Detailed information on Helix-hmf200

The 3D-Spiral Horn Speaker Building

Detailed information on Helix-HMF200

Added on 21. Jan. 2009

	All 16 fins have the same shape. Angle is 6 degree, length is 193 mm.
	Draw lines on the side plates.
	Bond fins on the side plates.
	Trial assembly 1.
	Trial assembly 2. Cover the base plate with a plastic bag.

Comparison of Helix-HMF200 with HMF160a

Added on 21. Jan. 2009
Resolution 21.53Hz ; Span 22050Hz
Magnitude -140 to 0 dBFS (FS : full scale)

Drivers used for measurements
HMF160a : DCU-F101W
HMF200 : FE103E

listening position

stereo,2m,center

mouth 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 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