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Soundstream ST4.1200D Stealth Series 1200W Class D 4 Channel Amplifier
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.
The latest and greatest of class d full range technology allows us to Pack 10 lbs in less than 2 lbs chassis.
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.
Mike
2025-08-29 16:11:13
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
Chad_C
2025-08-01 15:22:22
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.
Sneeknasty
2025-07-24 17:06:09
Using 4 on different cars. 3- 2.5 years total, no issues yet. Instructions are not the best, but product is great .
Customer
2025-07-12 16:22:54
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.
Francisco Ramos
2025-06-30 17:16:24
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. I figured it out in the end.
Brian
2025-06-29 13:51:11
I chose the Soundstream ST4.1200D running my front and rear mids/ highs separates (Hertz brand) to replace a JL Audio JX 400/4D that was cutting in and out and producing static. I've had good experiences with Soundstream amps in the past and after reading many favorable reviews decided to give them a shot again. 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. I was surprised at how small it was due to it being Class D & the type of wiring harnesses it comes with. I used the supplied RCA to wire plug adapter since my existing system used RCA cables, and hooked up to power, ground and remote turn-on (if your using speaker level inputs you can do without the remote wire). It has LP/HP crossover switch but I'm running it full range since my head unit has crossover and EQ built-in. The manual shows a wiring schematic but did not include individual wire colors in it so I simply looked them up online (They are standard colors, same as almost every speaker wire out there, White, Grey, Green & Purple with negative having a black stripe). I initially turned the gains to halfway point, but after testing, volume was too low, I had to turn them all the way to max for my particular system. Sound is clean, clear at both quiet and loud volumes with pretty low noise considering my gain is at max, noise is less than the JL Audio it replaced. More expensive amps will have screw lug terminals and jacks integrated into the chassis, whereas the Stealth uses wire harnesses for all inputs, outputs and power, so butt/ splice connectors will be needed. Overall I am pleased with my purchase and would buy this amp again.
Customer
2025-06-14 13:46:47
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!
Christopher R.
2025-06-06 15:33:32
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.
Client d'
2025-05-28 18:29:09
installer sur moto flhx dans le fairing
Brian F Binnie
2025-04-26 15:40:53
Son loves it on his Harley
Customer
2025-04-08 15:07:16
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Stephan Guenette
2025-02-04 15:41:58
Acheté et installé dans le fairing de mon Harley FLHTC et collé sur dessus de la radioBranché mes sortie de haut-parleur directement dans l'entrée haute puissance et son est très bon
Client d'
2025-01-29 10:00:55
Used this amp to power 2 6x9 jbl speaker.Super clean sound on high volume.No problem hearing my music riding my motorcycle!
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