Hill Acoustics was formed, to promote loudspeaker test chambers based upon the Tetrahedral Test Chamber principle expounded by our Chief Technical Officer - Geoff Hill. Loudspeaker measurements have long been a source of excessive variability with typical tolerances of +/- 3dB being the norm, whilst a tolerance of +/-0.1dB is typical for virtually all the rest of the equipment chain. Long frustrated by the state of loudspeaker measurements Geoff set out to provide a better alternative. Launched in 2013 we built various sizes of chambers whilst refining the theory & design. And understanding that international standardisation was a necessity we pursued this through the publication of the principles through: The Audio Engineering Society, ALMA, ISEAT and working with the International Electrotechnical Committee (IEC-TC100), on updates to IEC 60268-5, 60268-21 & 22, he worked with the AES SC-04-03 on the Loudspeaker Measurement Chambers, Information Document, AES73id-2019.