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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.
l Auto High
CurrentTM
-
Soundstream’s exclusive circuit which
automatically
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
to ensure cool, efficient amplifier operation.
l
PowerGridTM
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
fasfer.
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.
l Fault Monitor LED on the top panel notifies you of blown power supply
fuses.
4
.
l/2
ohm Drive Ability
-
(Reference644s
only) The REFERENCE6445
amplifier is designed to drive virtually any load-all the way down to
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
(Zohm
mono).
. Dual Discrete Class A Drive Stages
-Over
12 times the drive current
of most amplifiers, which maintains performance into low impedance
loads.
. Drive Delay
TM
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
maximum output from the amplifier with virtually any source
unit. The
Reference414s
has a single input range, varying from 200
mV
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
6-pin
DIN plug carries
(+)
and
(-)
signal information for left and right channels, audio ground, and
f15
Vdc to operate the Soundstream
BLT”
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.