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The Source Golf – Hertz SPL Monster…

August 24th, 2012

Meet our Demo Van – The Source Golf

The Source Golf - Hertz SPL Monster...Meet our demo vehicle, the Source Golf – Hertz SPL Monster… As we go through the audio system we have a total of 100, yes 100 speakers.  They are combined in Hertz Energy ESK 165 components, Hertz Energy ECX 165 coaxials, Hertz Energy ES 250 subwoofers, Hertz SPL Show SV 165mids and Hertz SPL Show ST 25 tweeters. All of these speakers, with the exception of the subs, are mounted in either a custom built fibre glass dashboard or door panels.

The Source Golf - Hertz SPL Monster...The subs are mounted in a custom built sub box and are fitted in 6 banks of 6 subs which are highlighted with custom orange LED lighting. To power all these speakers we also have a total of 17,520 pure RMS Watts which is made up of 9 Hertz HE4 4 channel amplifiers and the SPL Monster MP 15K Unlimited which alone contributes 15,000 of those RMS watts to drive the 36 10″ subwoofers. To drive this behemoth of an audio system, there are 2x 250a alternators fastened to the engine. This has been done by using a custom fabricated bracket made from 10mm solid steel.

In the rear of the vehicle there are 6 (plus 1 under the bonnet) Kinetik HC1200 heavy duty audio batteries all linked via 0g cable to the 2 thunderous alternators. To manoeuvere the vehicle you sit on the centre section of the Hertz amps which form a seat base.

The source unit for the entire system is a Kenwood touch screen monitor. This is linked to solid state media such as an iPod or USB memory sticks. This was done as CDs were likely to skip and jump with the amount of bass the system creates. The vehicle can also be remotely operated from an iPad and via a Bluetooth receiver from an iPhone.


The Full Range signal from this screen goes into an Audison BitOne before being split into High and Low frequencies. The high frequency range goes into 2 Audio Control Matrix line drivers before being fed into the 9 Hertz amplifiers. The lower frequency outputs through Audio Control Epicentre before reaching the monstrous MP15k amplifier.

The vehicle itself has undergone some major engineering work and custom modifications to get it where it is today. The doors have been built in house to motorise outwards and lift up. This then reveals the inside of the vehicle to the world.

The radiator has been moved from its usual home and now locates to the rear of the vehicle. This was done to house 2 huge 250a alternators that power the system, with each alternator having its own voltage regulator.

Due to the location of the amps, a custom handbrake mechanism was designed which now motorises on and off from the flick of a switch instead of the cumbersome original VW handbrake. The vehicle sports a hi-tec Clifford Thatcham category 1 alarm system to keep it fully secure.


Check out this latest promo video for our amazing golf!

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 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

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

Paul and the lads are great at Source Sounds…
Had a high end audio build done in my car. They designed everything to my spec… The work, fabrication and quality are faultless…
Had a problem with my alarm from a previous installer which they have fixed and had no issues since…
Just installed a tracker in my new car… great advice on which to go for as there are a few on the market, work was done in short period of time…
Already in talks of planning another audio system upgrade with them…
Im from Leicester they are in Sheffield about 75miles away… more then happy to travel to them as never had any issues once my cars drove out, they definately know their stuff… their customer service and help are TOP