Soundstream Reference Series CLASS-A-3.0 Manuale utente

REFERE'NCE

ClassA3,O

ClassA6.0

Power Amplifiers

OWNERS MANUAL

AND

INSTALLATION GUIDE

SOUNDSTREAk”

TECHNOLOGIES

COMXA

TULA

TION’S.

You now own the REFERENCE Class A Amplifier, the product of an

uncompromising design and engineering philosophy. Your Soundstream

REFERENCE Class A 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 and installation receipts for future

reference.

Soundstream amplifiers are the result of American craftsmanship and

the highest quality control standards, and when properly installed, 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

TABLE OF CONTENTS

Features ............................................................................ 4-5

REFERENCE Power Supply Design.. ...................................

Passive and Electronic Crossovers .....................................

dB/octave

Passive Crossover Chart

..................................

12 dB/octave Passive Crossover Chart ................................

Series and Parallel Wiring ....................................................

LSE.Q

Theory and

Use

..................................................

IO-I 1

Setting High Power/High Current

........................................

Setting Coherent

Stereom/Mixed

Mono/Bridged Mono

.......

Wiring..

....................................

.....................................

14-15

Wiring Diagram

..................................................................

Installation

and

Mounting....................................................

Level Setting.. .....................................................................

Protection Circuitry

Troubleshooting

...............................

Service ...............................................................................

Specifications .....................................................................

i-l,OH

CURRENT I

HIGH

POWEI

MONO I

STEREO

I MIXED MONO

DEStGN

FEATURES

Pure

Class

A”

Output Topology

for the utmost in musicality and definitive

power output. Soundstream’s uniqe design allows the Class A amplifiers to

deliver

uncomparable

sonics

or, when operated at lower impedances, to

provide phenomenal amounts of power.

Uncompromising Design

and

Construction including mil-spec glass epoxy

circuit boards and high current custom gold-plated solid brass connections

accept up to 4 gauge power/ground wire. Use of 1% metal film capacitors in

the circuit path and ultra-tight tolerance components ensure unsurpassed

maximum musicality.

High Power/High Current Capability

Soundstream’s exclusive circuit which

permits customization of your amplifier to its particular application-high

current, low impedance loads (multiple subwoofers, less than 1 ohm mono) or

High Power, higher impedance loads (1 ohm mono and up).

Coherent

Stereo?rltixed

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 Chassisink” 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.

l 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.

l Smart Thermal Rollback -Most amplifiers shut off when they get too hot.

the unlikely event the REFERENCE 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.

l 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. In addition, the

amplifier will perform with as little as 9 volts and as much as 15 volts.

l Fault Monitor LED on the front panel notifies you of blown power supply

fuses.

l/4

ohm Drive Ability

The REFERENCE Class A amplifiers are designed to

drive virtually any load-all the way down to

114 ohm stereo (112 ohm mono).

l Dual Discrete Class A Drive Stages

Over six times the drive current of most

amps, which maintains performance into low impedance loads.

l Drive

DelayTM

Muted Turn-on/off Circuit -A unique circuit which completely

eliminates any amplifier-related turn-on/off noises.

l Flexible Input Sensitivity accepts voltages from 100

to 2.5 V, permitting

maximum output from the amplifier with virtually any source unit.

l Balanced Input Design for added immunity to noise caused by component

and vehicle electrical system interaction.

LSE.Q

(Class A 6.0) fully adjustable subwoofer equalization circuit providing

frequency and

IeveP’Q”

adjustment for optimum subwoofer performance. An

adjustable subsonic filter protects woofers from damaging low frequency

information and maximizes output in a usable range.

REFERENCE POWER SUPPLY DESIGN

The REFERENCE Class A amplifiers employ an extremely efficient unregulated

pulse-width modulated power supply. REFERENCE Class A amplifiers from

Soundstream are rated at 12 volts but are designed to take advantage of the

additional voltage available when the vehicle is running. The two major

advantages of the unregulated power supply are:

l awesome dynamic power capabilities

l added continuous power with higher voltages (see chart below)

Because of the dynamic properties of most music, all audio components should

be able to react accordingly. Thanks to their unregulated power supplies, the

REFERENCE Class A amplifiers can comfortably exceed their rated power for

dynamic portions of the music.

4 Ohm Stereo Watts

,4.

