Soundstream Technologies 404s owner manual Design Features, Sample System #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.

∙Auto High Current™ - Soundstream’s newest exclusive circuit which automatically customizes your amplifier to its particular application— High Current, low impedance loads (multiple subwoofers, less than 2 ohms mono) or High Power, higher impedance loads (2 ohms mono and up).

∙Coherent StereoTM/Mixed Mono selection for either “pure” stereo operation or mixed mono for simultaneous stereo and mono.

∙ChassisinkTM 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 in a design called ChassisinkTM 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 REFERENCE404s 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.

SAMPLE SYSTEM #4

2 channels of high pass input with 2 channels of stereo output

2 channels of stereo low pass input with 1 bridged channel of output

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