Boss Audio Systems PH1500M User Manual page 11

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
High pass filter
crossover
LEFT
Speaker
MINIMUM
SPEAKER
IMPEDANCE
4 OHMS
RIGHT
Speaker
Subwoofer
L R
SPEAKER CONNECTIONS
BRIDGED MODE
High pass filter
crossover
Low pass
filter inductor
SPEAKER
IMPEDANCE
8 OHMS
2-Channel Amplifiers 2-Channel Amplifiers
PH2.500, PH2.600, PH2.800,
PH2.1000, PH2.1300, and PH2.1500
Component values for
6dB Passive Crossover
FREQUENCY INDUCTOR CAPACITOR
80 Hz 7.5mH
100 Hz 6.5mH
120 Hz 5.5mH
150 Hz 4mH
+12V
FUSES
POWER CONNECTIONS
PHANTOM MOSFET Amplifier User's Manual - page 11
470uF
330uF
330uF
220uF
GND
REMOTE
Chassis
ground
point
to REMOTE TURN-ON
terminal of head unit
FUSE
Battery