ISUZU D-Max 2019-2025 - Full Sound System Upgrade w/ Custom 10” Sub Box & DSP

Volkswagen

2 June

Written By Michael Benda

Original Setup:

Factory Radio
Reverse Camera
6X9 Components in Front
6.5 inch Rear Coaxial Speakers
2 x Roof Surround Speakers

New Setup:

The customer expressed a desire to retain the factory radio while upgrading the entire sound system.

Upgraded Sound System:
- Front Speakers- Eton Pro 16+
- Rear - Alpine Status HDZ65 6.5-inch Coaxial Speakers
- Helix M6-channel DSP Amplifier
- Custom Amplifier Rack (mounted on the rear passenger wall behind the back seats)
- Match 1FX Monoblock Amp
- Custom Subwoofer Enclosure (mounted behind the driver's seat)
Three layers of sound dampening material on all four doors and rear wall behind the back seat
Biplast Sound Dampening to the rear plastics

Parts Used:

Eton Pro 16+
Alpine HDZ65 6.5 inch Coaxial
Eton Nkill Sound Dampening
STP biplast Sound Dampening
Helix M 6 DSP 6ch AMP
Match 1FX Mono Block Amp
OZ Audio 10 inch Custom Sub Box w/ Audio Control Slim Woofer.

Upgrade Details:

These new Isuzu D-Max vehicles come with a factory sound system that’s known for its flat, uninspiring audio profile—and for this customer, that just wasn’t going to cut it. As a passionate music lover, he wanted a system that could deliver loud, clean, and detailed sound, even at high volumes.

To deliver exactly that, we put together a full custom audio package. Up front, we installed 6.5-inch component speakers, which offer the kind of clarity and detail that standard 6x9s simply can’t match. The entire system was run actively through a Helix M 6 DSP, giving us the ability to tune each speaker individually and stage the sound perfectly to the front center—something that’s not possible with the factory head unit alone.

In the rear, we added Alpine Status speakers for mid-bass support and rear fill, rounding out the soundstage beautifully. We also applied sound deadening to all the doors, which made a huge difference in improving speaker clarity and reducing unwanted resonance.

Two amplifiers were neatly mounted on a custom amp rack behind the rear seat, keeping everything clean and tucked away. To top it off, we built a custom 10-inch subwoofer box from OZ Audio, fitted with a high-performance 10” AudioControl subwoofer. It delivers surprisingly deep, punchy bass, fitting neatly behind the rear seat with just minor trimming to the plastic for clearance.

The result? A system that’s tight, loud, and incredibly detailed, transforming the in-car listening experience and making this D-Max a true joy to drive.