Soundstream Reference Series 405S Installation Manual page 4

DESIGN FEATURES
SAMPLE SYSTEM #3
4 channels of input
Uncompromising Design and Construction including mil-spec
3 channel operation with satellite to subwoofer fading
glass epoxy circuit boards and high current custom gold-plated solid
2 channels of bridged 2-way high pass, subwoofer channel in low pass
brass connections that will accept up to 4 gauge power/ground wire.
High Power/High Current Capability (Subwoofer Channel only) -
Soundstream's exclusive circuit which permits customization of your
amplifier to its particular application—high current, low impedance
loads (multiple subwoofers, less than 1 ohm) or High Power, higher
impedance loads (1 ohm and up).
TM
Coherent Stereo /Mixed Mono selection for either "pure" stereo
operation or mixed mono for simultaneous stereo and mono.
TM
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 sandwiched between the circuit board and the heatsink
TM
in a design called Chassisink to ensure cool, efficient amplifier
operation.
PowerGrid Power Supply Design - All power supply components
are located near one another, connected by thick, wide PCB traces,
which ensures rapid, high current delivery. 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 small input power
capacitors are used to provide a lower ESR (Equivalent Series
Resistance), which means more power in and out faster.
Smart Thermal Rollback - Most amplifiers shut off when they get too
hot. In the unlikely event the REFERENCE405s amplifier reaches
85° C, it will gradually roll back its average power (without 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 heatsink
reaches 95° C.
Unregulated Power Supply - 4 ohm power ratings are measured at
12 volts, meaning substantially greater output in the real world when
the vehicle is running, where voltages range from 13.2 to 14.4 volts.
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