The current Audi S3 Sedan and Sportback ship with a premium factory system — the SONOS 3D premium sound system, 15 speakers including a subwoofer. Earlier A3/S3 generations instead ran a Bang & Olufsen system, so always double-check which your specific car has before ordering. It's a great starting point, but it's still bound by an underpowered factory amplifier and generic tuning.
Integrated Audio builds plug-and-play sound upgrade packages specifically for the Audi S3 that unlock what the SONOS speaker set is actually capable of. Add our integrated DSP Amplifier and you'll get rich, detailed sound with dynamics and massively higher output, especially when paired with a subwoofer in Stage 3.
| Stage 1 — Amplify | Stage 2 — Add Bass | Stage 3 — Full Speaker Replacement | |
|---|---|---|---|
| DSP amp & harness | MATCH DSP amp + Audi S3-specific harness | MATCH DSP amp + Audi S3-specific harness | MATCH DSP amp + Audi S3-specific harness |
| Subwoofer | — | HELIX IQ W8-DVC2 — 8" 750W RMS boot subwoofer | HELIX IQ W8-DVC2 — 8" 750W RMS boot subwoofer |
| Speaker upgrade | — | — | Full HELIX Ci3/Ci5 component speaker upgrade |
| Price | $1,420 | $2,370 | $4,385 |
| Self-install time | 1-2 hours | 2-3 hours | 3-5 hours |
| Buy now | Buy now | Buy now |
Why upgrade a factory SONOS-equipped S3?
Even a genuinely good factory system like SONOS 3D is still limited by the amplifier power and generic tuning Audi ships across the whole A3/S3 range. Our packages retain 100% of your factory features while feeding your speakers significantly more clean power and crossover points tailored specifically to the S3 cabin.
_front.jpg)
_interior.jpg)
How each stage improves your Audi S3's sound
If you want to improve the standard sound system of your Audi S3, here's how the three stages work.
Stage 1 — Amplify
- Add a new plug and play DSP amplifier with its own dedicated harness cable — a genuine plug and play car audio upgrade with no cutting or soldering required. Browse the full range of HELIX and MATCH DSP amplifiers we build packages around.
- A massive increase in power over the standard factory amplifier, so your existing SONOS speakers play louder and noticeably cleaner.
- Nothing is removed from your S3 — the new amp integrates with and keeps every standard vehicle sound and function working, including steering wheel controls and Apple CarPlay/Android Auto.
- Built-in DSP (Digital Signal Processor) delivers significantly improved clarity and output, configured specifically for your S3's cabin.
Stage 2 — Add Bass
Stage 2 adds a dedicated boot subwoofer on top of Stage 1, delivering the impactful bass factory speakers were never designed to produce.
Stage 3 — Full Speaker Replacement
Stage 3 is the complete factory speaker upgrade: your standard S3 speakers are replaced with higher quality, higher power-handling HELIX drivers, delivering exceptionally detailed and impactful sound at any volume — the full replacement car audio upgrade path for owners who want the best the platform can do.
Self-install, no experience needed
Every Integrated Audio package uses genuine plug-and-play connectors — no cutting, no soldering. Trim removal tools are included with every package where trim needs to come off, along with full install guides and support.
Questions about which stage suits your S3? Get in touch — we'll help you pick the right level. Or see every vehicle upgrade package we currently offer.