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Monthly Archives: August 2013

  • Sennheiser Tourguide Hearing System

    A Tour guide audio system is designed to allow a presenter to talk directly to a group of listeners. Tourguide systems are usually portable wireless radio systems that allow the presenter and listeners the freedom to move around and still transmit/receive audio. They are commonly used in situations where it is hard for everyone to hear what is going on by just unaided speech alone or in environments where other people (not part of the group) are not wanting to be disturbed. At EAV Pro Audio, we are keen users and sellers of the Sennheiser 2020 Tourguide system and have sold it in to many different environments such as museums, universities, conference centres and other tourist attractions. The beauty of the Sennheiser Tourguide 2020-D system is that it is designed for ease of use and also allows for an undisturbed listening experience for up to 6 different groups simultaneously. You have multiple options at both the transmitter and receiver end. For the listeners, you can choose the HDE 2020-D-II stephoset receiver that allows for a comfy receiver with built in headphones. If you would prefer to use standard headphones, the EK 2020-D-II has a mini-jack input for use with any MP3 player headphones. When it comes to transmitting audio, your SKM 2020-D Handheld mic offers the presenter the familiar feel of a vocal microphone in hand. The SK2020-D belt pack transmitter allows you to plug in a headset or use a lapel mic to deliver a hands free tour in that manner. There is also the SR2020-D transmitter which is a compact ‘high tech’ unit. It allows for events to be interpreted simultaneously in up to 8 languages. You can also connect other audio content such as CDs, DVDs or things from your IT network. You can also connect a microphone to the unit for announcements. All the transmitters and receivers can be charged using the portable 20-way charger or the larger 40-way charger. This makes sure that you are always running on full juice and nobody misses a word. 2020d If you wish to discuss your needs or would like a quote for a Sennheiser Tourguide hearing system, just give us a call on 0845 125 9409 or email us at sales@e-av.co.uk Our team are happy to help and work closely with Sennheiser to make sure the system is right for you. We can offer a full demonstration or even an installation service of a tour guide hearing system if you would like however, these units are designed for ease of use and you may find that you will be up and running straight of the box.

  • Live Sound - Combatting Feedback in your PA System

    We've all heard the familiar high pitched whistle that nearly blows our ear drums at gigs. Feedback is a nasty beast and can ruin a gig for musicians and fans. Essentially feedback is a loop of sound. Your microphone picks up sound that has come from your speakers and sends it back through creating a loop that gives off this high pitched nightmare. There are a few ways you can deal with feedback and hopefully these handy tips will help.

    • First things first, try turning down the speaker volume on your main PA (and floor monitors if used) so that the microphones doesn't pick up any sound from them in the first place. I know turning down is never what a musician wants to hear but trust us, it’s better than a gig with unwanted whistles which detract from your songs. Also try moving the mics further away from the speakers if it is at all possible.


    • Ideally you want your microphones behind the main PA speakers on stage so that they are not pointing directly at them. Sometimes this isn't possible on smaller stages but if you can move the speakers in front of the mics or point them away from the mics, it will help.


    • Choose the right microphone for the job is one sure way to help with combating feedback. By this we mean the polar pattern the microphone has. Below is a chart of Polar patterns. You can see that a cardioid mic has the best sound rejection at the back of a microphone. This is particularly important if you are using stage wedges. Make sure that the wedge is directly behind the best sound rejection point on your mic.


    • Get the microphones closer to the sound source and knock the gain back on the mic. Basically, sing closer to the mic or move it closer to the instrument it is mic’ing up. This way you can roll off a little gain and pick up less of what you don’t want.


    • If the feedback is still persisting through the stage monitors, you could always try using In Ear Monitoring system or IEM systems for short. This way you take the speakers out the equation and it also frees you up to move around a little. The LD Systems MEI100 G2 is our biggest selling product on our website at the moment and it wont break your bank. It is certainly cheaper than most floor monitors.


    • Get yourself an EQ unit or system management controller. Our install team always puts an EQ unit in to any PA system we install. Not only will it get the best out of your PA in any given venue, you can target the frequencies that feedback occurs and drop them out. Before a gig, do the ‘Ring Out’ method of placing a mic on a stand and increasing level until you get feedback. At this point you turn down the relevant frequency on the graphic EQ unit. Do it a couple of times put don’t over do it or else you will end up knocking every frequency out of the PA and it will sound useless. Using something like a feedback destroyer or system management unit can really help too.

    90216-6d6383b041be0a7543664a0ac728411a If you have any great tips on combating feedback, Please let us know so we can share it with you all.

  • Wireless Microphones – What Frequency Should I Use?

