From here you can link to a relevant document that will help you with your specific query about:
Radiomicrophones - Sound Systems - Induction Loops - Loudspeakers - Installation - Licences - Terminology - Technical & circuits

Radiomicrophones
Can you tell me the basic information about radiomicrophones (radiomics)
How do I wire a Trantec / Lemo connector
How do I wire an XLR connector
How do I set up the SENS (sensitivity) switch in  my IMG Stageline TXS bodyworn radiomic transmitter
How do I wire an a 2 wire lapel or headmic to my IMG Stageline 3 pin mini XLR (QC) connector
Which frequencies can I legally use without a licence within the UK
How do I avoid acoustic feedback (Howl)
Should I use UHF or VHF radiomicrophones
Do I need a licence for my radiomicrophone
My radiomic is too loud when connected to my mixer / amplifier

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Sound Systems
How do I wire up my new 100v line PA sound system
Can you show me how to wire & set up my 100v line outdoor PA sound system
Sound Services installed our PA sound system a number of years ago - can you help us set it up again and tell us anything about the components we have
Can you give me some tips on installing my 100v line PA sound System
Are there any basic rules for setting-up and operating sound systems
Which type of loudspeakers are best for my 100v line PA sound system
How do I avoid acoustic feedback (Howl)
What equipment do I need for an outdoor PA sound system (tannoy)
What equipment do I need for an indoor PA sound system (paging system)
What is a good all-round aerobics sound system
I need a portable sound system by the swimming pool (poolside sound system)

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Induction Loops for the hard of hearing
What advice can you give me about installing induction loops for the hard of hearing
What area can be covered by induction loops and what cable should I use
What is the Disability Discrimination Act
Do I qualify for VAT excemption as I am disabled
Do we qualify for VAT excemption as we are a Registered Charity

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Loudspeakers
Can you show me different types and styles of loudspeakers
Which type of loudspeakers are best for my 100v line PA sound system
How do I work out how loud the system will be - how do I calculate Sound Pressure Levels (SPL)
How do I wire up my new 100v line PA sound system
Can you show me how to wire & set up my 100v line outdoor PA sound system
How do I use a Neutrik Speakon connector

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Installation
Can you give me some tips on installing my 100v line PA sound system
How do I wire up my 100v line PA sound system
How do I wire an XLR connector
Can you show me how to wire & set up my 100v line outdoor PA sound system
How do I use a Neutrik Speakon connector
Sound Services installed our PA sound system a number of years ago - can you help us set it up again and tell us anything about the components we have

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Licences
Where can I learn about the WEEE regulations
Where can I learn about the RoHS regulations
Do I need a licence for my radiomicrophone
What licences must I get before I play music to my customers / members
How do I contact PPL so that I can play music top the public
How do I contact the PRS / MCPS alliance so that I can perform music in public

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Terminology
Can you help understand the terms used for hifi, video & TV etc. in the home

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Technical & circuits
Where can I learn about the WEEE regulations
Where can I learn about the RoHS regulations
Can you help us adjust and set-up a PA sound System that was installed by Sound Services
My mixer / amplifier does not have phantom power for my condencer microphones
How do I use a Neutrik Speakon connector
How do I wire an XLR connector
How do I wire a Scart connector
How do I wire a Trantec / Lemo connector
My radiomic is too loud when connected to my mixer / amplifier


click here to find information on the PA sound system that Sound Services installed for you