JL Audio JX 350/1 Bedienungsanleitung Seite 8

LOW-PASS FILTER CONTROL
The JX monoblock employs a 12dB/octave
low-pass active filter for its internal channel. This
feature is designed to attenuate frequencies above
its filter frequency, so that the system's subwoofers
do not reproduce any audible mid-range content.
The low-pass filter is fully variable between
50 Hz and 200 Hz via the "Filter Frequency"
control knob. 80 Hz (as shown in the diagram
below) is a good starting point for system tuning.
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"PREOUTS"
The JX monoblock incorporates a pass-
through preamp output (Preouts) section,
designed to make multiple amplifier systems easy
to set up. This section consists of a pair of RCA-
type jacks marked "Preouts".
These preamp outputs deliver the same signal
that is being fed to the Low-Level inputs. (If the
input signals are full-range, the preamp outputs
will be full-range). This signal is not affected by
the bass boost or Filter processing selected for the
amplifier.
!
I M P O R TA N T !
The "Preouts" of the JX250/1 and JX500/1 will
not pass signals from the Hi-Level inputs. The
JX1000/1D will pass signals from the Hi-Level
inputs and will attenuate them to Low-Level.
JL Audio