Manufacturers Info

Brand: ???

Model: RT-155

Style: ???

Coverage (H x V): ???

Minimum Frequency: ???

Throat: 1"

Mounting Type: 2/3 Bolt

Dimensions (Diameter, Across Flats, Depth): 155mm x 135mm x 57mm

Additional Notes:

Random round truncated edge 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

Final Notes:

I'd rate the dispersion at roughly 70 degrees with only slight narrowing at the top octave. Pattern does start to widen below 3.5khz. Overall pretty smooth performance from this little waveguide both the directivity control as it tracks the on axis well and the frequency response from the CDX1-1731 loaded in this one.