JL Audio e112 Bedienungsanleitung Seite 15

| E-Sub
Crossover Switch
The "crossover" selector switch determines the operating mode of the E-Sub's
built-in active crossover.
"Off" defeats the crossover filter, completely removing this circuit from the
signal path and is most useful when using a receiver or preamp/processor's filters
and bass-management features.
"On" activates the on-board active crossover. This crossover consists of a 24
dB/octave low-pass filter for signals feeding the E-Sub's internal amplifier, plus
a 24 dB/octave high-pass filter feeding the "Line-Outputs" on the E-Sub's rear
connection panel. This is most useful when integrating the E-Sub into a two-
channel audio system.
Crossover Frequency Knob
The "crossover freq. (Hz)" selector knob allows the user to choose the
crossover frequency of the E-Sub's built-in, active crossover. It has no effect when
the "crossover" switch is in the "off" position. The frequency is variable from 25
Hz (full counter-clockwise) to 130 Hz (full clockwise). 80 Hz is a commonly used
filter frequency and usually serves as a good starting point for adjustments.
Polarity Switch
The "Polarity" switch allows the user to select between normal (0 deg) and
reversed (180 deg) signal polarity. The "Polarity" switch will primarily affect the
small frequency range around the crossover point between your subwoofer and
satellite speakers.
Unlike the "phase (deg.)" control, which effectively adds time delay, the
"Polarity" switch produces an instantaneous reversal of the signal's amplitude
peaks. For example, if at a given reference point a sine wave has an amplitude
peak, by flipping the "phase (deg.)" switch you instantly convert that peak
into a trough or amplitude dip. Because the effect of the "Polarity" switch
is immediate, it compliments the operation of the "phase (deg.)" control and
cannot be replaced by it.
When placing your E-Sub in the room, experiment with the "Polarity "switch
before adjusting the "phase (deg.)" control. Either position of the "Polarity" switch
may provide a smoother transition between your E-Sub and the satellite speakers.
Use source material with good mid and upper bass content for evaluation.
Page 15 | EN