Acoustic modelling acoustics ACS Gold Line PanBeam ACS PanBeam Gold Line aerial distribution AL1 Acoustilyzer audio recording audio troubleshoot channel 38 channel 70 Church Acoustics Church Reverberation Demonstration Room Digital Dividend Review DL1 Digilyzer DR2 Digirator electro-acoustics FD23 Feedback detector Gold Line GoldLine ZM2 important Loudspeaker Loudspeaker Demo Room Loudspeaker Demonstration Room Minirator ML1 Minilyzer MR-PRO Minirator MR2 Minirator NTi NTI MR-PRO ponytails radio microphone frequency scan radio microphones Remote Measurement Option RF interference RF scan sound Sound Engineer Sound recording sound system design Stadium Sound Testing user manual wireless microphone scan XL2 audio and acoustic analyser XL2 Remote Measurement Option