The EQ-20 ParaPro is a 20 W audio amplifier with built-in parametric equalizer. Optional modules for Bluetooth and Noise Elimination are available. The EQ-20 is applied to adjust the received audio signal to your customs and thereby considerably enhance the intelligibility.

Parametric Equalisation: A parametric equaliser allows any specific part of the frequency range to be selected and adjusted in strength. The user is able to precisely select a frequency to boost or cut. For example, instead of having a simple mid-range adjustment as in a standard graphic equaliser which boosts or reduces a pre-set range of frequencies, you can specify exactly which frequency to boost or reduce. This gives you greater flexibility and accuracy to set the audio to suit your own hearing and environment. You can use the cut function to reduce problematic frequencies in order to expose the frequencies you want, which typically makes for a warmer, less harsh result, or you can boost specific frequencies to obtain more clarity and intelligibility.