Krell Industries MASTER REFERENCE SUBWOOFER - Manual (Page 45)

Notes
You can switch the low-pass filter on and off using the mute key, to help compare the filter
levels. Every time you adjust the level, the front panel display shows the numeric value of the
level. After three seconds of inactivity, the screen becomes blank. You have adjusted the
high-pass filter.
You can also use a sound pressure level meter for this process; however, it is not required.
B. Adjust the Low-pass Filter
1. Press the menu key (37).
2. Press the up adjust key (43) to select MUTE .
3. Press the enter key (38). The front panel display (4) shows the current settings
for mute.
4. Press the up adjust key to select HPF ONLY .
5. Press the enter key.
6. Press the menu key to exit the menu mode.
7. Press the mute key (34) to mute the high-pass filter. You hear noise only from
the Master Reference Subwoofer.
8. Press the section sub key (35).
9. Press the parameter level key (42).
10. Use the adjust keys to raise or lower the low-pass filter level so that it matches
that of the high-pass filter.
11. Make sure you unmute the high-pass filter, after you have adjusted the
low-pass filter.
Notes
You can switch the high-pass filter on and off using the mute key, to help compare the filter
levels. Every time you adjust the level, the front panel display shows the numeric value of
the level. After three seconds of inactivity, the screen becomes blank. You have adjusted
the low-pass filter.
You can use this process to adjust your system level for individual CDs or DVDs.
When the noise generator is on, all other inputs are turned off and the by-pass output is
muted to keep loud noise from going to the next device.
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