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Matthew Johnstone

  1. Introducing the LD Systems MAUI 28 MIX

    In recent years the market place has been literally flooded with new and creative solutions to that age old question “how am I ever going to fit this PA system into the back of my Volkswagen Golf hatchback?”

    Well around 2 years ago German company LD Systems released the MAUI 28″ column system, which became a best seller over night. This success motivated them to shrink down the technology further into a more compact system in the form of the MAUI 11. Fast-forward to October 2013 and LD are set to bring out a new addition to their monolithic “line array” range with the MAUI 28MIX.

    What’s new in the MAUI 28Mix?

    In terms of specifications very little has changed from the original MAUI, It’s 5-way Class AB amplifier still delivers 400w (that’s 200 Watts direct to the sub and another 200W for the array section), both of which can be manually adjusted depending on how much top or bottom you require. it still has Frequency response of 45 – 20.000hz and still has a

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  2. LD Systems DVOX Review

    This latest addition to LD Systems’ growing microphone section is the LD Systems DVOX – a large diaphragm studio condenser, which claims a suitability to vocals, acoustic instruments (such as piano, guitar and woodwind) and as a room microphone. To find out whether it’s set to rival microphone giants such as Audio-Technica and Electro-Voice by delivering a high-grade, professional studio microphone at a fraction of the price, I donned my headphones, broke out my ever-growing collection of musical instruments, and spent the evening putting the LD Systems DVOX through its paces.

    First Impressions

    The DVOX comes with an aluminium, foam-lined flightcase, microphone shock mount and windscreen. I particularly like the design of the shock mount which capitalises on the shape of the microphone by being open at the fr

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  3. Audio Technica AT2020USB+ Review

    The more common mixing desk and USB audio interface setup is being fast replaced by USB/firewire desks. More recently USB microphones, which save on space and money, are growing in popularity, versatility and quality so I teamed up with local musician Matthew Johnstone to find out how this latest offering from Audio Technica stood up to the more traditional arrangement.

    Audio-Technica AT2020USB+ Main Image

    Setup and First Impressions

    My experience of USB mics had been disappointing thus far but I had high expectations going into this session seen as the AT2020 was a studio mic in it’s own right prior to the release of the AT2020USB and new AT2020USB+ with headphone amplifier, volume and mix control. Both these newer offeri

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  4. QTX QR12PA Portable PA System Review

    Portable PA Systems are gaining popularity amongst presenters, fitness instructors and performers alike, offering a cost-effective alternative to bulky, cumbersome and complex traditional Public Address arrangements. Furthermore, battery powered PA’s are eliminating the need for a mains supply, adding to the versatility of these units.

    The QRPA Series comes with 10”, 12” and 15” low frequency drivers (QR10PA, QR12PA and QR15PA). The PA is essentially an upgraded version of the hugely popular QR active speaker, with an integrated mixer, MP3 player, two VHF receivers and two wireless handheld microphones. A built-in rechargeable battery features, as does a smaller amplifier to save on power consumption.

    NEW QTX QR12PA Portable PA System - Pro Audio Centre

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  5. Basics of Equalisation

    Equalisation is the name given to the process of boosting or cutting frequencies to improve the tonal quality of your sound system.  In this short article I’ll give you my views on equalisation, how it can help and where to get started.

    How can equalisation help me?

    • Equalisation can improve your sound noticeably and improve the naturalness or intelligibility of a sound reinforcement system by adjusting the frequency ranges most critical for speech.
    • You can also colour the sound to suit specific styles of music and venues.
    • You can increase the overall output level of a PA system by reducing the output of the frequency bands that cause feedback.
    • These frequency bands will change from system to system based on how the sound source is effected by room acoustics, microphone placement and loudspeaker location.

    What equalisation won’t do for you

    • Equalisation can’t change an inferior designed PA system a
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  6. How to Wire Mono Jack Type Speaker Plugs

    In this article, I’ll explain how to wire a conventional mono jack speaker plug.  The article assumes  you have cables, plugs, wire strippers, solder and soldering iron.

    • Check which kind of 1/4-inch jack you need. The cables and jacks are available in both mono and stereo.
    • Remove the outer shielding from the audio cable if necessary, and identify the necessary wires. Lay the cable down next to the connector plug and check the lengths of the exposed wires. There should be enough to reach all the contacts, but not so much that any exposed wire will be visible once the connector cover is screwed on. If your cable has a screw-on metal shield, be sure to slide this onto the cable before you start soldering, or you won’t be able to fit it.
    • Strip around 5mm of insulation from the tips of each wire, and loop them through their appropriate connectors. In a mono cable, attach the positive wire to the tab that protrudes from inside t
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  7. Induction Loop System for a Church

    We recently had a request from a Local Church for advice on fitting an induction loop system.  They have a small hall with many elderly parishioners and asked if we would advise them on a loop system.  After one or two questions regarding size, structure and sound source, we advised them on one of our loop kits. The one we chose was ideally suited to their environment and ease of connection and setup was essential.

    What is an induction loop system?

    Many customers get confused on precisely what an induction loop system is and how the system works. It’s quite simple really; an induction loop system provides an audio signal into a hearing aid via a magnetic field, greatly reducing background noise, reverberation and distortions that degrade clarity of sound.  Simple!

    We supplied our package :  “IDLOOPKIT1” 

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