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P.I.P.-XOV
output connector is provided as a
convenient means for “daisy chain-
ing” the signal from amplifier to am-
plifier. However, please note that
modes 8–14 do not provide any out-
put signal to the output connector.
Also note that modes 15–24 are to
be used only with the amplifier con-
figured in one of its two mono
modes (BRIDGE-MONO or PAR-
ALLEL-MONO). When the P.I.P.-
XOV is placed in one of these
modes, no signal will be fed to the
input of Channel 2.
Diagrams illustrating the connec-
tion of each mode are included in
Appendix A to assist your selection.
Crossover Selection
The P.I.P.-XOV is factory-set for
a crossover frequency of 800 Hz
with a Butterworth response. In-
cluded with the PIP are additional
resistors to change the crossover
frequency to 100 or 500 Hz, and
capacitors to change it to 1, 5 or
8 kHz.
Changing the filter type or its
crossover frequency is simply a
matter of plugging in resistors
and capacitors of the desired val-
ues. Six resistors and six capaci-
tors are socketed for this purpose
(Figure 2.1).
Three filter types are available:
B e s s e l , B u t t e r w o r t h , a n d
Chebyshev. Each differs in its
ability to provide ideal frequency
response, a constant signal de-
lay, and large stopband attenua-
tion. A brief description of each
type follows:
B e s s e l
A Bessel filter provides minimum
phase distortion throughout its
passband (i.e. the most constant
signal delay), which is desirable
for pulse-type waveforms, but has
the poorest stopband attenuation
of the three filter types.
B u t t e r w o r t h
A Butterworth filter provides the
flattest response in the passband
with a moderate amount of
stopband attenuation. This filter is
most commonly used in crossover
applications.
C h e b y s h e v
A Chebyshev filter has more at-
tenuation in the stopband at the ex-
pense of ripple in the passband.
For example, a 0.5 dB Chebyshev
filter has attenuation varying from
0 dB to 0.5 dB in the passband,
but has attenuation in the stopband
greater than that of the other two
filter types.
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