What amplifier power does the Jensen J4W12 need?

Match it to its 300W RMS rating at 4 ohms. A 250–350W mono amp at 4 ohms is a sensible pairing; ignore the 1200W peak figure when choosing an amp.

What size enclosure does it fit?

It is a standard 12-inch driver, so it drops into most 12-inch sealed or ported boxes. Jensen says it also works in bandpass enclosures.

Is it dual voice coil?

No. It uses a single 4-ohm voice coil, so you wire it as one 4-ohm load rather than the 2-ohm or 1-ohm options dual-coil subs allow.

Will it work with a factory head unit?

Not on its own. It needs a dedicated amplifier and wiring; a line-output converter can feed the amp from a stock radio.

Is it worth it over a dual-voice-coil sub?

If you have a small 4-ohm-stable amp and want simple bass, yes. If you plan to upgrade amps or chase high output, a dual-4-ohm sub gives more wiring flexibility.

Where is the Jensen 12-Inch Subwoofer cheapest?

At Walmart, for $89.99, as of our latest check.

Where can I buy the Jensen 12-Inch Subwoofer?

2 stores we checked sell it, including Walmart, Best Buy.

Jensen 12-Inch Subwoofer

Best price now

$89.99at WalmartChecked Nov 10

Compared across 2 stores. Prices are checked against each store and labelled with when.

Visit Walmart

Jensen 12-Inch Subwoofer

Best price now

$89.99at WalmartChecked Nov 10

Compared across 2 stores. Prices are checked against each store and labelled with when.

Visit Walmart

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Price facts

Last seen at $89.99 at Walmart on Nov 10.
Checked at 2 stores.

Our take on the Jensen 12-Inch Subwoofer

The Jensen J4W12 is a 12-inch car subwoofer rated at 300 watts RMS and 1200 watts peak, with a single 4-ohm voice coil. Its blue cone and double-stitched rubber surround are built for heat resistance and long excursion, and the steel-stamped frame keeps movement linear at high volume. It works in sealed, ported or bandpass boxes, which makes it a flexible entry-level pick for a first bass upgrade. Against pricier name-brand subs it gives up output and build refinement, but it asks far less of your amplifier and wiring.

Best forFirst-time bass upgrades on a stock or small amplifierBudget builds that need one 12-inch driverSealed or ported box builds with a 4-ohm loadDrivers who want a simple single-voice-coil install

Pros

Single 4-ohm coil is easy to match to most amps
Works in sealed, ported or bandpass enclosures
300W RMS rating is modest enough for stock electrical systems
Rubber surround and steel frame hold up to daily use
Blue cone stands out in a show-through install

Cons

1200W peak rating overstates real-world power handling
Single voice coil limits wiring options compared with dual-4-ohm subs
Modest output next to premium 12-inch drivers
Not a competition-grade sub for high-SPL builds

Jensen 12-Inch Subwoofer prices at every store

WalmartNew
In stockSold by WNH DISTRIBUTION, INC.Returns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$89.99Checked Nov 10
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Best BuyNew
In stock
$89.99Free shippingChecked Nov 10
Visit Best Buy

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Jensen 12-Inch Subwoofer price history

Lowest price we've seen: $89.99 on Nov 10 at Best Buy. Tracked across 1 store since Nov 10.

What reviewers say

Owner feedback is thin, but what exists centers on value: it delivers noticeably more low end than factory speakers for a low outlay. Buyers with bigger amplifiers report it runs out of steam sooner than premium subs.

What people mention

ValuePraisedOwners say it delivers a clear bass upgrade for very little money.
Power handlingMixedThe 300W RMS rating suits small amps, but the 1200W peak number misleads buyers matching amplifiers.
OutputCriticisedDrivers pushing it hard say it runs out of volume before premium 12-inch subs do.
BuildPraisedThe rubber surround and steel frame are seen as solid for the price.

About the Jensen 12-Inch Subwoofer

The Jensen J4W12 12-Inch Subwoofer with 1200 Watts Peak Power is a fantastic addition to your car audio system, delivering deep and profound bass. This digitally optimized subwoofer is engineered to produce efficient, low-sounding bass with 300 Watts RMS at 4 Ohms. The blue woofer cone with double-stitched rubber surround ensures accurate and loud music, providing better heat resistance, internal damping, and added bass response. The steel-stamped reinforced structure increases linearity and allows greater movement for studio-quality sound in your car. The J4W12 works in sealed, bandpass, or ported enclosures.

Specifications

color: BlueSource
size: 12"Source

Questions and answers

What amplifier power does the Jensen J4W12 need?: Match it to its 300W RMS rating at 4 ohms. A 250–350W mono amp at 4 ohms is a sensible pairing; ignore the 1200W peak figure when choosing an amp.
What size enclosure does it fit?: It is a standard 12-inch driver, so it drops into most 12-inch sealed or ported boxes. Jensen says it also works in bandpass enclosures.
Is it dual voice coil?: No. It uses a single 4-ohm voice coil, so you wire it as one 4-ohm load rather than the 2-ohm or 1-ohm options dual-coil subs allow.
Will it work with a factory head unit?: Not on its own. It needs a dedicated amplifier and wiring; a line-output converter can feed the amp from a stock radio.
Is it worth it over a dual-voice-coil sub?: If you have a small 4-ohm-stable amp and want simple bass, yes. If you plan to upgrade amps or chase high output, a dual-4-ohm sub gives more wiring flexibility.
Where is the Jensen 12-Inch Subwoofer cheapest?: At Walmart, for $89.99, as of our latest check.
Where can I buy the Jensen 12-Inch Subwoofer?: 2 stores we checked sell it, including Walmart, Best Buy.