Life In The Loud Lane

At Car and Home Stereo we are dedicated to getting the best possible sound in your car. We will carefully match your needs to the best equipment and electronics to achieve that goal. We have access to a vast range of products so that we can tailor a system that is perfectly suited to you and your car. Of course what everyone wants is different and two extremes were both in the workshop at the same time recently.

If you have read the Lotus Evora blog you will know that the emphasis was on a stealthy install with the aim to produce a highly detailed soundstage. This was achieved with a full Audison system using the amazing AP8.9 Bit amplifier, Voce speakers and Prima sub, a simple system boasting 520W, more than enough power for the small cabin of the Evora. The final tuned sound of this car was fantastic. The music was surrounding with detail and punch where it needed it.

In the adjacent workshop bay at the same time was a Vauxhall Astra van and the brief for this one was very different. This had to sound good but most importantly it needed the ability to crush you with bass! Being a van we had plenty of space to work with but on the down side all that metal was a prime candidate for epic vibration. Power supply was always going to be an issue from the standard battery and of course with the power we were going to need, the standard wiring would not be adequate.

How we did it:

The first job would be to strip the vehicle for acoustic treatment. Every panel had to be coated to make sure all the enormous energy of the subs was retained inside. There’s no point in installing a 3000W system if 1000W gets out, it might sound good to passers-by but if you’ve paid for all that power, you want to hear it all. Once treated, tapping on any metal panel sounded like tapping on wood. There was no resonance and as a bonus road noise was reduced to almost nothing. The doors were treated with more Dynamat Xtreme to improve the acoustic response of the front speakers and again reduce road noise.

What next?:

The power supply was upgraded with two auxiliary Optima yellow top, deep cycle batteries with a split charge system. Even though the MTX bass amps are ‘D’ class they still draw a significant current and it was important to make sure this would not drain the vehicle battery. This kind of power has to be made safe and that means fuses on each battery and on each supply to the amplifiers, there may only be 12 Volts but the current capacity on the Optima batteries is more than enough to melt any cable and incorrect fusing could cause a fire if short circuited.

Once the power supply was installed we could mount the amps on the forward bulkhead. As this was destined for the show scene we made sure that everything was as neat as could be.

The eagle eyed of you will spot the cut outs for the MTX 6×9 speakers below the amps. This is an unconventional position for speakers as they are behind the seats but they will add a much needed boost to the low mid-range to complement the component speakers in the doors.

The three main amps are MTX RT1000.1Ds, These develop 1000W each at 2 Ohms which is why they need 50mm sq. power cable! The rest of the speakers are powered by a JL Audio XD400/4 and everything is kept under control by the Audison Bit 10. The front speakers were mounted in the standard location on custom collars and the tweeters were mounted into custom ‘A’ pillar pods.

This improved the staging for the front and solved the problem of the size of the tweeter being too large for the factory location.

So what about the subs I hear you cry!

Well this had to be the show stopper so we knew we would have to build something a bit special. The MTX TX612 is a beast of a sub.

With its awesome power handling capability we knew we could really push this speaker. It has incredible excursion and that red, double stitched hinge is not just for show. We wanted to get the most from this driver so we opted for an optimised slot ported enclosure, one for each sub. As you can imagine there is a significant amount of weight here so we also had to make sure that there was no possibility that any of this structure could move. Safety is always prominent in our minds when designing any system.

This is the finished enclosure although there will be trimmed wheel arch boxes either side for storage.

The auxiliary batteries and fuses are located behind the enclosure and are accessible by removing the top trim panel. There will be a voltage display mounted in the right hand arch box so battery condition can be monitored. The main fuse and Stinger 500A peak split charge relay are mounted in the bonnet with the vehicle battery.

Did we fulfil our brief?

And then some! With the tailgate open the bass completely dominates and you can feel the sound waves pushing your chest. If you dare to put your head inside the boot you’re immediately disorientated by the sound pressure level. When sat in the front you can hear the rest of the music as well and now that awesome bass complements rather than overpowers. Of course there is a level control for the bass but the temptation is to turn it up for the biggest smiles!

At Car and Home Stereo we know that this sort of system is not for everyone and we always ensure you get exactly what you need so regardless of what vehicle please give us a call and we can start your journey to a better sound.


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