Merry Christmas to you all. Is it just me or does it seem to come around quicker every year? On behalf of my team, I would like to take this opportunity to thank each and everyone of you for your support this year. As the year comes to an end, there is just enough time to share with you some final news and products, before we head off to enjoy mince pies, turkey and mulled wine.
Have a good one all and hopefully, we will see you next year.
Regards Brian. Managing Director
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Product News
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Ecler WiSpeak
Installed in minutes with the ability to change the loudspeaker positions without worrying about any speaker cables. Manage the system and control speaker volumes from the WiSpeak grip application via IOS or Android devices. Pair up to 24 loudspeakers with a single CORE control unit. With 2 stereo inputs plus Bluetooth, a range of Cube, Tube or pendant speakers, and the ability to link additional CORE control units for larger systems, the Ecler WiSpeak offers a great solution for a wireless background music system in retail and commercial environments. Transmission range aprox 12 meters line of sight.
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RCF DXT4000
RCF have released their new DXT4000 EN54 compliant voice alarm system. Including MXR4500 rack mounted master amplifier (pictured left) which gives a total power output of 500w split across 2, 4 or 6 zones depending on the model. The system is fully compliant to EN54-16 and EN54-4 and comes with a range of optional accessories, including fire and paging microphones and network communication cards to allow for larger systems employing multiple units. For more information and advice, visit our website or call and speak to our team, who will be happy to help.
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Four members of our technical sales team travelled down to Adam Hall in High Wycombe, to attend the first LD Systems Questra certification training day. Questra is the design and management software for networked LD Systems installation solutions. It allows you to configure audio
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systems to be controlled via touch screen panels located throughout the installation. The training session covered networking, design and management of systems, and interface design. We are delighted that all of our technical sales team that attended (Steve, Neal, Marc & Matt) are now fully Questra certified. If you would like to know more about this innovative and exciting product, please don't hesitate to contact us for more information.
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Institute of Sound, Communications and Visual Engineers
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Commercial Audio Solutions Ltd have been a supporting member if ISCVE since 2011, and each of our technical sales teams are members of the institute in their own right. ISCVE exists to "Promote and advance the art, science and technology found within the Sound, Communications and Visual industry, for the general improvement of society." It achieves this through a range of activities and offers its members access to resources for their personal technical development, and to maintain and advance professional standards.
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We would encourage all our customers to consider membership of ISCVE in order to access the wide range of resources available, both technical and professional.
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Tech News
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Speaker Impedance & Power
Experience is great and after many years you probably have a good idea of what is going to work and what will not. Sometimes however, we need to be more precise or be able to prove our designs. Here are a couple of formulas that help us do just that.
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100V Line speakers make installation easy, daisy chain them and add up the wattage of all the speakers and that's the amplifier size you need.
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Sometimes however, we need to fault find a speaker line or know the total wattage of a circuit when we don't know how many speakers there are or what they are tapped at. Using an impedance meter, (a multi-meter will give resistance, not impedance), measure the speaker circuit and use the resulting measurement in the formula below:
10,000 ÷ Impedance (Z) = Total Power (P)
Alternatively, if you know the speaker wattage you can use this formula to check the measured impedance is correct.
10,000 ÷ Total Power (P) = Impedance (Z)
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Calculating impedance of low impedance speakers depends on if they are connected in series or parallel:
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If speakers are connected in SERIES
Impedance = SPK1 + SPK2 + SPK3
8𝛀 + 8𝛀 + 8𝛀 = 24𝛀
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If the speakers are connected in PARALLEL, then calculating the impedance requires a slightly different formula.
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Impedance = 1 ÷ (1 + SPK1) + (1 + SPK2) + (1 + SPK3)
1 ÷ (1 + 8) + (1 + 8 + (1 + 8) = 2.66𝛀
Shortcut : If in parallel & all speakers are the same, take the speaker impedance and divide it by the quantity.
3 x 8𝛀 speakers in parallel : 8𝛀 ÷ 3 = 2.66𝛀
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Full range of commercial audio products.
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Video distribution equipment.
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Cameo professional lighting range.
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If we can help in any way, please don't hesitate to get in touch.
01663 767888
sales@commercialaudiosolutions.com
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