About the Soundstream Stealth ST4.1000D
Big sound, small package
Big sound, small package
If you're in need of an amplifier that takes up liitle space but delivers a big sound, Soundstream's Stealth amplifiers can fill the bill. At about 3" deep by 7-1/2" wide, the ST4.1000D 4-channel amp will fit just about anywhere, delivering 90 watts per channel to your front and rear speakers, or up to 250 watts per channel in 2-channel mode to your subs. That's a lot of power in a tiny package.
You're in control
The ST4.1000D also features high- and low-level inputs for a variety of applications, and includes high- and low-pass filters to help you tailor your sound. And Soundstream built this amp for the long haul with its MOSFET power supply and military-spec circuit board, surrounded by an aluminum alloy heatsink and guarded by full short-circuit, thermal, and overload protection circuitry.
- 4-channel car amplifier
- 90 watts RMS x 4 at 4 ohms (125 watts RMS x 4 at 2 ohms)
- 250 watts x 2 bridged at 4 ohms
- variable high- and low-pass filters (35-250 Hz, 12 dB/octave)
- Class D amp technology
- MOSFET power supply
- preamp and speaker-level inputs
- fuse rating: 30A x 1
- 10-gauge power and ground leads recommended — wiring and hardware not included with amplifier
- dimensions: 7-1/2"W x 1.5"H x 3-1/8"D
- warranty: 1 year
- Our 60-day money-back guarantee
- MFR # ST4-1000D
What's in the box:
Soundstream Stealth ST4.1000D owner's manual
- 4-Channel Class D amplifier
- One 30A ATM fuse (installed)
- Two 8.25" Speaker-level input harnesses (with 5-pin Molex connector)
- Two 6" Line-level input harnesses (Stereo female RCAs on one end and 5-pin Molex plug on other end)
- 6" Speaker output harness (with 8-pin Molex connector)
- 6" Power harness (with 6-pin Molex connector)
- 4 Self-tapping screws (Length=5/8")
- Owner's manual
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More details on the Soundstream Stealth ST4.1000D
Features & specs
|RMS Power Output (Watts x Channels)||
90 x 4 |
|Peak Power Output (Watts x Channels)||500 x 2|
|Power at 2 Ohms (Watts x Channels)||125 x 4|
|Bridged Power (Watts x Channels)||250 x 2|
|Minimum Impedance Bridged||4|
|Minimum Impedance Unbridged||2|
|Best Frequency Response||20-30000 Hz|
|THD at Rated RMS Power||0.05%|
|Signal to Noise Ratio||70 dB|
|Low-Pass Crossover Frequency||35-250 Hz|
|Low-Pass Slope (dB/octave)||12 dB/oct|
|High-Pass Crossover Frequency||35-250 Hz|
|High-Pass Slope (dB/octave)||12 dB/oct|
|Bass Boost Frequency||N/A|
|Speaker Level Inputs||Yes|
|Parts Warranty||1 Year|
|Labor Warranty||1 Year|
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 space.
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 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.
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 output harness.
19 questions already asked
I bought this amp, because I didn't have room to install an older JL Audio amp in my truck. I have it connected to Focal speakers in the front, MB Quart in the back, and a JVC media only head unit. For the money, i think it sounds amazing. I'm very picky about sound quality and wasn't disappointed.
SoundStream Owner from PHX