Soundstream Reference Series 604 Installation Manual
REFERENCE
e.
604
Power Amplifier
OWNERS MANUAL AND
INSTALLATION GUIDE
SWNDSTREAM’
TECHNOLOGIES
CONGRA
TULA
TIONS!
TABLE OF CONTENTS
You now own the REFERENCE604 Amplifier, the product of an
uncompromising design and engineering philosophy.
Your
Soundstream REFERENCE amplifier will outperform any other
amplifier in the world.
Features
,_........__.,..,.,..,............,,..................................
: 4 -
5
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,
should 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.
REFERENCE
Power
Supply
Design . . . . . . . . . . . . . . . . .
.._.................
6
i).
Settmg
Hugh
Power/High Current
..........................................
7
Selecting
Crossover
Modes
..................................................
6
Selecting Input Modes
..........................................................
9
Setting Coherent Stereo/Mixed Mono/Bridged
Mono
..........
10
Wiring
................................................................................
11
Model and Serial #
Wiring Diagram
..................................................................
12
Dealer’s
Name
Installation and Mounting
....................................................
13
Date of Purchase
I
Level Setting.......................................................................
14
Installation Shop
Installation Date
CAUTION!
Prolonged listening at high levels may,ra$ult in hearing loss.
Even fhough
your new S@indstream
REFERENCE?04 soutids~
~l$tter than anything
@u’ve
ever heard,
exkise
caution to
prekrit h&Wn~
damage.
Crossover Adjustments
......................................................
15
Sample Systems
............................................................
16-21
Protection Circuitry & Troubleshooting
...............................
22
I
Service ...............................................................................
23
)
i.
:. )
Specifications
23
.....................................................................
2
DESIGN
FEATURES
l 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.
. High Power/High Current Capability - Soundstream’s exclusive circuitry
permits customization of your amplifier to its particular application-High
Current, for ultra-low impedance loads (multiple subwoofers, less than 2 ohms
mono) or High
Power.
for higher impedance loads (2 ohms mono and up).
. Coherent Stereo/Mixed Mono selection for either “pure” stereo operation or
mixed mono for simultaneous stereo and mono.
.
Chassisink” 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 directly sandwiched
between the circuit board and the heatsink in a design called
ChassisinkTU
to
ensure cool. efficient amplifier operation.
4
l Staggered Asymmetrical Electronic Crossover - Continuously variable
crossovers with 12 dB/octave high pass and 24 dB/octave low pass slopes.
Line outputs provide high or low pass or full range signal.
.
Pow&&id
Power Supply Design -All power supply components have the
shortest current path possible, connected by thick, wide PCB traces, which
ensures rapid, high current
delivev.
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 input capacitors are used to
prowde
low ESR (Equivalent Series Resistance), which means more
power.
faster.
. Smart Thermal Rollback - Most amplifiers shut off when they get too hot.
In
the unlikely event the REFERENCE604 reaches 65” C. it will gradually roll
back its average power
(tithout
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,
which means substantially greater output in the real world when the vehicle is
running, where voltages range from 13.2 to 14.4 volts. Dynamic capability of
the unregulated power supply is vastly greater than that of a tightly regulated
power supply.
. Fault Monitor LED on the front panel notifies you of blown power supply
fuses.
. Subwoofer Level Control - Separate adjustment of subwoofer signal from
high pass signal for greater installation flexibility
.
112
ohm Drive Ability-The REFERENCE604 is designed to be stable at any
load and is rated down to
l/2
ohm stereo (1 ohm mono).
. Four Dual Discrete Class A Drive Stages - Over six times the drive
current
of most amps, which guarantees matimum performance at all impedances.
l Drive
DslayTH Muted
Turn-on/off Circuit _ A unique circuit which completely
eliminates any amplifier-related turn-on/off noises.
. Flexible Input Sensitivity accepts voltages from
1M) mV
to 2.5 V. permitting
maximum output
with
virtually any source unit.
. Balanced Input Design (single-ended) for added immunity to noise caused
by component and vehicle electrical system interaction.
REFERENCE POWER SUPPLY DESIGN
The REFERENCE604 employs an extremely efficient unregulated pulse-width
modulated power supply. Like the rest of the REFERENCE amplifiers from
Soundstream, the 604 is rated at 12 volts but is 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 increased dynamic power capabilities
l
added continuous
powerwith
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 amplifiers can comfortably exceed their rated power for dynamic
portions of the music.
r
4 Ohm Stereo Watts
~
14.4 volts
12 volts
0
50
IW
4
INSTALLATION STEP 1
b
SETTING THE
HIGH POWER/HIGH CURRENT SWITCH
The High Power/High Current switch allows the
REFERENGE604
to be one of
two types of amplifiers: either producing maximum power at higher impedances
(perfect for satellites) or at lower impedances (usually with multiple
subwoofers).
The circuit operates by selecting a set of power supply voltage rails best suited
to your particular application.
One is a higher voltage ‘tap” optimized for high
impedance applications while the other is lower voltage designed to provide
more current. Unlike other amplifiers, Soundstream’s REFERENCE amplifiers
can be configured to drive virtually any impedance and make maximum power!
To determine the setting for your application, follow the chart below:
4 n stereo
2
R stereo
1 n Stereo
112
R stereo
(8 CJ Bridged)
(4 R Bridged) (2 n Bridged) (I R Bridged)
High Power
75x4
125x4
150x4
n/a
Watts
(150x2)
(250 x 2)
(300 x 2)
High Current
37.5 x 4
75x4
125x4
150x4
Watts
(75 x 2)
(150x2)
(250 x 2)
(300 x 2)
*NOTE: The High Power/High Current switch affects both pairs of channels of
the
REFERENCE604.
OTHER COMMENTS:
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