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2005 BMW 5 Series Audio Upgrade

As this customer likes music he was disappointed when he purchased this vehicle. The sound quality and volume were certainly lacking. We recommended a BMW front speaker upgrade kit from Rainbow. This was an 8″ midbass, 4″ midrange and 1″ tweeter.  These speakers were powered from an Audion Prima AP8.9BIT 8 channel amplifier. This amp was bridged into a 4 channel to give more power to the under seat woofers and the doors.

To give the customer low bass response we added a Hertz ES300D 12″ subwoofer. This was powered from a Hertz HCP 1D amplifier to give us 700w rms into the subwoofer. The ski hatch was also removed to help the bass transition from boot to cabin area.


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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.

— James Garton

Just would like to say a big thank you to Lee and all the team there for sorting my music system out in my car today. It was much appreciated that you managed to help me to pick a new cd player and install it and also the help after showing me how it all worked. Great service and help from all in the shop (know you were all rushed off ya feet) and still managed to help me out. Hope to see you all again when i’m ready for a new set of speakers for my ford probe. All the best

— Crow

Hi Guys Just want to say big thanks for squeezing my car in yesterday to fit subs and amp to my Subaru. Very professional job by Chris will definately use you again and recomend to my customers/friends keep up the top work. Thanks, Matt Smedley of cmv detailing and wrapping.