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Soundstream ST4.1000DB

4-channel marine/powersports amplifier with Bluetooth® — 90 watts RMS x 4

Item # 530ST410DB

Pack a lot of power into a small space with Soundstream's ST4.1000DB 4-channel marine amplifier.

Pack a lot of power into a small space with Soundstream's ST4.1000DB 4-channel marine amplifier.

California customers:
Please click here for your Proposition 65 warning.

Item # 530ST410DB

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Temporarily out of stock

Expected: 8/26/2022


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About the Soundstream ST4.1000DB

Big power and a Bluetooth® bonus

Pack a lot of power into a small space with Soundstream's ST4.1000DB 4-channel marine amplifier. Its efficient Class-D design combines stable performance, low power draw, and excellent sound quality into a small footprint that's a great match for boats, motorcycles, ATVs, or any application where space is tight. Built-in Bluetooth lets you play your favorite music directly from smartphones and other mobile devices without the need for a receiver or the hassle of cables and plugs. Whether you're out on the water or up on a mountain, that's a big benefit.

Big power and a Bluetooth® bonus

Pack a lot of power into a small space with Soundstream's ST4.1000DB 4-channel marine amplifier. Its efficient Class-D design combines stable performance, low power draw, and excellent sound quality into a small footprint that's a great match for boats, motorcycles, ATVs, or any application where space is tight. Built-in Bluetooth lets you play your favorite music directly from smartphones and other mobile devices without the need for a receiver or the hassle of cables and plugs. Whether you're out on the water or up on a mountain, that's a big benefit.

Awesome sound, anywhere you go

This amp works with both factory and aftermarket radios, and quick-disconnect harnesses make the ST4.1000DB easy to install and remove. A subsonic filter eliminates ultra-low frequencies that can muddy your sound, while the conformal-coated circuit board keeps the sound cranking when you're out having fun.

The amp includes switchable white and black top plates, so you can choose the look which best matches your vehicle or vessel.


Product highlights:

  • 4-channel marine/powersports 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
  • ideal for boats, ATVs, side-by-sides, golf carts, and more
  • silver chassis with switchable black or white top plates
  • built-in Bluetooth for audio streaming
  • variable high-pass filters (35-250 Hz, 12 dB/octave)
  • subsonic filter
  • 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: 8-11/16"W x 1-1/2"H x 3-1/8"D
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # ST4.1000DB

What's in the box:

  • 4-Channel Class D amplifier with a 30A ATM fuse installed
  • Two 8.5" Speaker-level input harnesses (with 5-pin Molex connectors on one end)
  • Two 5.5" Line-level input harnesses (Stereo female RCAs on one end and 5-pin Molex plug on other end)
  • 6" Thru-pass harness (with 5-pin Molex plugs on both ends)
  • 6" Speaker output harness (with 8-pin Molex connector on one end)
  • 6" Power harness (with 6-pin Molex connector)
  • Right-angled Bluetooth antenna (MCX male connector)
  • 40" Bluetooth antenna extension (male and female MCX connectors)
  • 4 Self-tapping screws (Length=5/8")
  • Owner's manual
  • Self-adhesive faceplate (white)
  • Self-adhesive faceplate (black)

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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 without taking up a lot of space. The ST4.1000DB is equipped with Bluetooth 4.0 that lets you wirelessly play audio from a smartphone or other mobile device. You can also customize the look of your amplifier with exchangeable top plates in black and white.

Note: The amplifier does not have a low-pass filter, and is not recommended for powering subwoofers.

Power Output: The ST4.1000DB 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).

Bluetooth: The amplifier has a built-in Bluetooth receiver that lets you wirelessly connect to your smartphone or other mobile device. You can play digital music files stored on your phone, or stream music from internet radio stations and other music sites. The Bluetooth signal will override the signal being input through the wired connection. When the Bluetooth source is turned off, the wired signal will resume. The amp includes an omnidirectional antenna with a 40" extension for best reception. Bluetooth has a connection range of approximately 30 feet (10 meters).

Marine, Motorcycle, Utility Vehicles: The ST4.1000DB has a conformal coating that protects the printed circuit board from water and salt air. This allows you to install the amp in locations that may be subjected to moisture, such as in an ATV, motorcycle, or on a boat.

Note: Because the controls and connections are not completely sealed, installing the amplifier in a location that is subjected to frequent splashes or submersion is not recommended.

