BMW 4 Series F36 Audio Upgrade | HiFi S0676 to Premium

BMW 4 Series F36 | HiFi S0676 Speaker System Upgrade with a DSP Amplifier

Model: BMW F36 4 Series Gran Coupe | S0676 HiFi Sound System

The medium-range series of the BMW sound systems on all models up to 2020, the 676 HiFi, is also the one that is the easiest to upgrade. For this purpose, we use a solution that has been developed and produced in Germany by Audiotec Fischer, the world’s leading car-audio manufacturer.

Original Setup:

    • S0676 HiFi sound system factory amplifier
    • 3-way splits in the front:
      • 1″ tweeter
      • 4″ midrange
      • 8″ under-seat subwoofer
    • 2-way coaxial system in the rear:
      • 4″ speaker
    • No dedicated amplifier
    • Low volume output
    • Basic sound quality
BMW 4 Series F36 Audio Upgrade | HiFi S0676 to Premium

All the parts we used have been made to fit BMW so there was no need for any extreme modifications other than undoing a few bolts and putting them all back.

New Setup:

    • MATCH UP 7BMW – PnP DSP amplifier
    • STEG BM45C – Direct fit speakers in the front
    • STEG BM8 – Drop-in underseat subwoofers
    • StP Aero – Premium soundproofing system
    • Custom-tuned stage
    • Loudness, clarity

We have replaced the factory amplifier for MATCH UP 7BMW that fits in directly, the matching harness comes with the amplifier. It was followed with the same style replacement of the speakers and the under-seat subwoofers.

All car doors have been soundproofed and after the whole setup was active and ready, we went onto the tuning part – this is one of the key factors in each audio installation and is usually the reason even DYI fanatics seek professional installation experts for car audio.

For the new speakers and under-seat subwoofers, we’ve used the brand STEG. STEG is a high-quality Italian brand that has great components with a very flat frequency response to begin with. They sound very natural and pleasant to the ear, perfect for everyday use.


This setup is suitable for all BMW models with the 676 HiFi system all up to the year 2020. Please contact us to check the compatibility with your vehicle.


Dynamic sound, clear tones and a great bass frequency response.

The stage has been precisely tuned up with the sound image oriented for the driver’s seat. That way it’s a much more enjoyable experience to drive the car around.

Installation time: 1 day. Please feel free to subscribe to our Youtube channel (Soundtech) for more content.

If you own a BMW 4 Series and are unhappy with the sound quality produced by its stereo system, be sure to get in touch with us on (02) 9055 7400 or to see how we can help.

Customers Reviews & Comments

Installation Photos

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