Soundstream Technologies 702 Manuale Utente

 

 

 This new proprietary power sup-

ply topology eliminates “power sags” during low frequency reproduction
by rapidly increasing the duty cycle, stabilizing the power  supply and
allowing it to deliver the power required when reproducing low frequen-
cies. Also, greater reserve gate power is stored for low voltage condi-
tions that occur during extreme conditions.

 

 

 

 

 Reduces power supply

stress by 50%. Typical designs degrade the stereo image due to phase

reversal of even-order harmonic distortion that occurs between the in-

verted channels. In the STACT design, inversion is done at the power
amplifier drive stage. Since the fully symmetrical power amplifier pro-
duces no even-harmonic distortion itself and all preamplifier circuitry is

run completely in-phase, no even harmonic distortion phase reversal

occurs.

 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   

 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   Fully adjustable subwoofer equalizaton circuit
providing frequency and boost (“Q”) adjustment for optimum subwoofer
performance. A frequency tracking subsonic filter protects woofers from
potentially 

 low frequency information and maximizes output in

a usable range.

The 2nd and 3rd order harmonic peaks

are critically aligned to fundamental peaks at low frequencies. This
produces tighter, more accurate bass reproduction.

Amplifier section powers up 2 to 3 seconds after the

power supply eliminating turn-oncand off pops. The turn off process is
reversed: Amplifier section turns off first, followed by the power 

4

Output Clipping Indicators indicate clipping on the output stage of
the amplifier. Monitoring the clipping indicators allows the user to achieve
maximum Sound Pressure Level without clipping the amplifier.

Dynamically Optimized Power Grid

Power grid is evenly distrib-

uted between primary and secondary power supplies, providing greater
dynamics and improved RF filtering.

automatically matches the amplifier to the load

being driven allowing greater system flexibility, greater output, higher
reliability, and high efficiency 1 ohm (stereo) operation.

 All transistors are ideally located and sandwiched be-

tween the circuit board and the 

 to provide coo

fiea operation.

Differentially Balanced RCA Input eliminates grou
noise in the audio.

efficient 

 loop related

 DIN Input for professional-quality performance

and noise cancellation. The 6-pin DIN plug carries 

 signal informa-

tion for Left and Right channels, audio ground,  and 

Vdc to operate

the Soundstream BLT   BLT4 Balanced Line Transmitters.

Continuously Variable Crossover Networks: 12 

 

variable from 70 to 160 Hz, and 24 

 

 crossovers vari-

able from 55 to 220 Hz.

Flexible Dual Input Level Control allows 300 

 to 5 V input sen-

sitivity Separate Left and Right level controls allow user to optimize
system level control.

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

Removable Front Spoiler allows for stealth installation of RCA, Bal-

anced Line, Speaker and Power wiring.