Soundstream Technologies 644s, 414s User Manual
REFERENCE
414s
644s
4/3/2
Channel
Power Amplifiers
OWNER’S MANUAL
AND
INSTALLATION GUIDE
SOUNDSTREAM
_
TECHNOLOGIES
l
om*o
CONGRA
YOU now own
uncompromising design and engineering philosophy. Your Soundstream
REFERENCE 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
Model and Serial
Dealer’s Name
Date of Purchase
Installation Shop
TULA TIONS!
a REFERENCE Amplifier, the product of an
will help protect your investment.
#
TABLE OF CONTENTS
Design Features ....................................................
Reference41 4s Diagram........................................
Reference644s
High Power/Auto High
Selecting Input Modes..
Balanced / Unbalanced Input
Wiring & Wiring
Installation and Mounting
Level Setting (Reference414s)
Level Setting (Reference644s)
Diagram..
Diagram ................................................ 13 -14
......................................
CurrentTM
.........................................................
.......................................................
Power Supply Design.
(Reference644s) .....................
..............................................
..............................................
4 - 5
6 - 7
8 - 9
..... 10
11
12
15
16
17
Installation Date
Crossover Adjustments .........................................................
A/RBASSTM
Sample Systems
Troubleshooting
Service ..................................................................................
Protection Circuitry.
Specifications ................................................................
2
...........................................................................
............................................................
..................................................................... 26
...............................................................
3
20 - 25
26
27
.......
27
18
19
DESIGN FEATURES
l Uncompromising Design and Construction including
epoxy circuit boards and high current custom gold-plated solid brass
connections that will accept up to 4 gauge power/ground wire.
l Auto High
automatically
CurrentTM -
Soundstream’s exclusive circuit which
customizes your amplifier to its particular
application-High Current, low impedance loads (multiple subwoofers.
less than 2 ohms mono) or High Power, higher impedance loads (2
ohms mono and up).
l Coherent StereoTMIMixed Mono selection for either “pure” stereo
operation or mixed mono for simultaneous stereo and mono.
l
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
ChassisinkTM
l
PowerGridTM
to ensure cool, efficient amplifier operation.
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.
. Ultra-Low ESR Capacitance Bank Multiple small input power
capacitors are used to provide lower ESR (Equivalent Series
Resistance), which means more power in and out
9
Smart Thermal
RollbackTM -
Most amplifiers shut off when they get
too hot. In 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.
fasfer.
mil-spec
glass
.
l/2
ohm Drive Ability -
amplifier is designed to drive virtually any load-all the way down to
(Reference644s
only) The REFERENCE6445
l/2
ohm stereo (1 ohm mono).
-1
ohm Drive Ability -
(Reference414s
only) The
REFERENCE414s
amplifier is designed to drive virtually any load--all the way down to 1
ohm stereo
. Dual Discrete Class A Drive Stages
(Zohm
mono).
-Over
12 times the drive current
of most amplifiers, which maintains performance into low impedance
loads.
TM
. Drive Delay
Muted Turn-on/off Circuit - A unique circuit which
completely eliminates any amplifier-related turn-on/off noises.
. Flexible Dual Input Level Sensitivity
(Reference644s
only) accepts
2 voltage ranges; from 200 mV to 2.0 V and from 500 mV to 5.0 V.
permitbng
unit. The
mV
maximum output from the amplifier with virtually any source
Reference414s
has a single input range, varying from 200
to 5.0 V.
. Differential Balanced Input Design for added immunity to noise
caused by component and vehicle electrical system interaction when
using unbalanced RCA inputs.
. True Balanced Input (Reference644s only) for professional-quality
performance and noise cancellation. The
and
(-)
signal information for left and right channels, audio ground, and
f15
Vdc to operate the Soundstream
BLT”
6-pin
DIN plug carries
or
BLT4TM
Balanced Line
(+)
Transmitters.
.
A/RBASSTM
Upgradable - This feature allows RF remote control level
adjustment while the low pass filter on the amplifier’s internal crossover
is being used.
l Fault Monitor LED on the top panel notifies you of blown power supply
fuses.
4
l
l
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