User Guide
Power
and
Speaker
Wiring
4-Channel
Amplifier
h
MR250.4
E:t)
Chassl.
ground
CH3
polnt
Sponker
to
REMOTE TURN'ON
CH4
o
Speaker
FUSE
l~atte~1
SPEAKER
IMPEDANCE
Connect rile Negative
(-J
terminal
of
Ihe RIGHT
4-8 OHMS
subwoofer to the CH4(-) amplifier tarmlnal.
RIGHT
Connact lhe Postive
(+)
terminal
of
!he RIGH
Subwooler
subwoofer 10 the CH3(+) amplifIer terminal.
atidged
Mode
E:t)
o
Chnssfs
ground
poln!
LEFT
10
REMOTE TURN·ON
Subwoofer
terminal
01
head unit
o
D
c::J
FUSE
I
Battery
I
SPEAKER
IMPEDANCE
4-8 OHMS
Mmine MOSFET Amplifier User's Manual -
page'
2
terminal
ot head unit
Connecllhe
Negative
(-J
terminal
of
rhe LEFT
subwoofer
10
the CH2(·) amplifier terminal.
Connect the Pos/lVa
(+)
terminal
of
the
LEfT
subwoofer
10
the
CH1(+J
amplifier tarmlfl8.l.
Power
and
Speaker
Wiring
4-Channel
Amplifier
MR250.4
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.
Component
values
for
SPEAKER
6dB
Passive
Crossover
IMPEOANCE
elli
••
ls
ground
point
MINIMU
SPEAKER
IMPEDANCE
40HM9
SPEAKER
IMPEDANCE
80HMS
Marino MOSFET Amplltier User's Manual - P'lIIe
13
470uF
330uF
330uF
220uF
o
o 0
I
Battery
I
lo
REMOTE
nJRN-QN
term!nal
of
head
unit
7.5mH
6.5mH
5.5mH
4/111-1
FUSE
FREOUENCY INDUCTOR CAPACrrOR
80 Hz
100 Hz
120 Hz
150 Hz
80HMS
Tri~Mode