Soundstream Technologies 705s - Manual (Page 4)

4
DESIGN FEATURES
• Uncompromising Design and Construction including mil-spec glass epoxy 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 (subwoofer channel only) - Soundstream’s exclusive
circuitry permits customization of your amplifier to its particular application—High Current, for
ultra-low impedance loads (multiple subwoofers, less than 1 ohm) or High Power, for higher
impedance loads (1 ohm and up).
• Chassisink
TM
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 Chassisink
TM to ensure cool, efficient amplifier operation.
• Staggered Asymmetrical Electronic Crossover - Continuously variable 2 or 3-way
crossovers with 12 dB/octave high pass and 24 dB/octave subwoofer low pass. In 3-way
mode, bandpass can be selected for midrange or midbass.
• Rear Channel De-emphasis - A circuit based on theater surround technology in which rear
fill information is rolled off at 6 dB/octave with a -3 dB point at 7,000 Hz to provide a more
realistic listening experience (in 5 channel mode only).
• PowerGrid Power Supply Design - All power supply components are located near one
another, for the shortest possible current path and are 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 - 24 miniature “stiffening” capacitors ensure rapid power
delivery for dynamic peaks. Multiple small input power capacitors are used to provide a
lower ESR (Equivalent Series Resistance), which means more power, faster.
• Smart Thermal Rollback - Most amplifiers shut off when they get too hot. In the unlikely
event the Reference705s 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, which means
substantially greater output in the real world when the vehicle is running, where voltages
range from 13.6 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 a blown power supply fuse.
• 1/2 Ohm Subwoofer Drive Ability - The Reference705s' subwoofer channel is designed to