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BYD SEALION 7 Dynaudio Reference-Level UPGRADE PACKAGE (PNP + A²B Integration)
Car interior with open door showing mechanical components and wiring.
Car interior with audio system wiring and a subwoofer installed.
Car interior with wiring harness and components on a black mat
Car audio amplifier installed in a vehicle's dashboard.

Vendor:OSCA Shop

BYD SEALION 7 Dynaudio Reference-Level UPGRADE PACKAGE (PNP + A²B Integration)

$3,099.00

BYD SEALION 7 Compatible Plug-and-Play Car Audio Upgrade Package | EV Audiophile Sound System | A2B DSP Integration

$3,099.00 including GST
Installation not included.

The BYD Sealion 7 comes equipped with a factory Dynaudio system that provides a strong OEM foundation, but its performance is still limited by factory processing and tuning. The soundstage remains low in the cabin, vocals lack proper height and focus, and the system does not fully deliver the openness, control and tonal balance expected from a genuinely high-end setup.

This plug-and-play package is designed to unlock more from the existing Dynaudio system without replacing the factory speakers or compromising vehicle integration. At its core is the Goldhorn AB218 DSP amplifier, connected directly to the vehicle through a dedicated Goldhorn A²B plug-and-play harness.

Native A²B integration provides direct access to the factory digital audio signal, allowing the system to be processed and tuned with far greater precision than conventional analogue signal pick-up methods. The result is improved soundstage height and width, clearer vocal placement, stronger tonal balance and tighter low-frequency control, while retaining the vehicle’s factory functionality.

What’s Included

  • 1 × Goldhorn AB218 DSP Amplifier
  • 1 × Goldhorn A²B Plug-and-Play Harness 1.5 metres (Vehicle-Specific)

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Ships within 1-2 business days

Standard 12 Month Warranty

Expert Support Available

Unlock the True Potential of the Sealion 7 Dynaudio System

  • Enhanced soundstage elevation and lateral width
  • Improved vocal clarity with precise image focus and placement
  • More consistent and accurate tonal balance across the frequency range
  • Tighter, more controlled low-frequency response with improved definition
  • More stable and refined overall system behaviour

Car interior with open door showing mechanical components and wiring.
Car interior with audio system wiring and a subwoofer installed.

Designed for Seamless Integration, No Compromise

  • Plug-and-play integration architecture
  • No cutting of factory wiring
  • Maintains full OEM functionality
  • Designed for efficient, repeatable installation
  • Pre-configured DSP tuning for the platform
  • No impact on factory warranty

The result is a clean, reversible upgrade that integrates seamlessly and performs consistently... not a workaround or add-on

— OSCA Team

Product details

Key Features
  • Native A²B Integration: Connects directly to the factory digital audio system for a cleaner, more accurate signal.
  • Goldhorn AB218 DSP Amplifier: Combines powerful amplification with advanced tuning control in one compact unit.
  • Plug-and-Play Connection: Uses a vehicle-specific harness for cleaner, faster and more reliable installation.
  • Full DSP Control: Allows precise adjustment of timing, crossovers, equalisation and output levels.
  • Improved Soundstage: Raises and widens the soundstage for a more natural, focused listening experience.
  • Clearer Vocals: Improves vocal placement, definition and separation.
  • Better Tonal Balance: Produces a smoother and more consistent sound across the full frequency range.
  • Tighter Bass Control: Improves bass definition, timing and integration with the rest of the system.
  • OEM Functionality Retained: Maintains the vehicle’s factory controls and core audio features.
  • No Factory Wire Cutting: Integrates without permanently altering the original audio wiring.
  • Reversible Installation: Allows the vehicle to be returned closer to its original configuration.
  • Designed for Professional Tuning: Provides the control needed to achieve the best possible result from the factory Dynaudio system.
System Overview

The Goldhorn AB218 combines multi-channel amplification with advanced digital signal processing, while the dedicated A²B harness provides clean, direct integration with the Sealion 7 factory audio network. Together, they allow the existing Dynaudio system to be tuned as a complete active system rather than relying on generic aftermarket workarounds.

Who This Is For

This package is for Sealion 7 owners who like the car, but know the factory audio leaves too much on the table. If you want a
solution that sounds more refined, more controlled, and more premium (without hacking into the vehicle or losing factory usability) this is the right direction.

Why Choose OSCA EV Packages

Modern EV platforms require a different approach to audio, one that most traditional upgrade methods weren’t designed for. OSCA is among the first in Australia to develop high-end, platform-specific EV audio systems built around proper signal integration, DSP-controlled architecture, and real-world installation requirements. These packages are not adapted from older workflows or generic solutions. They are developed specifically for modern vehicles, with a focus on system behaviour, integration, and consistent performance. As EV platforms continue to evolve, we are actively working at the forefront of how these systems are understood, designed, and implemented.

Installation / Technical Notes
  • Designed for direct integration with factory systems
  • No cutting of factory wiring required
  • Maintains OEM features such as steering wheel controls and integrated vehicle functions
  • Installation is efficient and repeatable due to model-specific design
  • Professional installation recommended for optimal performance
Installation Guide (coming soon) Goldhorn AB218 Tech Specs

Free Shipping on All Orders Within Australia Over $1000

Free Shipping on All Orders Within Australia Over $1000

FAQs

Will this work with the factory Dynaudio system?

Yes. This upgrade is specifically designed to integrate with the existing BYD OEM Dynaudio system using native A2B signal integration.

Do you cut any factory wiring?

No. This is a plug-and-play installation with no factory wire cutting.

Will factory features still work?

Yes. Key built-in functions such as steering wheel controls and active noise cancellation remain operational.

Will this void my warranty?

Because the installation is plug and play and does not require cutting factory wiring, it is designed to avoid the common risks associated with invasive aftermarket installs. For formal warranty interpretation, the final decision always sits with the manufacturer or dealer.

What is the main improvement over stock?

The biggest differences are better soundstage height, clearer vocals, more controlled bass, and a more refined overall presentation. The sound feels less trapped in the doors and more properly placed in the cabin.

Is this just a louder version of the factory system?

No. It will improve output, but the real gain is in control, staging, clarity, and balance. It sounds more complete, not just louder.

How long does installation take?

Installation is relatively fast compared with a conventional custom system because the package is designed for seamless integration (usually no more than 1 day). Exact timing can be confirmed at booking.

Needing Installation Services?

To ensure reliable set-up and accurate performance from our packages, professional installation can be arranged alongside this package. Our dedicated installation team in Perth specialises in high-end car audio systems, ensuring precision installation & technical setup. Speak with our team today or click below to learn more about our workshop.

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Standard 12-Month Warranty

Manufacturer warranty on all products

Expert Support Available

Technical assistance from audio specialists