The Art Of Tuning

We go to great lengths at Car and Home Stereo to find, test and install the best audio equipment available. Leading brands such as JL Audio, Audison, Rainbow and Hertz are all companies at the top of their game and are producing world beating equipment. An example of which is the new Profi range from German manufacturer Rainbow. Their T28 tweeter is one of the best speakers in the world right now.

 

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Car interiors have never been better, but unfortunately they are not the ideal acoustic environment. There are steps that can be taken to improve this and this should always be done before embarking on a serious upgrade. However, the (small) vehicle space still contains lots of soft and hard surfaces creating absorptions and reflections not to mention the fact that the speakers  and the listening position may not be in the ideal location.

 

Let’s imagine a fictitious “perfect” speaker. This unit has been designed to produce a perfect range of frequencies for a totally flat sound. This can be measured and verified. Now, let’s place it in a car in the typical location in the door. Allthough this is the same speaker the environment has had a dramatic effect on the sound output. To compound this our brains are very good at judging where sound comes from and the  speaker location will be very obvious. Our carefully designed and very expensive speaker has been severely compromised.

 

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So how do we fix this? We could re-engineer the speaker for the new environment but of course that is not practical. Fortunately the answer lies in digital signal processing. A modern, state of the art processor like Audison’s Bit 1 has the power to solve all the installation and acoustic problems we find in car audio. Of course, it requires a great deal of skill to set up properly but the results can be astonishing.

 

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All the issues of frequency cancellation or addition can be solved by using the powerful on board graphic equalisers. Positional issues can be solved by applying time delays to any of the speakers which will make it appear that the sound is coming from a different location. This will have the effect of making the sound stage wider and more dynamic, more like a live performance. Individual speaker level controls will ensure the sound is perfectly balanced for the driver or both front seats as required. We even have the ability to program multiple adjustments and to save them in up to four presets. This is especially useful for convertible cars so the sound can be adjusted for ‘top up’ and ‘top down’ at the touch of a button.

 

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Of course we have all the latest technology and tools to ensure the perfect sound for you.

 

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Our latest demonstration vehicle features this processor and we have built in the capacity to bypass it, it really is an ear opener to hear the difference a well set up processor makes.

 

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If you are interested and would like a demonstration of how good car audio can be, please call us on 01625 432707, we love to show it off!

Selecting a Subwoofer : The Nitty Gritty

Most music consists of a full range of audible frequencies, from low bass (bass guitar, cello etc) to high treble (cymbals, piccolo) although a notable exception is John Cage’ Four minutes and Thirty Three seconds. In simple terms – the lower the sound, the longer the sound wave and the more energy required to generate it. In practical terms – bigger speakers and a more powerful amplifier.

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“Bass is an essential part of music and is the part that adds the drive and excitement, try to imagine Michael Jackson’s Billie Jean or Prodigy’s Fire Starter without any bass, for example.”

“Can’t we just use a more ‘bassy’ speaker?”

To explain why this is not really the answer we need think about what a speaker is doing. In its simplest form a speaker is a vibrating membrane that is generating sound (pressure) waves and to produce lower sounds, the speaker cone has to move more slowly and further. This is no problem on its own but at the same time we need it to produce the mid and treble frequencies. These sounds require a very quick response and result in a very complex vibration pattern. Expecting a speaker to do both low and high frequencies inevitably ends in a compromise of both. The practical result of this compromise is at best a muddled, less defined sound and at worst a distortion that will lead to the destruction of the speaker. The only solution is a dedicated bass speaker, a subwoofer.

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Fortunately there are a wide range of compact, high performance woofers on the market now. Speakers that will operate in very small enclosures and take up minimal space. In a lot of cases, where I’m upgrading a factory Bose or Meridian system, I can use the existing bass speaker location for a completely stealth installation. In many cases I can use wheel wells, under seat locations or custom build enclosures in boot recesses. Even when none of this is possible there are woofers from Jl Audio and Hertz that offer spectacular performance from a unit little bigger than a couple of shoe-boxes.

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At Car and Home Stereo my system designs are always sympathetic to the vehicle but most of all it is my passion for music and great sound that drives my recommendations.

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.

Why Sound Deadening?

In the pursuit of great sound it is essential to consider all aspects of audio reproduction. JL Audio, Audison and others make tremendous speakers which have been carefully designed for accurate music reproduction, unfortunately we have to fit them into less than perfect environments!

The average car door is an acoustic nightmare. A thin, unsealed metal enclosure fronted with hard plastic fittings, often with a loose polythene moisture barrier as well.car-door- explodedCrucially, we want the full, uncoloured response from the speaker we are installing. Unfortunately the design of the door is working against us. Fundamentally, a speaker is a transducer converting electrical signals into pressure waves. Sound is generated from the front of the speaker and from the back.

This is important as the sound from the back of the speaker is playing into the car door. Some will be reflected back into the speaker cone causing distortion of the front signal. Some will be reflected into the door card creating unwanted resonance and annoying vibrations. The louder you want to play it, the worse it will be. speaker distortion

 

Some car manufacturers do apply a token amount of damping but this is just to prevent the panel from rattling, we want to optimise the enclosure for sound reproduction.

The answer is sound deadening. Quite different from sound proofing, sound deadening is about the control of pressure waves inside the door. By applying special materials we can eliminate unwanted resonances and reflections.

There are lots of different products out there but by far the best are Dynamat and Skinz. Dynamat Xtreme is the lightest and most efficient panel treatment I have ever used. It’s damping properties are second to none meaning less needs to be applied. All sound being radiated from the back of the speaker is absorbed and converted into low level heat. This of course stops unwanted vibrations and ensures that you only hear the sound from the front.dynamat door A liberal application of Dynamat behind the speaker prevents reflections.

I believe that it is essential to consider sound deadening whenever a speaker upgrade is installed. Otherwise you will never achieve the full benefit.

All about Car & Home Stereo!

Welcome to Car & Home Stereo! We are, of course, a shop specialising in audio systems but so much more as well.

Our aim is simple: to provide the best possible sound and exciting audio experiences.

Delivering that aim can take many paths but we have the products and tools to realise it. At this point I could just list all the different brands and product types we stock but that wouldn’t really help would it? I see my job as the deliverer of experiences. That may sound a little corny but I can’t think of a better description.

Let me introduce myself. I’m Tim and I have been the chief installer at Car & Home Stereo for over 30 years. I’m a qualified electronic engineer and keen musician. In those 30 years I have seen an almost unbelievable change in the equipment we have used and installed. Every different type of car has passed through our workshop and while the range of available solutions has constantly expanded and evolved, the goals have remained the same. Some products have promised much and delivered little while some unassuming boxes have revolutionised the way we think about audio. I strive to find the perfect devices to achieve the ultimate performance.

And there is the challenge; in a constantly changing arena while dealing with individual clients that all have differing requirements, how do you choose the right products? The only solution as far as I am concerned is to extensively test and evaluate products, invest in training and technology while constantly striving to improve techniques. If I focus on the end result then I can carefully choose the right products to achieve it. Of course that requires a good understanding of the clients requirements and that is why there are a lot of questions to ask. All great systems start with a conversation!

If you are ready to start your musical journey please call in or call me on 01625 432707 or 07971 928 881.