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Soundstream ST4.1200D Stealth Series 1200W Class D 4 Channel Amplifier

4.2 4.2 out of 5 stars 581 ratings

$122.80 $61.40 per Item
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Item dimensions L x W x H 7.75 x 3 x 1.5 inches
Voltage 12 Volts
Manufacturer Soundstream
Mounting Type Surface Mount
Brand Soundstream

About this item

  • Stealth Series 1200W class D 4 channel amplifier RMS power 4Ω: 100X4/ RMS power 2ω: 150X4/ bridged 4Ω: 300X2 2-Ohm stereo &
  • 4-Ohm bridged full-range operation Hybrid aluminum alloy heatsink for optimum dissipation Military grade SMT PCB maintains dynamic performance
  • Package dimensions: 7.75" L x 3.0" W x 1.5" H
  • Country of Origin: CHINA

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Soundstream ST4.1200D Stealth Series 1200W Class D 4 Channel Amplifier
Soundstream ST4.1200D Stealth Series 1200W Class D 4 Channel Amplifier
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  • Amplifier^Remote^Wiring^Hardware^Manual

  • Product Description

    Soundstream ST4.1200D Stealth Series 1200W Class D 4 Channel Amplifier

    2

    4

    Once regarded as “dirty power”, class DS stable performance, thanks to high power capability, maximum efficiencies and low tolerance components, rivals traditional full range applications.

    5

    The latest and greatest of class d full range technology allows us to Pack 10 lbs in less than 2 lbs chassis.

    6

    Minimal power requirements, Ultra micro Footprint, unbelievable sound quality, and easy install make Stealth amplifiers great for any car, Motorcycle, boat, or off-road vehicle.

    3

    Looking for specific info?

    Product information

    Warranty & Support

    Product Warranty: For warranty information about this product, please click here. [PDF ]

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    Customer reviews

    4.2 out of 5 stars
    581 global ratings

    Review this product

    Share your thoughts with other customers

    Customers say

    Customers appreciate the sound quality, amp quality, and fit of the electronic component amplifier. They find it loud and a good fit for motorcycles. Many like the value for money and power it provides. However, some have issues with its sturdiness. Opinions vary on functionality and ease of installation.

    AI-generated from the text of customer reviews

    48 customers mention "Sound quality"36 positive12 negative

    Customers appreciate the amplifier's sound quality. They find it loud and clear, with no distortion when turned up. The amp runs 4 ohm stereo and 4 ohm bridged mono speakers well.

    "...I can easily hear my music doing 80 down the freeway! It has been installed for 1 year at this point, with no issues." Read more

    "Installed this in a Harley road glide the size is perfect and sounds good seen some reviews about not working under 2ohm load but it works great for..." Read more

    "I bought the amp paired with the Sony AX7000 easy and sounds great." Read more

    "...Amp is crystal clear and has plenty of power to spare for 4 - 4 ohm 6.5" speakers!" Read more

    29 customers mention "Amp quality"24 positive5 negative

    Customers like the amp quality. They say it's a great amp when it works, with good grounding and large gauge speaker wire. Some find it powerful and clear, especially for motorcycles. The 2 channel amp gives a good kick, and it never skips a beat. However, some customers report interference issues.

    "...Instructions are not the best, but product is great ." Read more

    "I am amazed how clear and powerful this little amp is...." Read more

    "...No noise, turn on pop / thump, or alternator whine. It's quite...." Read more

    "This amp performs amazing and easy to use only reason it’s not 5 stars was due to the instructions not being very clear to hook up...." Read more

    22 customers mention "Fit"20 positive2 negative

    Customers like the fit of the amplifier. They say it's the perfect size, easy to install, and a definite value. The footprint is nice and small, easily fits anywhere in the fairing, under seats, gloveboxes, or rear decks. It works perfectly in a compact environment and is a great amp for its size. Some mount the amp under the passenger seat using heavy-duty 3M two-sided mounting tape.

