(1/4 wave resonator)
Use: Pro Audio
Recommended Driver(s): 18 Sound 18WL2400
Fb: 36.8 Hz
Dimensions: 101.6 cm x 571 cm x 724 cm (40" x 22.5" x 28.5")
The objective of this design was to produce a reasonably compact
"tapped-horn" using an 18" driver that would have decent performance and the
ability to be fed with power in excess of 1kW without experiencing excursion
issues. An extended high frequency response was also an objective.
The imput parameters to the
corresponding HornResp simulation are as follows:
The predicted frequency response with the 18 Sound 18WL2440
driver is as follows:
group delay is as follows:
A cutsheet for the TH18 can be downloaded
here. Note that the cut sheet does not
include bracing. A suggested bracing scheme is shown below
Some build pictures...
thickness of the bottom panel to reduce the tendency of the box to
"walk" at high volume.
Using a metal grille at the mouth
that's fastened to all four sides will also reduce panel flex.
DIYAudio discussion thread