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3000W Under Seat Subwoofer with Amp, AI 3-Way Car Audio System

Based on 13 reviews
Condition: New
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$149.99
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Availability: In Stock.
Fulfilled by Amazon

Arrives Nov 1 – Nov 2
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At a glance

Condition
New
Color
Black
Size
10 in
Model
WJX09
Dimensions
2.76"D x 10.28"W x 13.58"H
Audio Output Mode
Mono
Input Voltage
12 volts
Warranty
2 Year Manufacturer
Works with
Car Stereo、Factory Car Audio Systems、Aftermarket Car Stereos

Features 5

  • Fuller Music, No Bulky Trunk BoxAdd richer bass, fuller vocals and more musical detail to everyday drives without sacrificing valuable cargo space.
  • More Than Ordinary BassThree dedicated drivers and AI Sound Boost bring lows, mids and highs together for a fuller, more exciting listening experience.
  • Two Modes, Your SoundChoose Bass Mode for punch or Full-Range Mode for broader music; fine-tune the output with the included wired level controller.
  • Flexible Mounting, Less HassleIncluded screws let you mount under a seat or in another suitable spot; built-in Class D amp means no separate amplifier.

Specs 18

Brand TANVSO
Speaker Maximum Output Power 3000 watts
Connectivity Technology RCA、Wired
Audio Output Mode Mono
Input Voltage 12 volts
Mounting Type Under Seat Mount
Enclosure Material Aluminum
Speaker Type Subwoofer

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Nov 1 – Nov 2

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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View our full returns policy here.

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Top Amazon Reviews


Vibrant, Room-Filling Acoustic Fidelity packed into a Compact Audio Footprint!
Color: Black Size: 3 INCH
Acquiring this two-pack of three-inch full-range speaker drivers has provided a spectacular hardware component solution for constructing custom desktop monitors, upgrading portable Bluetooth audio cabinets, and restoring classic bookshelf enclosures. Finding miniature speakers that deliver a balanced acoustic performance without cracking or distorting at higher output levels can be a challenge, but these specialized twenty-watt drivers handle audio translation tasks with great technical precision. The acoustic engineering and material quality of these three-inch drivers are highly impressive. They feature a thick, premium-grade paper or composite cone paired with a highly flexible rubber surround that facilitates a wonderfully smooth, linear physical excursion. Because they are calibrated as true full-range drivers, they deliver a remarkably well-rounded sound signature from a single source. The high-frequency vocal lines are exceptionally crisp and clear, while the lower midrange registers carry a warm, punchy resonance that brings media to life without the muddy cabinet rattling common to cheap stock speakers. Operating at a standard four-ohm impedance, they integrate smoothly with low-voltage digital amplifiers, maximizing electronic efficiency to draw clean power effortlessly. From a durability standpoint, the hardware is built to handle extended playback sessions. The voice coils are wound with high-conductivity copper wire and supported by a heavy-duty, stamped steel basket that keeps the internal permanent magnet perfectly centered. This rigid structural frame completely eliminates common distortion risks and voice coil rubbing, even when the drivers are pushed to their maximum twenty-watt thermal capacity. The integrated solder terminals are thick and clearly labeled for correct positive and negative wiring polarity, accepting wire leads cleanly without shifting or becoming loose under heat gun application. Evaluating their value, this matching pair offers a highly cost-effective and essential asset for audiophiles, DIYers, and electronic makers alike. It bundles premium driver articulation and industrial-grade construction into a single affordable package for a very reasonable market price point, matching the precise build specifications of expensive boutique audio components. For anyone seeking to assemble a custom sound system or upgrade an old-school stereo project with a highly reliable, responsive driver set, this model is a top-tier recommendation. ... show more
Reviewed in the United States on October 16, 2026 by Vince

Compact 3-Inch 4-Ohm 20W Full-Range Audio Drivers Built for DIY Boombox Builds
Color: Black Size: 3 INCH
I pulled up the technical specifications for these 3-inch 4-ohm 20W full-range speaker drivers to see how they stack up for custom audio enclosures and portable boombox setups. 3-Inch 4-Ohm 20W Full-Range Speaker Drivers (2-Pack) What makes these compact 3-inch full-range driver units so practical for small audio boxes and custom enclosure builds is their balanced power handling and versatile frequency reproduction. Operating at a nominal 4-ohm impedance, they pair easily with low-voltage DC amplifier boards (like 12V–24V Class-D modules) to deliver crisp mids, clear highs, and punchy upper bass without requiring massive power draw. Audio Specs and Physical Dimensions Impedance: 4 Ohms Shahzad Electronics Power Handling: 20W RMS / 30W Peak per driver Shahzad Electronics Frequency Response: 25 Hz – 20 kHz Shahzad Electronics Sensitivity: 90 dB Shahzad Electronics Driver Diameter: 3 inches (78 mm frame) Shahzad Electronics Mounting Depth: 1.7 inches Magnet Dimensions: 2.0 inches x 0.7 inches The Honest Breakdown Pros: 4-ohm impedance draws solid output out of lower-voltage DC audio amplifiers; 20W RMS power handling provides plenty of volume for small gear cases; compact 1.7-inch mounting depth fits tight custom enclosures; high 90 dB sensitivity maximizes efficiency. Cons: The full-range drivers deliver clean vocal clarity and crisp highs across their frequency range, but because the cone area is limited to a 3-inch frame, pairing them with a dedicated active subwoofer channel brings out the deep low-end bass punch needed for outdoor listening. Summary: Why it's a good value This 2-pack of 3-inch 4-ohm 20W full-range speaker drivers is an incredible value because it delivers solid 20W power handling, high 90 dB sensitivity, and compact mounting dimensions for a full 5-star price. It provides a clean, budget-friendly audio driver solution for DIY speaker builds, portable boomboxes, and desktop gear cases. For anyone assembling custom compact audio enclosures, these 3-inch drivers are definitely worth purchasing. ... show more
Reviewed in the United States on October 10, 2026 by WS1984C