    "Installed this in a Harley road glide the size is perfect and sounds good seen some reviews about not working under 2ohm load but it works great for..." Read more

    "Works great and easy to fit under the faring of my Harley" Read more

    "...Very small, very efficent, very good sound quality and with a nice adjustable crossover and gain control too...." Read more

    "...series is super convenient if space is an issue, and will easily fit under a seat, glovebox or rear deck of a car...." Read more

    9 customers mention "Value for money"9 positive0 negative

    Customers appreciate the value for money of this product. They find it offers a lot of power for the price and are pleased with the quality considering the cost.

    "...He is impressed with the quality for the price. I would have given it 5 stars if the installation document had been correct...." Read more

    "Price point was good but I guess you get what you pay for...." Read more

    "...It’s the perfect size, easy install, and a definite value." Read more

    "Fantastic product for the price pair them with the right rms rating and they sound great" Read more

    8 customers mention "Power"8 positive0 negative

    Customers appreciate the amplifier's power. They mention it has a lot of power with great sound, good value, and clean power. The Class D design pulls low power, making it perfect for bikes, yet still packs enough power for 4 speakers.

    "...Amp is crystal clear and has plenty of power to spare for 4 - 4 ohm 6.5" speakers!" Read more

    "...Sounds great. Plenty of power and a night/day difference in the factory amp...." Read more

    "...in volume, no more distortion when turned up loud, and plenty of power for this setup. Bike sounds like an amphitheater now...." Read more

    "...The sound quality of the amp is great. Class D pulls low power making it perfect for bikes." Read more

    32 customers mention "Functionality"16 positive16 negative

    Customers have mixed opinions about the product's functionality. Some say it works well and has no issues, while others report problems like fuses blowing, speakers not coming on for 2-5 minutes, and the amp malfunctioning after a short period of use.

    "Using 4 on different cars. 3- 2.5 years total, no issues yet. Instructions are not the best, but product is great ." Read more

    "...After 2 months it just died and constantly blows the onboard fuses. In my younger days I was an MECP tech so I assure you it’s not me...." Read more

    "Works great and easy to fit under the faring of my Harley" Read more

    "...I almost returned it as defective because it would not power up...." Read more

    25 customers mention "Ease of installation"16 positive9 negative

    Customers have different experiences with the installation of the electronic component amplifier. Some find it simple and convenient for space-saving purposes, while others mention issues with the instructions, incorrect speaker wiring diagrams, and power issues.

    "This amp performs amazing and easy to use only reason it’s not 5 stars was due to the instructions not being very clear to hook up...." Read more

    "...The stealth series is super convenient if space is an issue, and will easily fit under a seat, glovebox or rear deck of a car...." Read more

    "...3- 2.5 years total, no issues yet. Instructions are not the best, but product is great ." Read more

    "...Wish it would've cam with instructions but everything is pretty easy to figure out. The plugs do seem a bit cheap but they work so." Read more

    5 customers mention "Sturdiness"0 positive5 negative

    Customers are unhappy with the sturdiness of the product. They report that it breaks within a few days, the harness for the speaker output starts coming apart, and the flimsy RCA plug already broke. The slightest vibration can cause it to break.

    "...My only complaint is the harness for the speaker output has started coming apart three wires pulled out of there crimped connectors need a new..." Read more

    "...It has very tiny wires and the slightest vibration will cause it to break. Do not recommend. I can't find replacements anywhere either." Read more

    "...I had destroyed my factory wiring harness to install it, so after soldering it all back together, spent a couple more hours putting my dash back..." Read more

    "lasted all of 5 minutes before crackling and popping. replaced with thor hyfonics, everyhting sounds great now." Read more

    Whole lot of power for little bit of price.
    5 out of 5 stars
    Whole lot of power for little bit of price.
    Got this amp for my Harley Roadglide. It was a tight fit but it’s in there. I tried it out before tucking it away and it sounds amazing. I could have gotten away with the 1000w 2 channel but went ahead with the 4 in case I run more speakers in the future. It’s powering a set of DS18 loud speakers and they rock!!! Wiring and set up was a breeze. All you need is wire and connectors. Will send sound video later
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    Top reviews from the United States

