Features - Soundstream Reference Series 604 Installation Manual

DESIGN FEATURES
Uncompromising Design and Construction including mil-spec glass epoxy
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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.
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Staggered Asymmetrical Electronic Crossover - Continuously variable
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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 ESR Capacitance Bank - Multiple input capacitors are used to
faster.
. Smart Thermal Rollback - Most amplifiers shut off when they get too hot. In
the unlikely event the REFERENCE604 reaches 65" C. it will gradually roll
back its average power (tithout affecting the dynamics). Once the amplifier
has cooled off, it returns to full power output. If overheating should continue,
a second thermal sensing protection circuit will shut off the amplifier if the
. 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 l/2 ohm stereo (1 ohm mono).
. Four Dual Discrete Class A Drive Stages - Over six times the drive current
of most amps, which guarantees matimum performance at all impedances.
Drive DslayTH Muted Turn-on/off Circuit _ A unique circuit which completely
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eliminates any amplifier-related turn-on/off noises.
. Flexible Input Sensitivity accepts voltages from 1M) mV to 2.5 V. permitting
maximum output with virtually any source unit.
. Balanced Input Design (single-ended) for added immunity to noise caused
by component and vehicle electrical system interaction.