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Christmas cut off: The Christmas delivery cut-off date has passed. Delivery before Christmas is not guaranteed. For the best chance of receiving your order in time, please select Express shipping.

Please be advised that our website will undergo maintenance at 5:00 PM. We expect to be back online by 7:00 PM. During this time, the website may not function at full capacity.

Our last trading day before the holidays is 20th December, and we will reopen on 13th January.

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DS18 SB12A 12" Shallow Amplified Sealed Subwoofer Enclosure 350W

UPC: 810005188562 SKU: SB12A
DS18 SB12A 12" Shallow Amplified Sealed Subwoofer Enclosure 350WDS18 SB12A 12" Shallow Amplified Sealed Subwoofer Enclosure 350WDS18 SB12A 12" Shallow Amplified Sealed Subwoofer Enclosure 350WDS18 SB12A 12" Shallow Amplified Sealed Subwoofer Enclosure 350WDS18 SB12A 12" Shallow Amplified Sealed Subwoofer Enclosure 350WDS18 SB12A 12" Shallow Amplified Sealed Subwoofer Enclosure 350W
$549
$549$369
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Leaves warehouse tomorrow
  • Express to Metro (1-3 biz days)
  • Standard to Metro (2-6 biz days)
  • Express to Non-metro (2-6 biz days)
  • Standard to Non-metro (5-20 biz days)
  • Pickup (Same or next biz day)
  • Longer ETA applies to NT, WA, NZ & US locations.
  • The above time frames are estimates only. The actual delivery time is dependent on the shipping location, shipper's processing capacity and other unforeseeable factors i.e. natural disasters, accidents etc. We cannot be held responsible for any courier-related delivery delays.
  • In Stock
  • Model: SB12A
  • 16 Reviews
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SB12A Slim 12-Inch Powered Shallow Subwoofer Enclosure (350 Watts MAX)

The DS18 SB12A is a compact, self-powered 12-inch shallow subwoofer system engineered to deliver deep, heavy bass in space-restricted vehicle interiors. Combining a high-excursion 12-inch subwoofer and an integrated Class-D amplifier inside a slim, sealed enclosure, this all-in-one powered solution easily fits under seats, behind truck benches, or in tight cargo areas. Delivering 350 Watts MAX power and 125 Watts RMS, the SB12A features high and low-level inputs, adjustable crossover controls, bass boost, and an included remote level control for effortless sound tuning from the driver's seat.

  • All-in-One Active System: Features an integrated Class-D amplifier built into the enclosure, eliminating the need for external amplifier mounting.
  • Slim Shallow-Mount Design: Compact profile allows for easy under-seat or behind-seat installation in trucks, SUVs, and compact cars.
  • High and Low-Level Inputs: Connects seamlessly to aftermarket head units via RCA inputs or factory OEM stereo systems using speaker-level inputs.
  • Customizable Sound Tuning: Equipped with an adjustable low-pass filter, phase switch, and bass boost control to tailor low-end output to your interior.
  • Remote Bass Level Control: Includes a wired dash-mount remote knob to fine-tune subwoofer volume directly from the front seat.
  • Subwoofer Size: 12 Inches (305mm)
  • Amplifier Type: Integrated Class-D
  • MAX Power Handling: 350 Watts
  • RMS Power Handling: 125 Watts
  • Nominal Impedance: 2 Ohms
  • Frequency Response: 20Hz – 150Hz
  • Signal-to-Noise Ratio: >90 dB
  • Low Pass Filter: 50Hz – 150Hz
  • Bass Boost: 0 to +12 dB @ 45Hz
  • Enclosure Type: Sealed Shallow Composite Housing
  • Inputs: RCA Low-Level & High-Level Speaker Inputs
  • Application: 12V DC Under-Seat and Truck Cab Subwoofer Systems
Unexpected

Using this sub in my hidden hatch on my BMW X2 and I made a great choice. This thing hits hard harder than I thought. Do you won't need another sub before after this one. Awesome product.
Kristian Thompson, 2026-09-19 on Ds18


Get it

Worth the money, fit perfectly under my seat, bumps and perfectly priced.
Jose Marin, 2026-04-23 on Amazon


Sub

Sounds great
Ginger Kremple, 2026-01-21 on Amazon


Love it. So easy to

Love it. So easy to connect and sounds so much better than i thought it would.
C.C., 2025-09-30 on Ds18


Very good

It is pretty good, we have it in a single cab pickup behind the seat and it is more than enough. Space was the main obstacle for us so wedge shape was important.
Chris Gearhart, 2025-07-18 on Amazon


Very good

Very easy to install your self and Very nice sound.
Jose Lopez, 2024-12-19 on Ds18


Great little package

I put this in an obs Chevy. It sounds way better than I thought something its size would. It has great lows and no distortion. It really sounds like a bigger ported box. I am pleased with it.
Lynn Byrd, 2024-09-16 on Ds18


GREAT SUB AND AMP COMBO

I have limited room in my trunk and this was a amazing buy it's all in one I don't have cables everywhere and it's a easy install
Adrian Ramirez, 2024-03-16 on Amazon


Awesome

Was kinda hesitant to buy it at the beginning due to its dimensions/performances, and may not fit under the passenger seats...a little adjustments later and it rocks! DS18 12 low outputs blend perfectly with my Sony XAV-AX8100 on my 07 Tundra. Recommend buy it from these guys...they're fast and follows through your purchase...
Marions, 2024-02-06 on Extremeterrain


12-inch Loaded Amplified Shallow Subwoofer Enclosure 350 Watts Rms

Sounds good for what it is... I currently have it on my obs.
Alfredo Castro, 2023-07-27 on Ds18




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