Detailed information on Helix-hmf160

The 3D-Spiral Horn Speaker Building

Detailed information on Helix-HMF160

Added on 10. Nov. 2008

Measurements of Helix-HMF160

Mounted with Parc Audio DCU-F101W

Because of malfunction of the microphone (Primo EMU-4535-2), the new one (Microphone Madness MM-TMM-1) was used.
Therefore, a direct comparison with old data is not appropriate.

Resolution 21.53Hz ; Span 22050Hz
Magnitude -140 to 0 dBFS (FS : full scale)

measured with DCU-F101W

listening position

stereo,2m,center

mouth (rear hole) output

mono
center
(border of the mouth)

High resolution measurements

Resolution 5.383Hz ; Span 5512Hz
Magnitude -140.0 to 0.0 dBFS

	listening position stereo,2m,center
	mouth (rear hole) output mono center (border of the mouth)

Impedance measurements

Vertical axis has an arbitrary linear scale and is proportional to the impedance of the driver.
Resolution 5.383Hz

Comparison of Helix-HMF160 with MF140

Added on 10.Nov. 2008
hmf160: mounted with Parc Audio DCU-F101W
mf140 : mounted with Fostex FF85K

	listening position stereo,2m,center
	mouth (rear hole) output mono center (border of the mouth)

Vertical axis has an arbitrary linear scale and is proportional to the impedance of the driver.
Resolution 5.383Hz