    Wireless Microphones – What Frequency Should I Use? We have blogged about this type of thing before but with more wireless microphone systems coming out on the market recently, your choices as to what frequencies to use is slowly growing. I’m sure most people know about the frequency changes that took place over the last few years and for many people, it was and still is a confusing time. Hopefully this will help you decide which frequency range is right for you. If you want to check about existing wireless microphones you have or what future purchases you should make, check out our online wireless microphone frequency checker tool. Channel 70 (865 -863Mhz) – AKA The FREE Band Channel 70 has always been free to use for wireless microphone users. It is a very small band and you can only really run four systems together in that band. Sounds perfect for people only wanting to run a few systems however, channels 61-69 were recently sold off to mobile 4G networks and we have seen evidence that these may interfere with channel 70 and render that band unreliable. Couple that with the fact that channel 70 is now very crowded in most areas and you have a frequency band that is now less appealing. Our install team no longer install channel 70 wireless microphone systems in to churches or schools because of these reasons. Channel 69 (854-862MHz) – the old ‘Overflow’ or The Old Shared Band Channel 69 used to be the shared frequency band that was licenced in the UK (see channel 38 for the new one). It was also used by many as an overflow band for when they had one or two extra systems that didn’t fit in channel 70 (as it is directly below it). This whole band, along with channels 61-68, have been sold to mobile 4G networks and no longer available for wireless microphone use. In short, if you are running systems in this band, you are now illegal. Call us on 0845 125 9409 if you are unsure. Channel 38 (606-614MHz) - AKA The Shared Band Channel 38 is a block of frequencies that was newly made available to wireless microphone users a few years back. It is designed for people on the move and gigging from venue to venue. It is a licenced band and that will cost you approximately £75 a year and that covers you for the whole band anywhere in the UK. You can usually fit between 8-12 systems on channel 38 (depending on the make and model of the wireless microphone). If you’re a gigging musician or hire company then this is the band for you. It will cover you if you only ever use the systems in one fixed location however, anyone can buy a channel 38 licence and theoretically your next door neighbour could legally run 12 systems and you may run in to difficulties and for that reason a fixed site licence would be a better option in these cases. UHF Fixed Site Frequencies / Coordinated Frequencies  – Channels 21 – 30, 39 -60 These frequencies are designed for fixed locational use. Basically schools, churches, music venues or anywhere that requires wireless mics permanently installed to their building and will never be taken on the road. You have the choice of buying individual frequencies or hole channel bands for your venue to use (subject to availability). Once you have secured the frequencies that are available to you, no one else is legally allowed to buy/use those frequencies in your area. It is a much safer option and this is the route we take with our fixed site installs. If you want help finding out what frequencies are available in your area, feel free to call us or fill in our frequency checker tool. An individual frequency costs about £28 and a whole band would be £168 a year Wireless Microphones - standard UHF TV Band Frequency Chart  

    The UHF Wireless Microphone Frequencies

      1.8GHz Wireless Microphone Systems 1.8GHz wireless mics are relatively new to the market. In parts of Europe this is a free to use frequency band however in the UK, you do require a licence. They work the same as the fixed site licences and they are subject to availability in your area. Call for more information if needed. 2.4GHz Digital Wireless Microphones 2.4GHz Wireless Microphone systems are slowly taking off in the UK and more and more people are moving towards them. They are free to use both in the UK and worldwide and this is something that is attracting people. The audio quality is superb and as they are digital, there are no companders in the systems unlike regular UHF wireless microphones. Line 6 lead the field with 2.4GHZ radio mics however, Audio Technica are now chomping at their heels with the release of their ‘System 10’ mics. It may sound that 2.4GHz is the solution to everyone’s problems (and wallets) however, they do run on the same frequencies as most peoples WIFI and this can cause some issues if not setup correctly or used in a massively saturated WIFI environment. If you want more information on 2.4GHz wireless microphone systems, please give us a call on 0845 125 9409 or email us at sales(at)e-av.co.uk   The EAV team do their very best to keep abreast of all things wireless microphones and we are happy to help with any questions you may have. We are main UK dealers for Sennheiser, Audio Technica, AKG, Trantec & Line 6 and have stock of their radio mic systems ready to ship. Because of our roots in installation, we know which systems work in different environments and happy to discuss this with you. So for any information on wireless microphones, just call us on 0845 125 9409 Jonathan

  • Audio Technica System 10 - UK Overview Video

    Just a short blog to show you all the new video from Audio Technica UK that goes through all the great features in their NEW System 10 Digital Wireless Microphones. The Audio Technica System 10 Digital Wireless Microphones are licence free in the UK and worldwide and we predict these are going to be big sellers once the word gets around. Their are three systems available to you at EAV Pro Audio. The first is the Audio Technica ATW-1101L System 10 Lapel 2.4GHz Wireless, the second is the Audio Technica ATW-1102 System 10 2.4GHz Wireless Microphone and finally we have an options pack where you can simply buy the receiver and belt pack transmitter or you can add on a headset of your choice. The model number for that is the Audio Technica ATW-1101 Options System 10 2.4GHz Wireless. You can use up to 8 of these systems (I Know, surely they should have called it System 8) and they can stack on top of each other or we offer a 4-Way Audio Technica System 10 2.4GHz Racked and Ready solution or an 8-Way Audio Technica System 10 2.4GHz Racked and Ready bundle. For more information on digital 2.4GHz wireless microphones or general UHF wireless microphone, feel free to give us a call or drop us an email. Jonathan

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