Orion XTR Serie Manuel Du Propriétaire page 8

High-Pass Crossover
When the switch is to the center (FULL position), the high-pass cross-
over is bypassed . When the switch is to the right, the high-pass cross-
over is active . the high-pass crossover is continuously variable from
50Hz to 2000Hz .
Adjusting Bass Boost
Bass Boost maximizes the performance of a subwoofer and allows for
continuous adjustment of low frequency boost on the rear channels .
Bass Boost can be adjusted from 0dB to 18dB of boost centered at
45Hz . Initially the Q is very low (wide) . As Boost is added, the Q rises
(narrows) . this allows the amplifier to overcome acoustic deficiencies
in your vehicle . the type of enclosure used, the sub-woofer's excursion
capability, personal preference, and attitude determine acceptable
boost levels .
WARNING! exercise caution when setting Bass Boost . Maximum boost
can potentially cause woofer damage due to over-excursion .
NOTE: While the amplifier allows up to 18dB of boost, it is possible
to clip the amplifier with comparatively low output levels in other
frequency ranges .
Infinite Baffle Subsonic is set at 20Hz
By removing low frequency signal that the woofer cannot produce,
the woofer can play its capable range louder . the first example is
an infinite baffle situation . the first graph displays the frequency
response of a 12-inch woofer in an infinite baffle application without
the high-pass filter . As you can see, with +3dB of boost and the high
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pass filter set to 30Hz, the woofer has more output down to 25Hz and
less overall excursion when compared to the non-high-pass response .
Maximum physical excursion capability of the woofer is 15mm .
Figure 3
Figura 3
Abbildung 3
Figure 4
Figura 4
Abbildung 4
NOTE: the first graph is the response; the second graph is the driver
excursion . these designations apply to the following graphs
as well .
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