Induction Loop Amplifier v.s. Audio Amplifier

Ocassionally in older churches, a "normal" audio amplifier is being used to drive an induction loop for the hard of hearing. This is the "way it was done" when purpose built induction loops did not exist. However, these days, it is NOT really acceptable to continue to do this....

We do not recommend using a standard audio amplifier to drive an induction loop as they really are not designed for this job. Having said this, they do work and are able to drive a loop, but it is very taxing for the amplifier to drive a low impedance loop and often the sound quality on the loop is much lower than that from an induction loop amplifier. You are also at risk of damaging the amplifier. Induction loop amplifiers are designed to drive the high current needed for a loop, they also have built in compressors to ensure that even if the source signal gets quieter or louder, the signal provided to loop users is of a consistent level, ensuring that they have a comfortable sound level in their hearing aid.

We supply a full range of induction loop amplifiers for all sizes of room, if you plan to replace your audio amplifier with a dedicated loop amplifier, we will need to know the dimensions of your room to be able to specify the correct amplifier.

Also check before re-using your existing loop cable that there is just a SINGLE turn around the room. To increase the impedance of an old loop they used to take several turns around the room (this was to prevent the audio amplifier overheating). It is not acceptable to have multiple turns with a modern loop amplifier.

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