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.

Thru-pass Output: The ST4.1000DB features a thru-pass connection that allows you to daisy-chain multiple amplifiers without having to run additional input signals from the source unit. The 6" thru-pass harness consists of 5-pin Molex connectors on each end that you can connect between amplifiers to output the audio signal to another amplifier.

LEDs: The amp features two LEDs on one end to indicate the status of the amplifier. The green 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. On the other side, a blue LED glows with the amp is connected to a mobile device via Bluetooth.

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.

Controls: The ST4.1000DB's controls are located on the top of the amplifier. There are two sets of controls, one for the front channels (1&2) and one for the rear channels (3&4). The controls include:

  • Gain: The rotary gain controls let you match the amp's input sensitivity to the output of the source unit. 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.
  • Crossover: The amp features independent 12 dB/octave high-pass crossovers that can be set between 35Hz and 250Hz using the rotary controls.
Note: The manual incorrectly states that the amplifier also has a low-pass crossover.


Molex Connections: The Soundstream ST4.1000DB uses compact Molex connectors which plug into the amplifier for the amp's input (RCA), amp input (speaker level), thru-pass, 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 the 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 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 8 speakers. Speaker wires should be spliced onto the speaker output harness.


  • Frequency Response: 20Hz - 30kHz
  • Total Harmonic Distortion: <0.05%
  • Signal-to-Noise Ratio: 106dB
  • Input Sensitivity: 0.5V - 12V
  • Dimensions: Width 8.672", Height 1.465, Depth 3.095"