    • Reviewed in the United States on January 14, 2025
      Installed this in the fairing of my 2017 Road Glide. I paired the amp with some JBL speakers. The system sounds great, no static issues, and was easy to tune. I can easily hear my music doing 80 down the freeway! It has been installed for 1 year at this point, with no issues.
      2 people found this helpful
      Report
    • Reviewed in the United States on February 13, 2025
      Installed this in a Harley road glide the size is perfect and sounds good seen some reviews about not working under 2ohm load but it works great for me speakers sound great
      2 people found this helpful
      Report
    • Reviewed in the United States on December 17, 2024
      Using 4 on different cars. 3- 2.5 years total, no issues yet. Instructions are not the best, but product is great .
    • Reviewed in the United States on December 15, 2023
      Don’t waste your time or money unit doesn’t sound great. I was trying to save money so I decided to put up with its less than perfect sound. After 2 months it just died and constantly blows the onboard fuses. In my younger days I was an MECP tech so I assure you it’s not me. Spend the money on a better unit as I am now.
    • Reviewed in the United States on August 12, 2024
      I bought the amp paired with the Sony AX7000 easy and sounds great.
    • Reviewed in the United States on April 22, 2024
      I am amazed how clear and powerful this little amp is. I was worried about quality with the price, but damn this thing is absolutely rocking the 4 6.5's on my 2018 street glide with the gains under half way up. I would highly recommend this amp to anybody with limited space looking for best bang for your buck. Amp is crystal clear and has plenty of power to spare for 4 - 4 ohm 6.5" speakers!
      3 people found this helpful
      Report
    • Reviewed in the United States on January 14, 2025
      Works great and easy to fit under the faring of my Harley
      One person found this helpful
      Report
    • Reviewed in the United States on October 13, 2022
      Installed it in my truck a couple years ago, powering 4 x Kicker CSC68's and worked flawlessly for 2 years...now each time I start my truck the speakers won't come on for 2-5 minutes, and then cut in and out for a few minutes, then it works normally. If I turn off my truck, then turn it right back on, starts doing it again. Buying a second one now since there's virtually no significant warranty period and so I don't have to re-do the install. Hope the next one lasts longer.

    Top reviews from other countries

    Translate all reviews to English
    • Client d'Amazon
      5.0 out of 5 stars parfait
      Reviewed in Canada on December 6, 2024
      installer sur moto flhx dans le fairing
    • Brian F Binnie
      5.0 out of 5 stars Ride and ride
      Reviewed in Canada on May 10, 2024
      Son loves it on his Harley
    • Amazon Customer
      5.0 out of 5 stars Small but packs a punch
      Reviewed in Canada on May 2, 2020
      The media could not be loaded.
      Bought this little amp for a ‘72 International Scout II as I wanted something small enough to fit under the passenger side dash so it’s hidden when the top comes off every summer. Fit perfect and pushes a great note through the Rockford Fosgate 6.5’s and the other 2 channels are bridged to a single 8” sub
      Customer image
      Amazon Customer
      5.0 out of 5 stars
      Small but packs a punch

      Reviewed in Canada on May 2, 2020
      Bought this little amp for a ‘72 International Scout II as I wanted something small enough to fit under the passenger side dash so it’s hidden when the top comes off every summer. Fit perfect and pushes a great note through the Rockford Fosgate 6.5’s and the other 2 channels are bridged to a single 8” sub
      Images in this review
      Customer image
    • Stephan Guenette
      4.0 out of 5 stars Fonctionne très bien
      Reviewed in Canada on June 22, 2022
      Acheté et installé dans le fairing de mon Harley FLHTC et collé sur dessus de la radio
      Branché mes sortie de haut-parleur directement dans l'entrée haute puissance et son est très bon
      Customer image
      Stephan Guenette
      4.0 out of 5 stars
      Fonctionne très bien

      Reviewed in Canada on June 22, 2022
      Acheté et installé dans le fairing de mon Harley FLHTC et collé sur dessus de la radio
      Branché mes sortie de haut-parleur directement dans l'entrée haute puissance et son est très bon
      Images in this review
      Customer imageCustomer imageCustomer image
    • Client d'Amazon
      5.0 out of 5 stars Perfec for motorcycle
      Reviewed in Canada on August 17, 2020
      Used this amp to power 2 6x9 jbl speaker.
      Super clean sound on high volume.
      No problem hearing my music riding my motorcycle!