• Audi S3 Stage 3 — Full Speaker Replacement Sound Upgrade Package
    • Audi S3 Stage 3 — Full Speaker Replacement Sound Upgrade Package

    Audi S3 Stage 3 — Full Speaker Replacement Sound Upgrade Package

    $4,385.00
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    Audi S3 Stage 3 — Full Speaker Replacement Sound Upgrade Package
    Audi S3 Stage 3 — Full Speaker Replacement Sound Upgrade Package
    $4,385.00
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    • Audi S3 Stage 3 — Full Speaker Replacement Sound Upgrade Package
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    Free Shipping

    Free delivery on orders over $100.

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    100% Australian Owned & Run

    Dispatching daily from our local warehouse.

    🛡️

    1-Year Warranty

    Full local support & coverage.

    🔄

    30-Day Free Returns

    Love your new sound or send it back.

    Built for the current Audi S3 Sedan and Sportback with the factory SONOS 3D premium sound system (15 speakers including a subwoofer). Every stage keeps 100% of your factory features while unlocking what the SONOS speaker set is actually capable of.

    Stage 1 — Amplify

    $1,420

    Plug-and-play DSP amp with your factory speakers

    Stage 2 — Add Bass

    $2,370

    Stage 1 + dedicated subwoofer

    This package

    Stage 3 — Full Speaker Replacement

    $4,385

    Stage 1 & 2 + full speaker upgrade

    What's Included

    • Everything in Stage 1 & 2 — DSP amp, harness, boot subwoofer
    • HELIX Ci7 W165FM-S3 — 6.5" Hi-End midbass woofer pair (front)
    • HELIX Ci7 T20FM-SC — 0.75" Hi-End tweeter pair (front)
    • HELIX Ci3 C100.2FM-S3 MK2 — 4" 2-way coaxial speaker pair (rear)

    Package Items

    Self-install, no experience needed. Genuine plug-and-play connectors, no cutting or soldering. Free trim removal tools included where needed, plus full install support. More resources are being developed. Typical install time: 3-5 hours.

    On DSP tuning: your DSP does not come pre-tuned for your vehicle — for the best result, we strongly recommend running our free DSP Tuning Guide with the AMI Tuning Kit — it takes under an hour and uses Audiotec Fischer's own auto-tuning software.

    Not sure which stage suits your S3? See the full upgrade guide or get in touch — we'll help you pick the right level.

    Manuals & Documents
    MATCH UP 4DSP — Owner's Manual (PDF) Download
    HELIX IQ W8-DVC2 — Official Datasheet (PDF) Download
    HELIX Ci7 W165FM-S3 - 6.5" Hi-End Midbass Woofer Pair, FlexMount — Official Datasheet (PDF) Download
    HELIX Ci7 T20FM-SC - 0.75" Hi-End Tweeter Pair, FlexMount — Official Datasheet (PDF) Download
    HELIX Ci3 C100.2FM-S3 MK2 — Official Datasheet (PDF) Download
    Service & Support

    Warranty

    This product is backed by a 12-month limited warranty, covering defects in materials and workmanship under normal use.

    Technical Assistance

    Our dedicated support team is available to assist with product setup, operation guidance, and troubleshooting. Contact us via email or phone for prompt service.

    Documentation & Downloads

    Access essential resources including the user manual, technical specifications, and safety instructions in our online support center.

    Replacement Parts & Accessories

    We offer a full range of genuine replacement parts, including batteries, chargers, and compatible accessories to ensure long-term performance.

    Training & Tutorials

    Browse our library of how-to videos and maintenance tips to get the most out of your cordless drill.
    Installing it yourself?

    Note: please read our DIY Install tips before purchasing. Most of our packages are plug and play and self-installable with no prior experience needed but it's worth knowing what each stage involves first, including trim removal for Stage 3.
    Frequently Asked Questions

    Will installing this package void my vehicle's factory warranty?

    No. Because our kits utilise genuine OEM-spec plug-and-play T-harnesses, there is zero cutting, splicing, or physical modification to your car's original electrical system. It preserves your vehicle's factory wiring entirely.

    Do I need professional audio tuning experience to make it sound good?

    Not at all. Your digital signal processor (DSP) arrives pre-loaded with a custom acoustic sound map engineered specifically for your vehicle's exact cabin dimensions and equipment. It is ready to perform right out of the box.

    What happens if I change my mind or want to sell my car later?

    Every single kit we sell is 100% completely reversible. You can easily unplug our hardware, remove any brackets, and return the car back to stock condition without leaving a trace — perfect for leased vehicles or preserving resale value.

    What is your return policy and warranty coverage?

    We offer a risk-free 30-day return policy for unused items and stand behind our gear with a comprehensive 1-year local Australian warranty on all products.

    Can I still retain my factory steering wheel controls and dash screens?

    Yes. Our system acts as an invisible power upgrade downstream. You retain 100% of your factory features, including steering wheel buttons, reverse cameras, Apple CarPlay, Android Auto, and factory warning chimes.