Overview: The Soundstream Stealth-series amplifiers pack a
powerful punch from a small chassis. This mono block, Class D amplifier can
drive a subwoofer or two, without taking up a lot of space.
Power Output: The ST1.700D micro-mini amp delivers 300 watts
at 4 ohms, and 450 watts at 2 ohms, from its single output channel.
High/Low Level Input: The amp includes plug-in harnesses for
both high-level and low-level inputs. Speaker wires from the source unit can be
spliced onto the supplied high-level input harness. If you're using the preamp
outputs from the source unit, you can plug in your RCA cable into the low-level
input harness. Both harnesses have a 5-pin Molex connector that plugs into the
amp's Hi/Lo Input.
Note: If you're using the high-level input, you do not need
to run a remote turn-on lead. The amplifier will automatically turn on when it
senses an input signal.
LEDs: The amp features two LEDs to indicate the status of
the amplifier. The green LED will glow when the power to the amplifier is on.
When the red LED glows, the amplifier's protection circuitry is engaged,
shutting down the amp.
Protection Circuitry: The protection circuitry will shut
down the amplifier for the following conditions:
- Overheating: Thermal protection can be caused by too
low of an impedance or inadequate air flow around the amplifier.
- Over-/Under-Voltage: The amp will shut down if the
voltage to the amp is not within 10 to 16.8 Volts DC range.
- Short Circuit: When speaker wires become shorted to
each other or to the vehicle chassis, the amplifier will shut down.
Gain: The ST1.700D's rotary gain control lets you match the
amp's input sensitivity to the output of the source unit. The input sensitivity
range of the amplifier is continuously variable between 0.5V and 12V. A small
screwdriver (not included) is required to set the gain.
Low Pass: The amp features a 12 dB/octave low pass filter
that is constantly engaged. The cutoff frequency can be set between 35Hz and
250Hz using the rotary control.
Sub Sonic Filter: The Sub Sonic filter removes ultra-low
frequencies that cannot be reproduced by most subwoofers. These frequencies do
not become sound, but unnecessary oscillations which affect sound by causing
distortion. These frequencies also waste amplifier power and can cause damage to
speakers. The filter's crossover point is variable from 10 to 50 Hz. (No slope
is given for the Sub Sonic filter.)
Bass Boost: The Bass Boost enhances the low frequency
response of the amplifier. You can dial in up to +12dB of boost, centered at 45
Hz, using the rotary control.
Molex Connections: The Soundstream ST1.700D uses compact
Molex connectors which plug into the amplifier for the amp's input, speaker
output, and power/ground/remote turn-on connections.
Power: The Power/Ground/Remote harness contains two 16-gauge
red +12V power wires. These should both be spliced to your power wire (not
included) which runs from the amp to your battery. You should use at least a
10-gauge power wire to the battery, with an in-line 30A fuse no more than 18"
from the battery terminal.
Ground: Like the power wires, there are two 16-gauge black
ground wires. Both should be spliced to a larger gauge ground wire (not
included) and attached to a metal area close to the amplifier. The ground wire
should be the same gauge as the power wire.
Note: There is also a dark blue "secondary ground" wire
in the harness. Generally, it should be connected to the main ground wire.
However, if engine noise appears in the system, the dark blue wire should be
connected to the source unit's chassis ground.
Remote Turn-On: The orange wire in the harness is for the
amplifier's remote turn-on circuit. This should be spliced to a remote wire
(18-gauge typically) that runs to the source unit. This connection is not needed
if you are connecting the amplifier to the source unit via a high-level input.
High-Level Input: If you're connecting the amplifier to a
factory head unit, or a unit that does not have preamp outputs, you should use
the amp's high-level input. Splice two of the source unit's speaker wires to the
High-Level Input harness and plug it into the amp's Molex connector.
Low-Level Input: The amp's Low-Level input harness has two
female RCA connectors that will accept the plugs of an RCA patch cable from the
head unit. The other end plugs into the amp's Molex connector.
Speaker Outputs: The amp features a speaker output harness
with connections for up to 2 speakers (or one speaker with dual voice coils).
You can use one pair (+ and -) if you only have one speaker to connect, and tape
off the other pair to prevent short circuiting. The amplifier will accept a load
with an impedance of no less than 2 ohms.
Remote Bass Boost Control: The amp is equipped with a 3.5mm
connection for the supplied Remote Bass Boost Control. The remote module can be
mounted under the dash or another location near the driver's seat. A 16-1/2'
cable connects the module to the amplifier. The Remote Bass Boost Control can
adjust the speaker output between 0dB and 18dB.