Denovo EOS-12
Manufacturers Info
Brand: Denovo
Model: SEOS-18
Style: Elliptical Oblate Spheroid
Coverage (H x V): 90 x 50
Minimum Frequency: 800 Hz
Throat: 1.4"
Mounting Type: 4-bolt
Dimensions (W x H x D): 476mm x 328mm x 213mm
Additional Notes:
Auto-Tech Fiberglass SEOS Horn.
Wider vertical profile then the other SEOS waveguides.
Measurements:
Test Notes: Off axis and polars measured using an Eminence N314X
Mic distance 1m, measurements gated at 5ms and are smoothed at 1/48 Octave.
Horizontal:
Vertical:
Raw Horizontal Off Axis Response
Raw Vertical Off Axis Response
Horizontal Off Axis Response - Normalized to On Axis
Vertical Off Axis Response - Normalized to On Axis
Horizontal Polar Response - Normalized to On Axis
-6dB Coverage Angle Highlighted
Vertical Polar Response - Normalized to On Axis
-6dB Coverage Angle Highlighted
Final Notes:
As with the other 1.4" Waveguides/horns the top octave dispersion is determined largely by the driver phase plug design and throat angle match-up.
This 1.4" version of the SEOS-18 is taller and lends itself to a wider vertical dispersion then the rest of the normal 90x40 SEOS waveguides. Difficult to tell from the photos due to the gloss coating but the shape of this waveguide is more conical with smaller round-over transitions at the mouth then the smaller SEOS horns (in comparison to the overall size of the horn). I believe this is why more waist-banding is seen in the off axis dispersion.
Speaking of which the overall dispersion is quite wide nearing 100-110 degrees horizontal between 2-8kHz though this is partly a result of a small depression directly on axis as you can see a slight bloom in the same region moving a bit off axis. Vertical dispersion is also quite a bit wider but that is more to due with the taller aspect ratio of the horn, though some waistband still present there.
Overall quite a disappointing result in directivity uniformity for this larger SEOS horn in comparison to some of the smaller 1" options.