Soundstream ST4.1000D is a car audio amplifier for an aftermarket vehicle audio installation. Match the specifications, connections and mounting requirements below to your system before ordering.

• Brand: Soundstream
• Manufacturer part number: ST4.1000D

Key specifications

• Max Power: 1,000 Watts
• RMS Power 4Ω: 90W x 4
• RMS Power 2Ω: 125W x 4
• Amplifier Size: 3″W x 1.50″H x 6.5″L

Features and installation details

Stealth Series 4Ch Micro-Amp

When you first encounter the Soundstream Stealth Series ST4.1000D, you’ll be surprised by its small size, but don’t let its compact form fool you. This amplifier is the epitome of Class D full-range technology, packing a remarkable amount of power into a less than 2-pound chassis. Despite its size, the ST4.1000D delivers impressive performance, ensuring that you get all the power you need without compromising on space.

Class D Technology: Small in Size, Big on Power

The ST4.1000D uses the latest in Class D amplifier technology, once considered “dirty power” due to its high-efficiency nature. However, modern Class D amplifiers have evolved, offering stable performance while maintaining maximum efficiency and low power tolerance. The ST4.1000D is designed to provide clean power that rivals traditional full-range amplifiers, while requiring minimal power consumption. This makes it perfect for car audio systems, motorcycles, boats, and off-road vehicles where space and efficiency are crucial.

Compact Design with Maximum Efficiency

Despite its small size, the ST4.1000D delivers a substantial 1000W peak power output and stable RMS power for your audio setup. Whether you’re powering multiple speakers or a subwoofer, this amplifier has you covered. Its ultra-micro footprint allows for easy installation even in tight spaces without compromising on sound quality.

The Class D design ensures high power efficiency and prevents excessive heat build-up, allowing you to run the amplifier continuously without worrying about overheating. Even after hours of high-volume playback, the ST4.1000D remains cool and efficient, making it the ideal choice for long road trips or extended listening sessions.

Automatic Hi-Level Signal Sensing Turn-On

Installing an amplifier should be easy, and with the ST4.1000D, it is. Whether you’re using a factory radio or an aftermarket head unit, this amplifier comes equipped with an automatic Hi-Level Signal Sensing Turn-On feature. There’s no need for a separate remote wire—the ST4.1000D automatically detects the audio signal from your head unit and powers on and off accordingly. This feature simplifies the installation process and reduces the amount of wiring needed, making it perfect for both experienced installers and DIY enthusiasts.

Key Features of the Soundstream Stealth ST4.1000D:

• 1000W of Peak Power Output: Compact design provides ample power for full-range speakers and subwoofers.
• Class D Technology: Efficient, high-performance amplifier with low power consumption and minimal heat generation.
• Automatic Hi-Level Signal Sensing Turn-On: Eliminates the need for a remote wire—automatically powers on/off with the signal.
• Compact, Space-Saving Design: Ideal for tight installations in cars, motorcycles, boats, and off-road vehicles.
• Stabilized Performance: Delivers clean and stable audio output even at high volumes, ensuring no distortion.
• Easy Installation: With RCA and Hi-Level inputs, this amplifier can be integrated with factory or aftermarket head units.
• Cool Operation: Remains cool even during continuous high-volume use, ensuring reliable long-term performance.
• Versatile Applications: Perfect for car audio systems, motorcycle audio, boat audio, and more.

Power and Efficiency in One Compact Package

The ST4.1000D is a 4-channel amplifier that can power multiple full-range speakers or a combination of speakers and a subwoofer. With RMS power ratings of 90W x 4 at 4Ω and 125W x 4 at 2Ω, this amplifier is suitable for a variety of audio setups. Whether you are looking for high-quality sound for your car or need a powerful amplifier for your motorcycle or boat system, the ST4.1000D delivers.

Designed for Performance

Soundstream's ST4.1000D amplifier is engineered for audiophiles who require both power and efficiency. Its Class D technology ensures that it delivers top-notch sound quality without drawing excessive power, which is a key feature for systems that need to conserve energy. The ST4.1000D excels at keeping the audio clear, crisp, and distortion-free, even when pushed to high volumes.

Whether you’re upgrading your car’s audio system or installing a powerful setup in a motorcycle or boat, the Soundstream Stealth Series ST4.1000D is the amplifier that meets your needs for high-performance audio in a compact design.

In Summary:

• 1000W peak power with 4 channels of output for driving multiple speakers and subwoofers.
• Class D technology offers high efficiency and minimal power consumption.
• Automatic Hi-Level Signal Sensing Turn-On for easy installation with no remote wire required.
• Compact design fits in tight spaces without sacrificing sound quality.
• Stable performance for clear, distortion-free sound even at high volumes.
• Perfect for a variety of applications including car audio, motorcycle audio, and boat audio systems.

Stealth Amplifier Features:

High-Efficiency Class D Full-Range Amplifiers

Hybrid Aluminum Alloy Heatsink for Optimum Dissipation

2-ohm Stereo & 4-ohm Bridged Full-Range Operation

MOSFET Power Supply w/ Audiophile Grade IRTM Transistors

Military Grade SMT PCB Maintains Dynamic Performance

Direct Short, Thermal, & Overload Circuits Protect Amplifier

200mV-12V High Level or Low-Level RCA Input

Automatic Turn-On Hi-Level Signal Sensing

Quick Disconnect RCA/High-Level Wire Harness

Quick Disconnect Power and Speaker Output Harness

Variable 12dB High Pass, Low Pass, & Subsonic Crossovers

Amplifier Dimensions 3"W x 1.5"H x 6.5"W

Stealth Amplifier Owners Manual [.PDF]

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