Page 15 | e110 & e112
Crossover Switch
e “crossover” selector switch determines the operating mode of the E-Sub’s
built-in active crossover.
“O ” defeats the crossover lter, completely removing this circuit from the
signal path and is most useful when using a receiver or preamp/processor’s lters
and bass-management features.
“On” activates the on-board active crossover. is crossover consists of a 24
dB/octave low-pass lter for signals feeding the E-Sub’s internal ampli er, plus
a 24 dB/octave high-pass lter feeding the “Line-Outputs” on the E-Sub’s rear
connection panel. is is most useful when integrating the E-Sub into a two-
channel audio system.
Crossover Frequency Knob
e “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 e ect when
the “crossover” switch is in the “o ” position. e frequency is variable from 25
Hz (full counter-clockwise) to 130 Hz (full clockwise). 80 Hz is a commonly used
lter frequency and usually serves as a good starting point for adjustments.
Polarity Switch
e “Polarity” switch allows the user to select between normal (0 deg) and
reversed (180 deg) signal polarity. e “Polarity” switch will primarily a ect the
small frequency range around the crossover point between your subwoofer and
satellite speakers.
Unlike the “phase (deg.)” control, which e ectively 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 ipping the “phase (deg.)” switch you instantly convert that peak
into a trough or amplitude dip. Because the e ect 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.
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