BMW S676 Hifi System Upgrade

STEG Package

A Plug&Play setup developed specifically for BMW. It is a quick installation that does not interfere with the stock system, improves sound clarity, sound quality, adds really powerful bass and will allow for the whole system to be tuned up to your taste. It brings the music to life.

STEG is an Italian brand with great speakers and subwoofers really making a big difference between a stock stereo system and the upgraded setup.

BMW S676 Hifi Sound System Upgrade

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Package price $3,260



MATCH UP 7BMW 1290W 7/8ch amplifier with a DSP
STEG BMW PnP 4″ component speaker system
STEG 200W 2x 8″ Under-seat subwoofer
– All parts supplied and installed
– Custom sound tuning to your preferences
– 7 Day money-back guarantee


Most BMWs come equipped with the S676 HiFi sound system. It consists of a 4″ component speaker system both in the front and rear doors, two 8″ under-seat subwoofers and a centre speaker in the dashboard. The whole system is powered by a factory amplifier. If you are not sure which version your BMW has, get in touch with us and we will figure it out for you.

Note: In most BMW 1 and 2 series, the Harman Kardon version is built on the S676 Hifi system base as well.


The STEG package combines great German technology with high detail Italian sound quality.

We will replace all front speakers (4 drivers), the 2 under-seat subwoofers and the factory amplifier.

The STEG speakers and subwoofers are made by the Italian GT Trading. The built-in quality and the sound difference between the original drivers and STEG is massive. The speakers have a softer, warmer tone with a lot of detail in the music which isn’t really audible in the stock stereo speakers. (For the sharper sound enthusiast we recommend our package with MUSWAY speakers).

The factory amplifier, located conveniently in the boot, will get replaced with an electronic masterpiece; MATCH UP 7BMW, a 7 channel digital amplifier designed specifically for the BMW S676 HiFi systems. This nearly 1300W unit is very easy to install and it comes with a matching BMW harness, making the whole assembly Plug n Play without any modifications needed.

The UP 7BMW has an inbuilt 8-channel digital signal processor, which makes this upgrade stand out from a regular amplification by far. We will use a dedicated software developed along with this device to sound tune it to your liking. This way we can maximize the speaker’s capabilities, make sure there are no distortions across the whole volume range, the speakers aren’t overdriven and everything is well-balanced. Furthermore, we will adjust the system as per your own taste as we’ll listen to your music with you.

The entire installation can be easily achieved within 1 day.


Soundtech will provide professional consulting on your new audio upgrade, help you to select the best option and install the whole sound system. Then we will tune it specifically for your vehicle. The final part of the sound tuning process is to adjust the system to your own taste as we listen to your music in the vehicle.


The package will be installed as a Plug&Play system with a specific car-matching harness for your car. This harness is made in such a way that it is simply plugged into your current car radio connectors and can be unplugged at any time again. There will be no permanent impacts left on your vehicle.


This package is suitable for all BMW with the S676 HiFi sound systems and most BMW with Harman Karond of series 1 a 2, manufactured before 2020.

To learn more about audio upgrades on all BMW manufactured since 2020, please click here: BMW 2020 Car Audio Package.

If you are not sure, please contact us to check the compatibility with your vehicle.


If you aren’t a Sydney local and can’t physically make it to our workshop, that’s not a problem at all! We can deliver this package directly to you with all the parts required for installation. You can either install it yourself or get it installed by your local car electrician. We provide all the instructions you need.

To top it off, we can help you with the sound-tuning remotely or we can pre-program the DSP device for your vehicle at our shop so you wouldn’t have to worry about a thing. Simply plug n’ play! We also include complimentary post-installation support (RRP$150) as part of our delivery service. So you get end-to-end support if needed once you’ve set it all up.


You are welcome to visit our Soundtech studio in Sydney, where you can listen to our demo car fitted with the upgraded sound system. Moreover, we have a soundbar set-up where you can listen to the other options of speakers to choose the ones that you like the most. Come experience the amazing results!