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USING THE PHASE SWITCH
Vehicle interiors can cause acoustical irregularities with the system's
bass response. The Punch amplifier has a 0°/–180° phase switch that
allows both Channel C outputs to be inverted simultaneously. Since
woofers will typically be connected to Channel C, the system's bass
response can be improved by experimenting with the phase switch.
• Phase Switch set to 0°
• Phase Switch set to –180°
Configure a 12dB/octave Low-Pass filter for Channel C
• XCard C set to High-Pass or Low-Pass
20Hz-80Hz
12dB/octave LP
LP
XCard C
LED
Ch. C
Bass EQ
Ch. C
Gain
Ch. C Ch. B Ch. A
Ch. B
Gain
Ch. A
Gain
L
R
L
R
L
R
Ch. C
Ch. C
+ R –
+ L –
0° 180°
XCard C
XCard B
XCard B
XCard A
0° Phase
LED
Ch. C
Bass EQ
Ch. C
Gain
Ch. C Ch. B Ch. A
Ch. B
Gain
Ch. A
Gain
L
R
L
R
L
R
Ch. C
Ch. C
+ R –
+ L –
0° –180°
XCard C
XCard B
XCard B
XCard A
180° Phase
LED
Ch. C
Bass EQ
Ch. C
Gain
Ch. C Ch. B Ch. A
Ch. B
Gain
Ch. A
Gain
L
R
L
R
L
R
Ch. C
Ch. C
+ R –
+ L –
0° –180°
XCard C
XCard B
XCard B
XCard A
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