Detailed information on Helix-ag280z

The 3D-Spiral Horn Speaker Building

Detailed information on Helix-AG280Z

Added on 14. Dec. 2007

Helix-AG280Z mounted with FE206E has an analogous structure to AG160Z with two front openings.
A small amount of damping material was put in the upper triangle space. The upper triangle is for reinforcement of the top plate and for prevention of a standing wave.

	Fins were glued on the side plate. The edges of the fins were rounded for a smooth sound passage.
	The all parts.
	Trial assembly 1.
	Trial assembly 2.
	Trial assembly 3.
	Trial assembly 4.
	Trial assembly 5.
	The finished assembly.

Measurements of Helix-AG280Z

Added on 14. Dec. 2007

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)

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