Installation Spotlight : An Engineer’s Perspective

This week at Car Home Stereo, we’re joining resident audio expert Tim on his mission to make the Land Rover Discovery 4 sound great. Tim has kindly taking the time to talk us through the process from his perspective, giving us audio enthusiasts an opportunity for rare insight into the sound engineer’s process!

 

The Process

This is the latest demonstrator for car and home stereo, the Discovery 4 commercial.

The challenge in this vehicle is the basic Harman Kardon system installed by the factory, the sound is flat and dull with poor separation and awful bass performance.

While we could have left the standard head unit in, I wanted the benefits of Apple Car Play. That meant mounting a unit discreetly into the dash screen location. There is very limited depth available, but fortunately the Alpine ILX-700 is perfect at just over 75mm deep. An original Discovery screen surround was purchased and modified to accept the Alpine unit.

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The original screen and controls had to be retained as the date and time adjustments are accessed from these. The answer was to relocate them to under the passenger seat.

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The original control button location proved an ideal position for the Audison Bit controller so an Alcatara trimmed panel was constructed. This allows quick access to all the amplifier settings as well as equaliser presets.

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I knew I was going to use the Audison Voce 5.1K amplifier and Bit 1 DSP and wanted to install them on show but without losing boot space. The solution to this was to mount the two units in a carpet trimmed panel in the existing boot panel recess.

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The same solution was applied for the sub on the opposite side, this time creating an enclosure in the storage pocket for the Hertz Mille 8 inch sub.

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Our speaker choice was the magnificent Hertz Mille 1650.3 two way components. These are absolutely amazing, offering a detail and clarity at any power level that is breathtaking. These were sited in the original door locations on custom built mountings. The door panel had full deadening treatment of course.

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It is difficult to describe how good this system sounds,it has to be heard. We love to show it off and would welcome you down for a demonstration.

Coming Home to Great Sound

Here at Car & Home Stereo Macclesfield, we love talking about our cars and how good they sound. This week, though, we wanted to take a look at the other side of what we do – bringing great sound to your home.

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Enjoying your favourite music at home has never been easier. The latest home sound systems let you feed through music from your favourite steaming apps, internet radio and your personal library collection – all from your phone or smart device. Car & Home Stereo’s resident connoisseur of sound technology, Tim Campling, has settled on the Bose SoundTouch as our brand of choice. First and foremost, this is because the Bose SoundTouch offers uncompromisingly brilliant sound quality.

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10 reasons why the Bose SoundTouch is a system we love!

  1. Bose SoundTouch connects you to an internet radio search system that lets you explore and discover music from around the world, Ecuadorian Jazz anyone?
  2. Stream music from your favourite apps, like Spotify, directly into any room of your house, all at the touch of a button. Planning a dramatic entrance? Que your favourite chorus to announce your arrival!
  3. The Bose SoundTouch is fully scalable. You can start small with a standalone unit, and work your way up to a full system.
  4. Installation sound daunting? We’ll send our very own sound system maestro Tim Campling round to help you get set up.
  5. Looking for something to sing along to in the bath? You can add Bose amps to bring great quality sound to your wet-rooms and outdoor spaces.
  6. Bose are constantly updating their SoundTouch software, meaning the app is increasingly easy to use and always getting neat new features – all included completely free.
  7. Planning a party? You can set different volumes or even different songs for each of your rooms, all from the same smart device.
  8. Fully compatible with your home cinema system.
  9. Sleek and slight, the Bose SoundTouch won’t interfere with your home decor.
  10. Uncompromisingly fantastic sound quality, crystal clear and richly textured.

As you can tell, we are huge fans of the Bose SoundTouch. You can get your hands on your first standalone unit for less than £200. It’s a fantastic way to enjoy new songs and old favourites alike, anywhere in the home, without routing around for old CDs.

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Sound good? Pop into our Car & Home Stereo Showrooms on Sunderland Street, in the Heart of Macclesfield, and we’d be happy to chat more about it. We look forward to seeing you!

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Instrumental Interlude

This week, an instrumental interlude to our weekly blogs on the world of car & home audio engineering, as we pause for breath and take a look our passion for making music.

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Tim is a keen musician and plays guitar for a local band in his spare time. Being active on the creative side of music allows Tim to better appreciate the aims and results of sound engineering. There’s nothing quite like hearing your own sound back in crystal clear quality!

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Here at Car Home Stereo Macclesfield, in the Heart of Cheshire, we take pride in our passion for all sides of music and sound. If you get excited for all things music & sound, make sure to get in touch – we love a good natter!

We look forward to seeing you.

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.