD is a model worth considering.

This power amplifier supports 4-channel setups. Not only can it drive front and rear speakers, but depending on how you connect it, you can also use it as a 3-channel or 2-channel system. Its key feature is that it gives you headroom to drive your speakers properly and lets you change how you use it to match your system configuration.

The unit is compact—229 × 186 × 52 mm (W × D × H). Even if you want to add an amplifier to your vehicle but are concerned about installation space, this size makes it easier to consider as an option. To make it easy to integrate into systems that leverage factory audio, it also supports high-level input and auto turn-on.

The 12 dB crossover supports not only wide-band, but also band-pass. You can adjust the frequency range handled by the speakers and subwoofer based on your combinations. In addition, it includes a bass boost function, making it easy to use when you want to add more low-end presence.

It’s important to think not just about adding an amplifier, but also about which channels to use—and how—to suit your vehicle model, factory system, and speaker configuration. Because the final sound will change depending on the installation method, wiring, and adjustments to gain and the crossover settings, we’ll guide you while organizing what you want to improve in your current system using the GZRA 4HD.

Main Specifications / Performance

【Basic Information】
Product name: GZRA 4HD
Type: 4-channel power amplifier
Supported channels: 4ch / 3ch / 2ch

【Functions】
Crossover: 12 dB
Crossover type: Wide-band / Band-pass
High-level input: Yes
Auto turn-on: Yes
Bass boost function: Yes

【Installation / Size】
Unit size: 229 × 186 × 52 mm (W × D × H)