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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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Just want to say a massive thanks to all the lads at source for doing a perfect job of my stereo, sub and amp. I couldn’t be happier with how it looks and sounds. The costomer service was second to none. Next step for me is to upgrade all the door speakers so I’ll definitely be paying you another visit. Thanks again lads. Jamie (mk5 golf gti)

— Jamie Twibell

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.

— Matt Smedley

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.