Boss Audio Systems PH1500M User Manual page 13

Power and Speaker Wiring
Tri-Mode
Tri-mode operation allows you to connect this amplifier to a pair of main speakers
plus a subwoofer on one pair of output channels. The main speakers will operate
in STEREO while the subwoofer simultaneously operates in MONO.
To set up the amplifier to run in this mode, put the crossover switches in the FULL
position. Insert high pass filter capacitors and a low pass filter inductor into the
wiring as shown below. Be sure to check the table at the bottom of this page to
determine the correct capacitor and inductor values for the crossover frequency
you wish to achieve.
Tri-Mode
Component values for
6dB Passive Crossover
FREQUENCY INDUCTOR CAPACITOR
80 Hz 7.5mH
100 Hz 6.5mH
120 Hz 5.5mH
150 Hz 4mH
SPEAKER
IMPEDANCE
8 OHMS
SPEAKER
IMPEDANCE
8 OHMS
470uF
330uF
330uF
220uF
Low pass
filter inductor
1 2
CH CH
SPEAKER CONNECTIONS
BRIDGED MODE
High pass filter
crossover
–
+
High pass filter
crossover
–
+
Low pass
filter inductor
LEFT
Subwoofer
PH4.400, PH4.500, PH4.600 and PH4.700
RIGHT
Subwoofer
High pass filter
crossover
CH3
Speaker
High pass filter
crossover
CH4
Speaker
+12V
3 4
CH CH
FUSES
SPEAKER CONNECTIONS
BRIDGED MODE
CH2
Speaker
MINIMUM
SPEAKER
IMPEDANCE
4 OHMS
CH1
Speaker
PHANTOM MOSFET Amplifier User's Manual - page 13
4-Channel Amplifiers
MINIMUM
SPEAKER
IMPEDANCE
4 OHMS
GND
REMOTE
POWER CONNECTIONS
Chassis
ground
point
to REMOTE TURN-ON
terminal of head unit
FUSE
Battery