Dayton H812

Manufacturers Info

Brand: Dayton

Model: H812

Style: Exponential

Coverage (H x V): 100 x 60

Minimum Frequency: 800 Hz

Throat: 1"

Mounting Type: 2/4-Bolt

Dimensions (W x H x D): 12-1/2" x 7-7/8" x 8-1/8"

Additional Notes:

Thanks to jvphotog for sending me this horn to test.

Appears to be the same horn design as the Celestion H1-9040P.

Bolt holes for mounting the compression driver would not line up and had to be drilled out to fit. Narrower then the 3" or 75mm spacing that I commonly see.

Measurements:

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.

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:

Exponential flare profile shown normal narrowing pattern as frequencies rise. Rated 100 x 60 degrees is roughly appropriate depending on where exactly you want to define the radiation pattern.