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Soundstream
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Reference 604
Owner's Manual
13 pgs464.31 Kb0

Soundstream Reference 604 Owner's Manual

REFERENCE
e.
604
Power Amplifier
OWNERS MANUAL AND
INSTALLATION GUIDE
SWNDSTREAM’
TECHNOLOGIES
DESIGN
l Uncompromising Design and Construction including mil-spec glass epoxy
FEATURES
circuit boards and high current custom gold-plated solid brass connections that will accept up to 4 gauge power/ground wire.
. High Power/High Current Capability - Soundstream’s exclusive circuitry
permits customization of your amplifier to its particular application-High Current, for ultra-low impedance loads (multiple subwoofers, less than 2 ohms mono) or High
Power.
for higher impedance loads (2 ohms mono and up).
. Coherent Stereo/Mixed Mono selection for either “pure” stereo operation or
mixed mono for simultaneous stereo and mono.
.
Chassisink” Darlington
Power Array - Soundstream’s “overbuilding” of the
output section incorporates multiple output transistors instead of a few for faster, stronger power delivery The transistors are directly sandwiched between the circuit board and the heatsink in a design called
ChassisinkTU
to
ensure cool. efficient amplifier operation.
l Staggered Asymmetrical Electronic Crossover - Continuously variable
crossovers with 12 dB/octave high pass and 24 dB/octave low pass slopes. Line outputs provide high or low pass or full range signal.
.
Pow&&id
Power Supply Design -All power supply components have the shortest current path possible, connected by thick, wide PCB traces, which ensures rapid, high current
delivev.
The entire power supply is isolated on one side of the circuit board while the audio stage is located opposite it, guaranteeing minimal noise.
. Ultra Low
)
prowde
ESR
.-
low ESR (Equivalent Series Resistance), which means more
Capacitance Bank - Multiple input capacitors are used to
power.
faster.
. Smart Thermal Rollback - Most amplifiers shut off when they get too hot.
the unlikely event the REFERENCE604 reaches 65” C. it will gradually roll
back its average power has cooled off, it returns to full
(tithout
affecting the dynamics). Once the amplifier
power
output. If overheating should continue, a second thermal sensing protection circuit will shut off the amplifier if the
heatsink reaches 95” C.
. Unregulated Power Supply - 4 ohm power ratings are measured at 12 volts,
which means substantially greater output in the real world when the vehicle is
running, where voltages range from 13.2 to 14.4 volts. Dynamic capability of the unregulated power supply is vastly greater than that of a tightly regulated power supply.
. Fault Monitor LED on the front panel notifies you of blown power supply
fuses.
. Subwoofer Level Control - Separate adjustment of subwoofer signal from
high pass signal for greater installation flexibility
.
112
ohm Drive Ability-The REFERENCE604 is designed to be stable at any
load and is rated down to
. Four Dual Discrete Class A Drive Stages - Over six times the drive
l/2
ohm stereo (1 ohm mono).
current
of most amps, which guarantees matimum performance at all impedances.
l Drive
DslayTH Muted
Turn-on/off Circuit _ A unique circuit which completely
eliminates any amplifier-related turn-on/off noises.
. Flexible Input Sensitivity accepts voltages from
maximum output
with
virtually any source unit.
1M) mV
to 2.5 V. permitting
. Balanced Input Design (single-ended) for added immunity to noise caused
by component and vehicle electrical system interaction.
In
4
4
INSTALLATION STEP 1
b
REFERENCE POWER SUPPLY DESIGN
The REFERENCE604 employs an extremely efficient unregulated pulse-width
modulated power supply. Like the rest of the REFERENCE amplifiers from Soundstream, the 604 is rated at 12 volts but is designed to take advantage of the additional voltage available when the vehicle is running. The two major advantages of the unregulated power supply are:
l increased dynamic power capabilities
l
added continuous
Because of the dynamic properties of most music, all audio components should be able to react accordingly. Thanks to their unregulated power supplies, the REFERENCE amplifiers can comfortably exceed their rated power for dynamic portions of the music.
r
~
0
powerwith
4 Ohm Stereo Watts
higher
50
voltages (see chart below)
14.4 volts
12 volts
IW
SETTING THE
HIGH POWER/HIGH CURRENT SWITCH
The High Power/High Current switch allows the two types of amplifiers: either producing maximum power at higher impedances
(perfect for satellites) or at lower impedances (usually with multiple
The circuit operates by selecting a set of power supply voltage rails best suited to your particular application.
impedance applications while the other is lower voltage designed to provide more current. Unlike other amplifiers, Soundstream’s REFERENCE amplifiers can be configured to drive virtually any impedance and make maximum power!
To determine the setting for your application, follow the chart below:
4 n stereo
(8 CJ Bridged)
High Power
Watts
High Current
Watts
*NOTE: The High Power/High Current switch affects both pairs of channels of
the
REFERENCE604.
75x4
(150x2)
37.5 x 4 (75 x 2)
One is a higher voltage ‘tap” optimized for high
2
R stereo
(4 R Bridged) (2 n Bridged) (I R Bridged)
125x4
(250 x 2)
75x4
(150x2)
REFERENGE604
1 n Stereo
150x4
(300 x 2)
125x4
(250 x 2)
to be one of
subwoofers).
112
R stereo
n/a
150x4
(300 x 2)
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