4
INSTALLATION STEP 4
b
COHERENT
STEREOIMIXED-
MONO/BRIDGED MONO
The REFERENCE604 has the ability to operate in any of the following modes:
Coherent Stereo with identical
IeR
and right stereo channels for maximum
fidelity. Best choice for satellite speakers. Use this mode unless Mixed-Mono
is necessary.
Mixed-Mono in order to drive stereo and mono simultaneously; works well for
center channels. It can be used anytime you need a summed mono channel.
Somewhat sacrifices sonic accuracy as additional circuitry is introduced to one
channel.
in
Mixed-Mono, the
left
channel is inverted; see
diagram
below
or
on the bottom of the amplifier.
Bridged Mono for dedicated single channel operation: ideal for driving
subwoofers.
It is also used when large amounts of power are necessary for
single speakers.
In
bridged
mono, only the right channel input (per pair of
channels) is active.
BRIDGED MONO
COHERENT STEREO
INSTALLATION STEP 5
WlRlNG
POWER AND GROUND
To assure maximum output from your REFERENCE604, use high quality. low-
loss power and ground cables. The REFERENCE604 will accept up to 4 gauge
power and
ground
cables. Using a 4 gauge cable is ideal, however, 6 gauge is
acceptable when the amplifier is mounted near the power source. 4 gauge is
capable
of delivering more power
to
the
amplifier,
and the more
power
you
get into the
amg,
the more you get
ootl
Determine from the
charl
below the
)
”
mmmwm
gauge power and ground wire for your application.
up
to
i0’
up
to
20’
REFERENCE604
Soundstream
Power40
Soundstream
Power40
or
Power80
(4
9a.j
(4
OT
8
ga.)
CIRCUIT BREAKERS/FUSES
EXTERNAL
Like all car audio amplifiers, the REFERENCE604 must be fused near the
battery. A fuse or circuit breaker must be located within
18”
of the battery. This
will prevent a fire in the event of a shorted cable. The value of the circuit
breaker or fuse should be 70 - 100 amps.
INTERNAL
The REFERENCE604 is fused internally with two 30 amp automotive-type
fuses. In the event of blown power supply fuses, the “Fault” indicator on the
front panel will light. The fuses are accessible via a plastic plug on the
bottom
of the amplifier. Never replace the fuses
with
a higher value than what is
supplied.
This
may
resu/t
in amplifier damage and
will
void the
warranfyi
REMOTE TURN-ON
Connect the ‘Remote” to the turn-on lead from the source unit. When
+12
volts
is received, the amplifier will turn on.
SIGNAL CABLE
Depending on your application, you may use one or two pairs of signal cables to
1
drive your
REFERENCE604.
Use a high-quality cable that will be easy to install
and has minimal signal loss to guarantee optimum performance.
Soundstream’s
DL.1
and
SL.1
are ideal.
(Continued on page
12)
11
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