Soundstream Technologies 555, 255, 355 specifications Sensitivity

RUBITM (Rapid- --Use Branched jmpulse) This new proprietary power supply topology eliminates “power sags” during low frequencyrepro- duction by rapidly increasing the duty cycle, stabilizing the power sup- ply and allowing it to deliver the power required when reproducing low frequencies. Also, greater reserve gate power is stored for low volt- age situations that occur during extreme conditions.

STACTTM (STabilized Apex Qrrent _Topology) Reduces power sup- ply stress by 50%. Typical designs degrade the stereo image due to phase reversal of even-order harmonic distortion that occurs between the inverted channels. In the STACT design, inversion is done at the power amplifier drive stage. Since the fully symmetrical power ampli- fier produces no even-harmonic distortion itself and all preamplifier circuitry is run completely in-phase, no even harmonic distortion phase reversal occurs.

TridentTM Protection Topology provides three types of protection:

1.Output protection against short circuits or improper loads.

2.Ground fault detection: Shuts down the amplifier when a significant voltage (~5 Volts) fluctuation occurs between electrical (turn-on lead) and battery ground.

3.Thermal Protection: Puts the amplifier into thermal rollback or shuts the amplifier down in extreme thermal conditions.

Hawkins Bass Control provides a focused subwoofer boost (O-9 dB at 45 Hz) and routes otherwise wasted amplifier power back to the audible bandwidth.

Harmonic Bass AlignmentTM The 2nd and 3rd order harmonic peaks are critically aligned to fundamental peaks at low frequencies. This produces tighter, more accurate bass reproduction.

Drive Delay llTM Amplifier section powers up 2 to 3 seconds after the power supply eliminating turn-on pops. Turn off process is reversed: Amplifier section turns off first, followed by the power supply.

Dynamically Optimized Power Grid TM Power grid is evenly distrib- uted between primary and secondary power supplies, providing greater dynamics and improved RF filtering.

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ChassisinkTM All transistors are ideally located and sandwiched be- tween the circuit board and the heatsink to provide cool efficient ampli- fier operation.

Differentially Balance RCA Input eliminates ground loop related noise in the audio path.

Continuously Variable Crossover Networks (355 & 555): 12 dB/ Octave 2-way highpass crossover, variable from 65 to 220 Hz and 24 dB/Octave lowpass crossovers variable from 30 to 120 Hz. 555 on/y

-12 dB/Octave 3-way crossover which can be selected for mid-bass (65 to 500 Hz) or midrange (65 to 4,000 Hz) operation.

Built-in Staggered S.I.P. Crossover Network (255) Built-intwo-way electronic crossover is designed to send high pass information to channels 1-4 of the amplifier and send low pass to channel 5 of the amplifier. 12dB/oct Highpass and Lowpass crossovers.

Flexible Stereo1 Input Level Control allows 200 mV to 5 V input

sensitivity.

Symmetrical Discrete Balanced Class A Drive Boards Auto-ad- just for linear performance while driving low impedance loads.

Removable Front Spoiler allows for stealth installation of RCA, Speaker and Power wiring.