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2015 BMW 4 Series Audio Upgrade

Upon listening to his ‘new car’ this customer decided the sound quality was terrible and he wanted an improvement.  After lengthy discussions the customer opted for an Audison AP1 tweeter and an Audison AP4 midrange speaker to replace the factory speakers in the front doors.  We didn’t change the speaker under the front seats as this was to be beefed up with an amplifier. The amplifier used for the system was an Audison Prima AP8.9BIT 8 channel amplifier with a built in processor.  This amp ran the front under seat speakers bridged and then the 4″ and tweeter were run active.

On the first listen of the car, the customer was blown away with the difference and how easy it was to adjust individual frequencies to tailor the sound to his specific needs.


The UK's Ultimate Car Audio, Security and Navigation Specialists, having been voted on numerous occasions by the "UK's Best Installers" by the Car Audio, Security & Navigation Industry Find out why...

Just a quick note to thank you for your professional advice on my recent upgrade on my Toyota hi-lux , your team is both courteous and professional in all aspects of the service. I will recommend you to anyone who asks, and will be back with my other vehicle

— Timothy Pickard

Source Sounds recently completed a stealth boot install in my Octavia, along with new front speakers and some additional little tweaks. The work they have done has been immaculate. You would never know the anything had changed, until the music starts that is. The improvement is immense. I just want to take my car for drives, just to listen to things.

I highly recommend Source Sounds. Excellent work, very helpful and knowledgeable staff and excellent aftercare and support. I wouldn’t go anywhere else for my ICE needs.

— Matthew Watkins

Source Sounds is the place to go if you are thinking of having any upgrades done to your vehicle!! They have a vast range of products to choose from, very friendly staff members who will go the extra mile to meet and go beyond customer expectations. The work they carry out is second to none, they have always done a really good job with my audio upgrades both with my current vehicle and my old one. I will be definitely going back in the future to get some more upgrades done. Would highly recommend them to everyone!! Big shout out and thank-you to Jordan and his team to make this possible.