Technical Terms to do with the types of equipment we use.

 

 

8 Ohm (4 ohm,2 ohm) low impedance speaker system – Used for indoor and stage systems.  These require correct connection to prevent damage to the amplifier and to produce sound at its best.  This system allows for a wider frequency range.

 

 

 

 

100 Volt line speaker system – the speakers we use for outdoor events that give greater coverage and better distribution of the amplifiers power.  It also allows us to run cables up to a mile long.

 

 

Balanced Line Microphone– These microphones are of a type that reduce outside interference and radio signals. If a normal microphone is left plugged in, it can still receive a radio signal and act as an aerial. With Balanced Line, the signal is cancelled and so no interference will take place.

 

Induction Loop  or AFILS– Audio Frequency Induction Loop System.  A wire connected to a special amplifier that creates and electromagnetic field, which can be picked up by a hearing aid set to “T” (Some modern aids will self select if it detects a signal).

 

 

Radio Repeater– A signal booster for radio systems to increase the range at which they can be used.  Depending on the terrain and conditions, it will extend the coverage by 4-5 times and in some areas a lot more.

 

UHF – Ultra High Frequency Radio Signal (Radios and Radio Microphones)
Newer, higher frequency range than VHF. Can have limited range in built up areas.  Mainly digital radios that can share frequencies with other users.

VHF – Very High Frequency Radio Signal (Radios and Radio Microphones)
Performs well in most circumstances, but only available in analogue systems.

Watts – A measure of audio power.  Several scales of measurement:
PMPO (Peak Music Power Output) is usually found on domestic equipment.
RMS (Root Mean Square), is an accurate mathematical representation of a speaker’s power output, measured over time rather than a few microseconds.
Our equipment is all quoted using RMS watts.