LMS Computer

Ian Colquhoun, founder and chief engineer at Axiom, runs a frequency response sweep on an Axiom prototype in the anechoic chamber. The boxes to Ian's left enable him to configure different values of inductors, resistance and capacitance for crossover testing.

The LMS is the primary frequency response sweep generator and distortion analyzer which we use in speaker design. This digital swept sine-wave analyzer operates with B&K calibrated measurement microphones. The loudspeaker under test is placed on a motorized turntable in Axiom's large anechoic chamber.

Rotating the turntable allows the LMS Analyzer (Least Mean Square) to make easy measurements of the loudspeakers at multiple axes and angles. It also is effective for listening window calculations.