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Customer Q&A

15 questions already asked

What's the result of wiring two 4 ohm speakers on this 4 channel amplifier?
[ Johnny  Apr 19, 2021 ]
1 answer
Bought this amp for pontoon boat running four speaker's has great sound and more power than my kicker speakers need. Can't go wrong for the price.
[ DAVID  May 11, 2021 ]
Are the high-pass filters always on? I would like to bridge the rear channels to run a small sub, but not if the HPF can't be turned off.
[ Steven  Apr 07, 2021 ]
1 answer
The high pass crossovers are always on making this amp not a good choice to power a subwoofer. We have advisors that can be reached by calling 1-800-324-9695 who can discuss your setup and preferences to give a personal recommendation on an amp that will work
[ Paul  Apr 25, 2021 ]  Staff
I'm using this amp with 4 Kicker KM65 speakers, 4ohms 65watt max rms. What would be the best way to tune the Hz and Gain? I can't seem to get an accurate reading on the multimeter.
[ Charlie  Apr 07, 2021 ]
1 answer
If you purchased the product from Crutchfield, feel free to contact our Tech Support team. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer.
[ Krissy  Apr 20, 2021 ]  Staff
I just purchaded 4 - Two Pairs of Kappa Marine KAPPA6120M 100watt RMSfor my boat. Can this unit maximize the 100watts or is it to small?
[ Joe  Jul 13, 2020 ]
3 answers
I'm using it on a car that I drive on the street in the strip so I had music on the street it has for decent speakers and sounds really great
[ Robert  Jul 13, 2020 ]
too small, it is running a small set of speakers on my motorcycle, and it's not loud enough to hear the music when running at 50+mph.
[ Jim  Jul 13, 2020 ]
I am currently using this amp to run 4 MB Quart NK1-116L 6.75" 2-way RGB LED Marine Speakers for the last 2 years in my rzr. These speakers are not to far away from what you will be running. This amp has handled them just fine. You will be surprised.
[ Chris  Jul 13, 2020 ]
Can this unit feed sound to a second amp powering a subwoofer?
[ Dustin  May 06, 2020 ]
1 answer
Yes it has a pass through connection to feed a second amp.
[ STEVEN  May 27, 2020 ]
What size power wire should be used for this amp? I am taking out a head unit in my boat and replacing with this and a bluetooth controller. Can i Just use the existing wire that went to the head unit?
[ David  May 09, 2019 ]
1 answer
whatever gauge is recommended for that power source I personally got a 16 gauge and I installed my speakers on my motorcycle. Sounds powerful!Enter
[ JAMIE  May 25, 2019 ]
good mornig. I couldn´t find Low Pass Crossover, I only saw 2 High Pass Crossover. It´s rear High Pass Crossover really Low Pass???
[ Ezequiel  Dec 06, 2017 ]
1 answer
Filters on the soundstream st4.1000db filter out lower frequencies that are ment for a subwoofer. I don't know if they are labeled right.
[ Milan  Dec 08, 2017 ]
What are the actual dimensions of the amp? In the Overview it says dimensions: 6-1/2"W x 1-1/2"H x 3"D and in the Details tab it says its 8-11/16" wide. One will work for my application, the 8-11/16" will not.
[ David  Oct 03, 2017 ]
2 answers
It's 61/2
[ WALTER  Oct 04, 2017 ]
Its actualy pretty small think the 6 1/2 i fit it in a zx 14 sport bike under seat and a tail faring of 06 gsxr 1000
[ ricco  Oct 04, 2017 ]
Does this amp come with the connectors needed to plug everything in? I see that theyre not the 'insert wire and tighten down' type of connectors on most automotive style amps.
[ Matthew  May 30, 2017 ]
4 answers
No. You provide your own connectors. There are wired plugs provided with bare wire at the other end to attach your connectors.
[ Luis  Jun 09, 2017 ]
This amplifier is supplied with multi-pin connectors for low-level input (RCA connectors), high-level input, speaker output, and power. Each connector is equipped with approx. 6" of wiring, allowing connection using butt connectors or similar. The Crutchfield technical support team answered all of my questions.
[ Richard  Jun 01, 2017 ]
It comes with all required plugs for installation
[ Jim  May 30, 2017 ]
Yes it comes with all wires. All you have to buy separate are amp power wires 10 guage recommended.
[ kenneth  May 30, 2017 ]
I roll a Road Glide...I would prefer to not need to handle my phone while riding. If I leave my phone volume up can I still manipulate the volume with my deck controller? I would think so. ????
[ SL117  Oct 09, 2016 ]
4 answers
Ditch the HD head unit. I bought a Boss Bluetooth unit. With the SoundStream ST4.1000DB pushing Polk Audio M1 6½ woofers/1" tweeters component system in Batwing fairing and Polk Audio M1 6x9's in saddlebags. I can hear it loud and clear at 90 mph. Very happy with the results so I ordered a ST4.1200D. Put it on my bike and put the 1000 in my truck. Just ordered a ST2.1000D, thinking about running just my 6x9's with it.
[ Johnny  May 20, 2021 ]
Please let me know how you like the purchase.
[ BRYAN  Oct 10, 2016 ]
Ok, auto correct on iPhone took over. Buy it if you like it. I spent 700$ trying to get the amp to work and the factory amp was louder and worked.
[ BRYAN  Oct 10, 2016 ]
The answer is NO. I bought thinkers no the same thing and it turned it that 700$ later that it was better and LOUDER to Keep the Harley amp that was already on my. Don't buy this thinking it will take the place of your radio.
[ BRYAN  Oct 10, 2016 ]
Is there a dyno for this amp? And can 2 channels be brigded and the other 2 channels run as normal? If it can work this way would i need 2 or 4 ohm speakers when running 2 channels brigded?
[ Goober  Sep 15, 2016 ]
1 answer
The Soundstream ST4.1000DB's rear channels can be bridged for 3-channel operation; it produces 250 watts RMS and is only stable at 4 ohms bridged. If you have any further questions about the Soundstream amp, feel free to contact an Advisor directly by phone (1-800-324-9695) or online chat. I hope that helps!
[ Larry  Sep 20, 2016 ]  Staff
I know a phone provides the sound but as far as volume goes is it better to have a bluetooth controller with this amp ( would it allow you to play music louder than the volume control on the smart phone)?
[ Goober  Sep 15, 2016 ]
1 answer
There's no separate remote control available for the Soundstream ST4.1000DB amplifier. You can adjust the gain settings on the amp, but the volume would be controlled from your smartphone/Bluetooth device. I hope that helps! My bio:
[ Larry  Sep 20, 2016 ]  Staff
How does it allow you to play from your smart phone? don't you have to connect to the deck someway?
[ gary  Sep 10, 2016 ]
3 answers
I have no problem hooking up to bluetooth
[ WALTER  Oct 04, 2017 ]
I had a lot of trouble getting it to Bluetooth to my smart phone. Would work one time but not the next. I returned it & bought a JLAudio amp & superate blue tooth device. Works beautifully!
[ greg  Sep 16, 2016 ]
Nope you just hook up amp too speakers and sync amp to phone and its that easy
[ WALTER  Sep 10, 2016 ]

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