Filter Controls - JL Audio JX360/2 Owner's Manual

FIlter controls

The active filter built into the JX360/2 can
be used to eliminate potentially harmful and/
or undesired frequencies from making their way
through the amplifier section to the speaker(s).
This serves to improve tonal balance and to avoid
distortion and possible speaker failure. Correct
use of this filter can substantially increase the
longevity and fidelity of your audio system.
1) "Filter Mode" Control: The JX360/2 employs
a 12dB per octave filter. This filter can be
configured into one of two filter types or
defeated completely by way of the three-
position "Filter Mode" switch:
"HP" (High-Pass): Configures the filter to
attenuate frequencies below the selected filter
frequency at a rate of 12dB per octave. This is
useful for connection of component speakers
the JX360/2's in a bi-amplified system.
Off": Defeats the filter completely, allowing the
full range of frequencies present at the inputs
to feed the amplifier. This is useful for systems
utilizing outboard crossovers or requiring full-
range reproduction from the JX360/2.
"LP" (Low-Pass): Configures the filter to
attenuate frequencies above the selected filter
frequency at a rate of 12dB per octave. This is
useful for connection of subwoofer(s) to the
JX360/2's in a bi-amplified system.
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2) "Filter Freq. (Hz)" A simple rotary control
adjusts the filter cutoff frequency of the filter
type you have selected with the "Filter Mode"
switch. This control will have no effect if you
have selected the "Off" position for the "Filter
Mode").
The filter in the JX360/2 is fully variable between
50 Hz and 200 Hz. The "80" Hz position is a
good starting point for tuning systems utilizing
typical subwoofers and component or coaxial
speakers.
JL Audio
preouts
The JX360/2 incorporates a pass-through
preamp output (Preouts) section, so that
additional amplifiers can be easily added to
the system. This pass-through pre-amp output
delivers the same signals that are fed into the
amplifier's Low-Level inputs. Input signals
applied to the High-Level inputs will not pass
through the Preouts.
The preamp output signal is not affected by the
"Bass Boost" processing selected for the amplifier
or by any crossover filter selected (if the input
signal is full-range, the preamp output will be
full-range).
Note: The signal level of the "Preouts" is always
line-level (low voltage).
JX360/2 9