8-8
Lexicon 480L Owner's Manual
Page Two
FR-1 L and FR-1R
These controls allow frequency settings to be adjusted
independently on either the left or the right channel.
Frequency settings fall between 30 Hz and 17 kHz.
Q
Q adjusts the amount of bandwidth affected by the level
control. The Q is determined by dividing the center
frequency by the bandwidth to be affected (in Hz.). For
example, if a frequency of 1000 Hz is selected, and the
bandwidth to be boosted or cut is 500 Hz, the Q = 2. The
Page Two filters provide a Q adjustment from shelf to
Notch ( Q =16 or Q =32). The Shelf (SL) on Page Two
filters is a low frequency shelf. This means that with a
frequency of 500 Hz, a level of +12 dB, and Shelf (SL)
selected, frequencies below approximately 300 Hz will
be boosted by 12 dB, and 500 Hz will be boosted
approximately +9 dB. The Notch feature is found only
on the Page Two filters and is optimized for low
frequencies.
LEV
LEV provides level boost or cut at the defined fre-
quency and Q settings. LVL is adjustable between -12
to +12 dB when the Q setting falls between shelf and Q
= 7. When a Notch Q is selected (Q=16 or Q=32), LVL
is adjustable between -36 and +36 dB. This only
applies to the Page Two filters.
Page Three
FR-1 L and FR-1R
These controls allow frequency settings to be inde-
pendently adjusted on either the left or the right chan-
nel. Frequency settings fall between 30 Hz and 17 kHz.
Q
Q adjusts the amount of bandwidth affected by the level
control. The Q is determined by dividing the center
frequency in Hz by the bandwidth to be affected in Hz.
For example, if a frequency of 1000 Hz is selected, and
the bandwidth to be boosted or cut is 500 Hz, the Q =
2. The Page Three filters provide a Q adjustment from
shelf to Q = 7. The filters on Page Three have a high
frequency shelf that boosts all frequencies above the
set frequency. This is identified by “SH” in the Q
display.
LEV
LEV provides level boost or cut at the defined fre-
quency and Q settings. LVL is adjustable between -12
to +12 db.
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