Demonstration of Distortion

An interesting situation occurred at Car and Home Stereo recently that I would like to share. It highlighted a phenomenon that is quite counter intuitive and led to some interesting discussions.

We have a demonstration Land Rover Discovery that has a simple, high quality audio system installed that is tuned to perfectly suit the interior acoustics. We always encourage our customers to sit in and experience it as it shows what can really be done with car audio. The amplifier that powers the system is the magnificent Audison 5.1K which develops a true 1650 Watts.

There is one pair of component Hertz Mille Legend speakers in the front doors and a Hertz Mille subwoofer in the rear.

A customer recently auditioned the system and we spent a good hour playing different types of music with a view to producing something similar in his car. He was completely blown away with the sound, couldn’t believe the clarity and how the sub blended perfectly with the whole system. And then he said ‘I love it, but it’s not very loud is it?’. In fact he reckoned his standard Ford system was louder!

Now I know just how loud our system is and the odd thing is that the cleaner the sound the less we perceive volume. Since we had some time I decided to run a little proof experiment with my customer’s car.

As part of our equipment set we have an industry standard spectrum analyser which is also equipped with an SPL meter. It was a simple task to set this up in the Discovery first and then the Ford to compare. As expected our Discovery hit 126dB easily, the Ford however struggled to hit 110dB. In real world terms this equates to a perceived doubling of power (a true doubling is 3dB but we don’t really hear it that way). The next test was the distortion level. By plugging an oscilloscope into the amplifier output we can measure the clipping levels. Unsurprisingly the Discovery registered less than 5 percent distortion at full volume as this was how it was set up. However the Ford reached 5 percent at a little over half volume and climbed to over 25 percent.

There is no arguing with the figures so what is going on? Simply that the higher  distortion levels were being registered as unpleasantly loud and our brains are trying to get us to turn it down! Distortion is the quickest way to destroy a speaker or indeed your hearing.

At Car an Home Stereo we value our customers and hope to be providing high quality audio systems for many years. A distorted sound system will very quickly do serious harm to our hearing and that is why we only choose the best equipment and like to carefully set these up to give the best possible sound. Brands such as JL Audio, Audison, Hertz and Dynamat may not be the cheapest but certainly are amongst the best. The fact that when installed correctly they can deliver an amazing sound makes them excellent value for money.

As to my customer with the Ford, he now has a fabulous system based around a JL Audio amp and speakers with a Rainbow active sub. He loves to play it loud and I know it will give him years of pleasure without doing any harm.

If you want to experience the Discovery sound system or would like to discuss how we can improve your car please all us on 01625 432707.

What To Look Forward To In 2017

It’s good to be back after the festive break and there is a lot to look forward to in 2017.

World renowned audio manufacturer Audison have just announced their new Thesis speaker range. The Thesis amplifier represents the absolute pinnacle of performance without compromise and now there is a speaker set available to match. If you are looking for the absolute best possible sound then this is it.

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Staying with Audison, the new slimline Prima subwoofers and enclosures offer stunning bass performance from a very compact form. These will appeal to anyone who does not want to sacrifice much boot space but still demands a Hi-Fi response.

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There will also be a new Prima Pack custom installation kit for the BMW 1 series. This car has always had a very disappointing standard audio system and the Prima Pack is a tailored solution comprising the stunning AP amplifier, a custom Prima speaker pack and compact subwoofer. As with all the Prima Pack systems the factory head unit remains unchanged but the audio performance is greatly enhanced by the AP amplifier. The speakers fit perfectly into the factory locations and the sub is designed to blend seamlessly with the factory trim.

bmw1 car

On the other side of the Atlantic, JL Audio have released their amazing new processors, the new Fix and TwK.

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The FiX range is simplicity itself to use and automatically deals with all the anomalies inherent in vehicle factory head units. Building on the success of the CleanSweep processor, the FiX can automatically de-equalise audio streams and can even remove spurious time alignment errors giving  a flatter, more open sound from which we can build a better audio system.

The new TwK processors take this a huge step further by allowing access to a vast range of processors via the JL Audio software. From input/output configuration to full spectrum equalisation, this product means that every installation can be tuned to perfection.

Over the break we have been busy building new demonstration stands to showcase some of our best car audio equipment as well as tweaking our Land Rover Discovery demonstrator. This simple car audio system still astonishes me with its clarity and power showing what can be achieved with just one pair of speakers, a subwoofer and amplifier. If you haven’t heard it and can come down to our shop on Sunderland Street in Macclesfield I would encourage you to do so, it is sure to impress.

Our focus, as ever is on installation of the highest quality whether it is a simple dash cam or a full blown custom audio system. We are proud to be a part of the national FourMasters group offering the highest installation standards and a three year warranty on installations.

Please feel free to pop in or give me a call on 01625 432707 to discuss ideas and start your journey towards better sound!

Wishing you a happy new year!

We hope your 2017 has got off to a good start!

Here, at Car and Home Stereo we already have some exciting, new products coming through the door. Come to our shop on Sunderland Street, Macclesfield, and see what we can do for you.

Pitch Perfect – Rainbow’s Profi Line

Here at Car & Home Stereo Macclesfield, we’ve fallen head over heels for the Profi brand.

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Uncompromisingly brilliant, these incredible pieces of equipment embody the precision and passion of real expert craftsmanship. The sound is so crystal clear, that you feel as though you’re at a live performance. Our resident car audio system expert and musician Tim described the sound as ‘utterly transparent’, and when you hear what these speakers can do when installed with precision – you understand why.

 

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We’ll be honest, Profi line is not the cheapest way to get your hands on an audio system for your car. However if you want the best possible quality of sound, we think the Profi kit is worth every single penny. In common with all high end car sound systems, proper installation is vital to getting the quality of sound that you’ve paid for. Here at Car & Home Stereo of Macclesfield, we have a trained musician and qualified sound engineer with a passion for crafting perfect audio environments. Tim Campling offers a bespoke and comprehensive instillation service, tailoring each of his creations to the requirements of your vehicle and sound system – achieving perfect harmony between the two.

 

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Our doors on Sunderland Street, in the Heart of Macclesfield, are always open – so if you’d like to come by for a chat, look or a listen – make sure to pop in!

We look forward to seeing you.