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5 . APPENDIX
ABF-260 HIGH PASS FILTER
A 4th order Linkwitz-Riley (24 dB/Oct) high pass
filter should be applied in the output signal path of
the ABF-260 .
If the ABF-260 is being driven by an AXYS
PB-800 Industry Amplifier, two output equalisation
filters can be cascaded together to form a 4th order
Linkwitz-Riley filter .
fig.3: Screenshot of applied equalisation to an IndustryAmp PB-400.
MAINTENANCE AND CLEANING
The ABF-260 is designed to operate for an extended
duration in a hostile environment . The driver enclosure
is sealed and water resistant, and should only need to
be removed after installation in the very rare event of
component failure . The enclosure and internal electrical
components do not require regular maintenance .
An acoustically transparent and water resistant grill
is mounted on the horn exit . This grill consists of two
perforated stainless steel plates contained within a rubber
frame . The grill protects the horn throat from the ingress of
16
Each of the two filter sections should be set to the
following values;
Type = Highpass
PB-400 or
®
Fc = 350 Hz
Q = 0 .707
water, bird droppings and other detritus . Regular cleaning
of this protection grid might be required in order to avoid
deterioration of the acoustical performance of the ABF-
260 . The required cleaning interval is depending on the
environmental classification with respect to dust deposit .
Although the ABF-260 is designed to withstand jet cleaning
equipment, such as may be used in tunnel cleaning
operations, it is advised to avoid spraying a high pressure/
high rate water flow directly into the horn mouth .
AXYS
ABF-260/100W PA6 V0 Low Profile Installation Manual Rev 1.1
®
202103/ABFPA6VOLP_IM_1.1
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