Call us on 0114 257 1550


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.


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 had a speaker upgrade, along with sub and amp fitted by these guys ……. everything, from product knowledge to installation is amazing, thanks to Jordan for getting me to buy what i needed, not what i thought i needed and to Paul and the team for the most awesome installation and sound experience an my T6 ……. it really is unbelievable the difference……. i knew it would be good, but this is astonishing!!! …… if you want the best, listen to what these guys say to you and go with them!!! …… Thanks so much guys …… got my dream wheels now you’ve had your mitts on her ….. awesomeness!!!

— Mark Wilford

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

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