Krell Industries MASTER REFERENCE SUBWOOFER - Manual (Page 42)

(SECTION FOUR: Connections and Configurations continued)
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Step III. Configure the Programmable Electronic Crossover
This section explains how to configure the subwoofer’s two sections, the low-pass (sub)
and high-pass filters, by selecting the appropriate filter profile (Butterworth, Bessel,
or Linkwitz-Riley), and adjusting the slope, frequency, and level parameters for each
filter profile.
Configuring the programmable electronic crossover is required for stereo and
stereo/LFE operation. Krell recommends performing the configuration in the order
indicated below.
A. Select the Low-pass Filter
Press the section sub key (35) on the remote control to access the low-pass filter
parameters. The front panel display (4) shows SUB ADJ .
B. Select the Low-pass Filter Profile
Press the type key (39) to access the filter profile. Press the adjust keys (43) to
select the profile you want. The Master Reference Subwoofer has three low-pass
filter profiles available: Bessel, Butterworth and Linkwitz-Riley.
C. Adjust the Low-pass Filter Parameters
IMPORTANT
Adjust the parameters in this order: slope, frequency, and level.
1. Low-pass Filter Slope
a. Press the slope key (40).
b. Use the adjust keys (43) to adjust the slope (in 6 dB increments). The
low-pass filter has a range from 6 dB to 48 dB.
2. Low-pass Filter Frequency
a. Press the frequency key (41).
b. Use the adjust keys (43) to select the desired frequency setting (in 10 Hz
increments). The frequency selectable ranges from 30 to 100 Hz.