Soundstream Technologies HRU. 4, HRU. 2 User Manual

HUMAN REIGN
UNLEASHED

HRU. 2

HRU. 4

Owner’s Manual

and

Installation Guide

Congratulations!

You now own a Soundstream Human Reign Unleashed amplifier, the
product of an uncompromising design and engineering philosophy. Your
Soundstream Human Reign Unleashed amplifier will outperform any
other amplifier in the world.

To maximize the performance of your system, we recommend that you
thoroughly acquaint yourself with its capabilities and features. Please
retain this manual and your sales receipt for future reference.

Soundstream amplifiers are the result of American innovation and the
highest quality control standards. When properly installed, they will
provide you with many years of listening pleasure. Should your amplifier
ever need service or replacement due to theft, please record the following
information which will help protect your investment.

Model and Serial #

Dealer's Name

Date of Purchase

Installation Shop

Installation Date

C A U T I O N !

Prolonged listening at extremely high levels may result in hearing loss.

Even though your new Soundstream Human Reign Unleashed

sounds
prevent hearing damage.

better than anything you've ever heard, exercise caution to

2

amplifier

Table of Contents

Design Features

Amplifier Diagram

Hawkins Bass Control™ Theory and Use

Installation: Wiring

Installation: Mounting

Installation: Level Setting

Protection Circuitry and Troubleshooting

Service and Specifications

p 4 -5

p 6 - 9

p 10 -11

p 12-13

p 14

p 15

p 16

p 17

3

DESIGN FEATURES

RUBI™(Rapid-Use Branched Impulse) This new proprietary power supply

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 to reproduce low frequencies. Also, greater reserve gate power

is stored for low voltage conditions that occur during extreme conditions.

STACT™(STabilized Apex Current Topology) 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 inverted channels. In the

STACT design, inversion is done at the power amplifier drive stage. Since the

fully symmetrical power amplifier produces no even-harmonic distortion itself and

all preamplifier circuitry is run completely in-phase, no even harmonic distortion

phase reversal occurs.

Trident™ 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

3. Thermal Protection: Puts the amplifier into thermal rollback or shuts the amplifier

down in extreme thermal conditions.

ground.

Hawkins Bass Control - Fully adjustable subwoofer equalization circuit providing

frequency and boost (“Q”) adjustment for optimum subwoofer performance. A

frequency tracking subsonic filter protects woofers from potentially harmful low

frequency information and maximizes output in a usable range.

4

Harmonic Bass Alignment™ The 2nd and 3rd order harmonic peaks are critically

aligned to fundamental peaks at low frequencies. This produces tighter, more

accurate bass reproduction.

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 distributed between

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

Chassisink™ All transistors are ideally located and sandwiched between the

circuit board and the heatsink to provide cool efficient amplifier operation.

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

Flexible Input Level Control allow 300mV to 5V input sensitivity.

Continuously Variable Crossover Network : 12dB/octave for the highpass

section and 24dB/octave for the lowpass section.

5

- HRU. 2 -

Front View

Top View

6