,ohtn

Power

26,

in&&&

a:@ 12

vqts

iaji&&

x 2

14.4

volt!3

(REFERENCE

Class

4~3.0

,shown)

dB/OCTAVE

PASSIVE CROSSOVER CHART

____

/’

6 dB/octave hiuh pass

dB/octave low pass

KEY

L = high quality (DCR

1 ohm) inductor/coil

C = non-polarized 50 v (or greater) capacitor

FREQ.

80 Hz

100 Hz

130 Hz

200 Hz

260 Hz

400 Hz

600 Hz

800

1000 Hz

1200 Hz

1800 Hz

4000 Hz

2 ohms

4.1

3.1

2.4

1.6 mH

1.2mH

0.8

0.5

0.41 mH

0.31

0.25

0.16

0.08

1000

800

600

p!=

400

300

pi=

200

136

lOOpl=

4 ohms

8.2

6.2

4.7

3.3 mH

2.4

1.6mH

l.OmH

0.82

0.62

0.51

0.33

0.18

500

400

300

200

15op!=

1oop.F

lOId=

8 ohms

12mH

6.8

4.7

3.3

2.0

1.6 mH

1.2 mH

1.0 mH

0.68

0.33

250

200

ISOpF

1oopF

16ti

lOti

5cIF

dB/OCTAVE

PASSIVE CROSSOVER CHART

dB/octave

hioh

L)ass

FREQ.

80 Hz

100 Hz

130 Hz

200 Hz

280 Hz

400 Hz

600 Hz

800 Hz

1000 Hz

1200 Hz

1800 Hz

4000 Hz

dB/octave

low

Pass

KEY

= high quality (DCR

1 ohm) inductor/coil

Cl = non-polarized 50 v (or greater) capacitor

2 ohms

5.5

4.7

3.3

2.2

1.8

1.1

0.75

0.5

0.47

0.33

0.27

0.10

680

560

400

300

200

15opF

IOOpF

15fi

4 ohms

9.1

6.8

4.7

3.6

2.2

1.5 mH

1.0 mH

0.9

0.75

0.50

0.22

330

270

200

15opF

IOOpF

kJ=

15P

6.8

p!=

8 ohms

22 mH

18 mH

15 mH

9.1

6.8

4.7

3.0

2.0

1.8 mH

1.5

1.0 mH

0.47

18Op!=

15op!=

IOOpF

PJ=

15fi

13PJ=

6.6

3.3

SERIES AND PARALLEL

WIRING

Below are examples of series and parallel wiring configurations. Please note

how the impedances differ with the different configurations.

Amplifier

2-4

ohm drivers in parallel

ohms

Amdifier

4Oh;

4 Ohm

2-4

ohm drivers in series

ohms

..‘14‘

4-4

ohm drivers in parallel

ohm

LSE.Q THEORY AND USE

LSE.Q

a unique subwoofer

control circuit included with the

SOUNDSTREAM REFERENCE

Class A 6.0 amplifier. It is capable of

removing

subsonic

energy

program material. The circuit

consists of two controls. One adjusts

the frequency of operation and the

other adjusts the range of boost.

With both controls adjusted fully

counter-clockwise, no boost is

applied and the amplifier is flat in

response down to 20 Hz.

The frequency control (Hz) adjusts

the starting point of the subsonic

filter. This high pass filter can be

adjusted from 20 Hz up to a

maximum of 60 Hz. This control is

useful for setting the lowest

frequency that your subwoofer will

see. (See figure 1)

LSEQ

FREQ

BOOST

FIG. 1

LSE.Q

The Qcontrol adjusts the amount of

boost applied at the set frequency.

This is adjustable from

.707

(flat) to

2.6

(+9

dB).

(See figure 2)

-5

-10

-15

-20

-25

-33

FIG. 2 Variable

‘Q

When the

is set to

.707

(Butterworth),

LSE.Q

acts as a sub-

sonic filter only. (See figure 3)

-10

-15

-20

-25

hww'(W

IW MO

FIG. 3 Variable High Pass

The simple act of removing the signal

below the vented tuning frequency can

improve system output by as much as

dB.

With

values greater than

.707,

boost is added in addition to the

sub-sonic filter. (see figure 4)

-10

FW.WW

200

FIG. 4 Variable

‘Q

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