Apogee Duetta Instructions Manual - Page 19
Browse online or download pdf Instructions Manual for Speakers Apogee Duetta. Apogee Duetta 20 pages. Exchange of the bass slides
Print PageNow you can adjust the resonant
frequencies of the film. You will
need an amplifier, a measurement
microphone and a suitable audio
measurement software such as
ARTA, True RTA or DSSF3
To adjust the resonance
frequencies the speaker into
position first so that it can swing
freely backwards or put him up
with the help of a second person.
Then you start at the top of
loudspeaker and stretch the film
with the help of lateral locking
screws so that a resonance
frequency around 47 Hz setting.
In the central part of the speaker
repeat the whole and make there
a resonance frequency around
44 Hz.
In the lower area to achieve
about 38 Hz or less. Mind you
do not like it too tight to tension
the films. It is possible that with
taut tension to the film tears..
After you have set all three areas
check again with a larger distance
to the microphone frequency
response of 25 to 150 Hz while
you should see three more or less
pronounced peaks. Maybe there
are still some postcorrections the
individual frequency ranges
necessary.