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BYD SEALION 7 Dynaudio Reference UPGRADE+ PACKAGE (incl. Subwoofer)
BYD SEALION 7 Dynaudio Reference UPGRADE+ PACKAGE (incl. Subwoofer)
BYD SEALION 7 Dynaudio Reference UPGRADE+ PACKAGE (incl. Subwoofer)
BYD SEALION 7 Dynaudio Reference UPGRADE+ PACKAGE (incl. Subwoofer)
BYD SEALION 7 Dynaudio Reference UPGRADE+ PACKAGE (incl. Subwoofer)

Vendor:OSCA Shop

BYD SEALION 7 Dynaudio Reference UPGRADE+ PACKAGE (incl. Subwoofer)

Sale price$4,199.00Regular price $4,500.00

BYD Sealion 7 Plug-and-Play Pro Audio Upgrade | Goldhorn AB218 DSP Amplifier | Image Dynamics IDQS8 Subwoofer | Native A²B Integration

$4,500.00 including GST

Installation not included.

The BYD Sealion 7 Pro Upgrade Package is our more complete solution for owners who want to take the factory Dynaudio system beyond basic optimisation. Same as our standard package, it uses the Goldhorn AB218 DSP amplifier with direct A²B digital integration to give the system much greater control over timing, equalisation, crossovers and channel levels. It also comes preconfigured with an OSCA-developed all-seat tune, helping improve soundstage height, vocal focus, tonal balance and overall clarity while retaining the factory system and vehicle integration.

What sets the Pro Package apart is the addition of an Image Dynamics IDQS8 dual 4-ohm subwoofer, paired with a custom OSCA-designed Sealion 7 adapter bracket that allows it to integrate cleanly into the factory Dynaudio subwoofer enclosure. This means you get all the staging, clarity and tuning benefits of the standard DSP package, plus a genuine hardware upgrade to the low-frequency section of the system. The result is deeper, tighter and more authoritative bass, giving the overall system more impact and a more complete high-end sound without the need for a separate aftermarket subwoofer enclosure.

What’s Included

  • 1 × Goldhorn AB218 DSP Amplifier
  • 1 × Goldhorn A²B Plug-and-Play Harness – 1.5m: Vehicle-specific integration with the factory digital audio network.
  • 1 × OFC Power Wiring Kit: Includes fuse holder, fuse and terminated power and earth cabling to suit the BYD Sealion 7 and Goldhorn AB218.
  • 1 × AB218 DSPA Mounting Bracket & Fittings: Developed to securely mount the DSP amplifier within the Sealion 7.
  • 1 × Preconfigured DSP Setup: Software supplied preloaded within the DSP amplifier, including an OSCA-developed all-seat audio tune.
  • 1 × BYD-Compatible Interior Trim Clip Pack: Replacement clips supplied to support a clean professional installation.
  • 1 × Image Dynamics IDQS8 Dual 4-Ohm Subwoofer
  • 1 × IDQS8 Subwoofer Adapter Bracket: Designed to install the Image Dynamics subwoofer into the Sealion 7 factory Dynaudio subwoofer enclosure.

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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

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

"WOW, the difference was instantly noticeable, so much clarity, the speakers sound more wholesome, no more mush, just individuality of instruments, vocals and clean, crisp sound."

— Customer

"All in all, this provides a super crisp, clear range of sound, much more depth of bass, clarity in vocals and overall a very pleasurable listening experience"

— Customer

"I didn't think the car would sound this good without a complete rework."

— Customer

"The EV sound upgrade is worth it, I 1000% recommend it."

— Customer

12-MONTH LIMITED WARRANTY APPLIED

Free Shipping on All Orders Within Australia Over $1000

Product details

Key Features
  • Complete Pro System Upgrade: Combines A²B digital integration, DSP amplification, vehicle-specific tuning and an upgraded subwoofer into one complete system.
  • Goldhorn AB218 DSP Control: Provides precise control over timing, equalisation, crossovers and channel levels to properly optimise the factory Dynaudio system.
  • OSCA Preconfigured All-Seat Tune: Supplied with vehicle-specific DSP settings designed to improve soundstage, vocal focus and tonal balance throughout the cabin.
  • Image Dynamics Subwoofer Upgrade: Replaces the factory subwoofer driver for deeper, tighter and more controlled low-frequency performance.
  • Custom Factory Enclosure Integration: Uses an OSCA-designed Sealion 7 adapter bracket to install the IDQS8 into the original Dynaudio subwoofer enclosure.
  • Vehicle-Specific Plug-and-Play Integration: Includes the dedicated A²B harness, power wiring and mounting hardware required for a clean, professional installation.
  • Cohesive System Performance: DSP tuning and upgraded bass work together to deliver a wider soundstage, clearer vocals, better balance and stronger overall impact.
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
  • BYD-compatible replacement interior trim clips included.
Installation Guide / Warranty Info IDQS Subwoofer Owners Manual Goldhorn AB218 Tech Specs

FAQs

Will this upgrade work with the factory sound system?

Yes. OSCA upgrade packages are specifically designed to integrate with the existing OEM audio 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.

⚠️Read Before You Buy

Important Compatibility & Installation Information

  • OSCA EV Audio Upgrade Packages are aftermarket, vehicle-specific integration solutions. They are not tool-free or no-skill accessories.
  • Plug-and-play integration refers to connector-based integration with the factory audio system. Installation may still require interior trim removal, secure equipment mounting, correctly fused 12-volt power and earth connections, cable routing and vehicle-system awareness.
  • Vehicle compatibility is specific to the make, model, variant and factory audio configuration identified in each package listing. OSCA packages are developed and validated for the specified Australian-delivered vehicles and audio systems only.
  • Compatibility with other markets, vehicle configurations, existing audio modifications, replacement speakers or unlisted variants is not confirmed unless approved by OSCA in writing.
  • Professional installation by an authorised Goldhorn dealer or suitably qualified automotive audio technician is strongly recommended. Self-installation should only be attempted by individuals competent in vehicle trim removal, protected 12-volt electrical systems, wiring diagrams and the identification and avoidance of high-voltage and SRS components.
  • Do not attempt self-installation unless you can safely meet all applicable installation requirements.
  • OSCA DSP calibration must not be reset, overwritten or modified by unqualified individuals. Changes to signal routing, gain, crossovers, equalisation, polarity, delay, protective limits, firmware or output allocation may compromise system performance, disable audio functions or damage factory and aftermarket equipment.
  • Manufacturer independence: OSCA EV Audio Upgrade Packages are independent aftermarket solutions and are not manufactured, approved or warranted by the respective vehicle manufacturers or factory audio system suppliers, unless expressly stated otherwise.
  • Please review the full Compatibility, Installation and Warranty Conditions, along with the vehicle-specific product information, before ordering.

Professional Installation Support

Professional installation is strongly recommended for our vehicle-specific audio packages. Old School Car Audio offers a complete installation service for local customers, with our WA workshop specialising in high-end car audio and modern EV integration. For customers elsewhere in Australia, contact our team and we can help connect you with experienced installers who understand modern EV platforms, complex factory audio systems and vehicle-specific DSP integration. 

Speak with our team today or click below to learn more about our workshop. 

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