A-190-E Mid-Bas Horn Speaker


Grand Teton National Park, WY, USA (Photo by Yuichi)

A-190E Specifications

= Horn Type : Exponential horn
= Back chamber : Closed box
= Cut-off frequency : 190Hz
= Frequency range : 250Hz to 600Hz
= Driver : 10in (25cm) dia. Electro Voice EVM-10M or equivalent
= Size W 750mm, H 450mm, D 545mm (pedestal not included)
= Material : Cherry plywoods 1in or 25mm thickness
= Finish : Teak oil
= Others
- Speaker terminals : Rear side
- Internal access : Rear baffle can be removed by loosing screws.l



....Jan. 1986 MJ Magazine ....
Building and assembly process

Drawing transfer on a plywood by pencil Cutting of a plywood by
a hand circular saw
Forming of front edge of
the horn
Completed top and bottom
horn plates
Completion of provisioning
of major plates.
Assembly process for both
side walls
Making slits on inner walls
for bending
Formation of inner walls
by a clamps/glue/screws
Assembly of driver
mounting panels
Assembly of horn
construction (Front view)
Assembly of horn
construction (Rear view)
Fixing of top plate
assembly

Internal construction view Installation of the driver
Measurement and Data

Left side data is a frequency response, 2nd and 3rd harmonic noise curves. Gain of harmonic noise curves are +30dB uplifted.
This indicates that horn load is applied from 290Hz. Up and
down in higher than 800Hz zone
came from reflection of top and bottom parallel planes.

Right side data is a admittance curve.
Left side data is a horizontal characteristics of a frequency response. It shows output of 0 degree (center), + or - 22.5 degree and + or - 45 degree
from the center axis.

Right side data is a vertical characteristics of a frequency response. It shows output of 0 degree (center), + or - 10
degree and + or - 20 degree
from the center axis.

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