All measurements were taken in same
conditions, all three arrays were put on 120*20
cm open baffle to assure equal conditions for all
arangements. Measurement microphone was
RadioShack's SPL meter connected to computer
sound card. It's output is not compensated yet.
Open baffles were put allmost to the wall,
which is easy seen on freq. graphs. Distance from
mic to speakers was to small for any serious
listening setup, but it was quite good to show
driver interaction in nearfield conditions. All
arrays are composed with 6 drivers, bessel array
is longer for dimension of one driver unit.
Upper graph shows response at 1 m
from array, second one shows response at 2m.