Tannoy K3838 Predicted Low Frequency Response

The K3838 drive units were introduced arround 1982/3,and were intended as replacements for the HPD-385A, which was discontinued(The HPD 385A had apparently become expensive to make as it used a magnetmaterial containing Cobalt - Alnico, Alcomax, or Ticonal magnets).

The response curve below was calulated using thepublished Theile and Small parameters for the K3838. The box volume was7 cubic feet, and a box Q or 7 was assumed. Three curves are shown for portfrequencies of 32, 37 and 42 Hz.

 

 

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