Coverage (H x V): ???
Minimum Frequency: ???
Mounting Type: 2/3 Bolt
Dimensions (Diameter x Depth): 180mm x 105mm
Random round sample waveguide/horn I had laying around.
Test Notes: Off axis and polars measured using a Celestion CDX1-1731
Mic distance 1m, measurements gated at 4.5ms and are smoothed at 1/48 Octave.
Because the waveguide is symmetrical I only tested the one axis.
Raw Horizontal Off Axis Response
Horizontal Off Axis Response - Normalized to On Axis
Horizontal Polar Response - Normalized to On Axis
-6dB Coverage Angle Highlighted
I'd rate the dispersion at 75-80 degrees though it does narrow towards the top octave. Good control down to just above 2k before things start widening. Decent low frequency loading of the 1731 with the knee extended out around 1k but the response is pretty lumpy with the big knee at just above 3khz.