Clear, easy-to-drive full-range drivers for a small DIY speaker build
Color: Black Size: 3 INCH
I had an old pair of small bookshelf speakers with blown drivers and a little amplifier board sitting in a drawer, so this TANVSO 2-pack was a perfect excuse for a weekend DIY project. They're 3-inch full-range drivers rated at 4 ohms and 20 watts. That's a good match for the small class-D amp boards that are popular for DIY builds, and they're easy to drive without needing a big amplifier. Being full range, they cover the whole sound range in a single driver, with no separate tweeter or crossover to wire up. That keeps a small build simple: two wires per speaker and you're done. The terminals are clearly marked for polarity, the frames have mounting holes that lined up with the old cutouts in my boxes, and the drivers seated flush with just a bit of foam gasket. Once they were wired to the amp, the sound was clear and well balanced for their size. Voices and podcasts are crisp and easy to understand, acoustic music and guitar sound natural, and the highs are present without being harsh. A 3-inch driver isn't going to deliver deep bass, but in a sealed box the low end is fuller than I expected, and at desk or kitchen listening volume they never sounded strained or distorted. The build quality looks solid for the price, with sturdy frames, cleanly glued cones, and flexible surrounds. For desktop speakers, a small Bluetooth speaker build, repairing old computer or bookshelf speakers, or anyone learning DIY audio, this pair is an affordable and easy way to get good, clear sound. ... show more
Reviewed in the United States on October 9, 2026 by Ryan

An excellent full range driver for DIY
Color: Black Size: 3 INCH
These speakers sound great in a stereo configuration or bridged as single MONO speakers. You'll have to watch what receivers you set these up with because 4ohm is rather low and apparently that means that a receiver has to work harder somehow to use these, which translates into more heat. The flipside is that these may show their volume at lower knob levels. It is rather complicated and I don't understand it fully so do your homework before setting up your DIY speakers, or even 3" speaker replacements. I found the quality of these to be absolutely crystal clear in the upper frequencies: brass, guitar, vocals, and higher pitches that I only thought were possible with a tweeter. The ability to represent lower frequencies may be more obtainable with a ported box, but you lose the tight punchiness that an enclosed box can give. If you are able, try to setup a crossover to separate the upper and lower ranges with an additional larger woofer 6-10"+. I plan on integrating these with a 10" woofer to see if I can maximize my stereo audio experience. ... show more
Reviewed in the United States on October 15, 2026 by Nicholapicus

Matching 3-inch drivers for a pair of desk speakers
Color: Black Size: 3 INCH
I built two small speaker boxes from scrap plywood and mounted one of the 3-inch full range drivers in each for my workbench. Both drivers fit the 77 mm cutouts I traced, and I wired them to a small 4 ohm amplifier I already had on the shelf. My first cutout came out a hair too small, so I spent an extra half hour with sandpaper paying for my refusal to measure twice. Once both were in, podcast voices came through clear, and music had a balanced sound at desk volume with no rattle from the cones. Because the drivers match, the left and right boxes sounded the same when I played a stereo track. The cones sit evenly inside their frames, and the terminals are firmly attached with each frame resting flat against the baffle once screwed down. They turned a weekend pile of scrap wood into a working pair of speakers for the bench. ... show more
Reviewed in the United States on October 13, 2026 by Show My Stuff

Great Little Speakers for DIY Audio Projects
Color: Black Size: 3 INCH
This 2-pack of 3-inch speakers is a handy option for small audio projects and replacement applications. I like that they have a compact design, making them easy to work with when building small speaker boxes or upgrading an existing setup. The 4-ohm impedance and 20W rating make them worth considering for compatible audio projects. The full-range design is also convenient because it is intended to handle a broad range of sound frequencies without needing separate drivers for different ranges. Having two speakers in the pack is a plus for building a pair of compact speakers or working on a stereo project. Their small size makes them suitable for DIY electronics, custom enclosures, and other applications where space is limited. Overall, these are a useful option for hobbyists and anyone working on small speaker builds or repairs. Just be sure to check the dimensions, impedance, power requirements, and mounting space to make sure they are compatible with your setup. ... show more
Reviewed in the United States on October 13, 2026 by Mari

Not bad for the price
Color: Black Size: 3 INCH
I received a pair of 3 inch 4 Ohm speakers for review. I have not had a chance to install them in a proper tuned enclosure; but I did hook them up to an amp and got clear sound out of them, and there was a little bit of low end potential, so we'll see how well they deliver on the "full range" claim. Considering the low price, these aren't bad at all for a cheap DIY project. I have the amp, BT receiver and battery pack ready to go; I just need to cut out some boxes and wire them up. If nothing else, it will be a fun time. ... show more
Reviewed in the United States on October 7, 2026 by amazon_customer_nc

Affordable Option for DIY Audio Projects
Color: Black Size: 3 INCH
These compact 3-inch speakers look like a useful option for small audio projects, speaker box builds, or replacing compatible drivers. I like that they come as a pair, which makes them convenient for a basic stereo setup or a project that needs two matching speakers. Their small size also makes them easier to work into compact enclosures where larger drivers might not fit. Just be sure to check the dimensions, impedance, and power requirements of your equipment before installing them. Overall, they offer an affordable starting point for anyone who enjoys experimenting with DIY audio. ... show more
Reviewed in the United States on October 10, 2026 by Chris
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