Orion HP-4600 - Manual (Page 13)

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Infinite Baffle Example High-Pass Set at 30Hz
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 left 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 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.
NOTE: The left graph is the response; the right graph is the driver excursion. These des-
ignations apply to the following graphs as well.
Sealed Example High-Pass Set at 20Hz
This sealed example is the same 12-inch woofer in the recommended sealed enclosure. Up
to 6 dB of boost is capable if 20 Hz was used. With +6dB of boost, the woofer has more out-
put down to 15 Hz.