Overview: The Soundstream Stealth-series amplifiers pack a
powerful punch from a small chassis. This 4-channel, full-range Class D amplifier
can drive two pairs of speakers, or two subwoofers, without taking up a lot of
Power Output: The ST4.1000D micro-mini amp delivers 90 watts
x 4 channels at 4 ohms, and 125 watts x 4 at 2 ohms. Bridged output is 250 watts
x 2 (4 ohms).
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 two supplied high-level input harnesses. If you're using the preamp
outputs from the source unit, you can plug in your RCA cables into the two low-level
input harnesses. 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 inputs,
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 white 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 ST4.1000D's rotary gain controls let you match the
amp's input sensitivity to the output of the source unit. There are independent
gain controls for the front and rear channels of the amp. 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.
Crossovers: The amp features independent 12 dB/octave
crossovers that can be set to High-pass (HPF), Full Range, or Low-pass (LPF).
The cutoff frequencies can be independently set between 35Hz and 250Hz using
the rotary controls.
Molex Connections: The Soundstream ST4.1000D 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
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.
Remote Turn-On: The blue wire in the power 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 the source unit's speaker wires to the two
High-Level Input harnesses and plug them into the amp's Molex connectors.
Low-Level Input: The amp's two Low-Level input harness each
have 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 4 speakers. Speaker wires should be spliced onto the speaker