Alpine SWD-355 Subwoofer Amplified Powered Active Sub with Wired Remote 150w RMS
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The Alpine SWD-355 is a ready-to-fit 12-inch (30 cm) amplified subwoofer box that combines the SWE-1244E subwoofer with a built-in MRV-M250 Digital V-Power amplifier for 150W RMS (550W max) of deep bass, controlled by a wired remote bass level control.
Everything comes in one unit with plug connectors and both RCA and speaker inputs, making it a straightforward bass upgrade for any car.
Key specifications
- Subwoofer: 12" (30 cm) SWE-1244E, 4 Ohm, 650W peak
- Amplifier: MRV-M250 Digital V-Power (Class D), 150W RMS into 4 Ohm, 550W max
- Frequency response: 30Hz – 200Hz
- Low pass filter: Adjustable, 50–400Hz @ 24dB/oct
- Bass EQ: 0 to +12dB at 50Hz
- Inputs: RCA and speaker level
- Dimensions: 450 mm (W) x 392 mm (H) x 315 / 422 mm (D)
- Remote: Wired bass level control with 5m cable
Ready-to-use amplified subwoofer box
The SWD-355 puts a 12" subwoofer and dedicated amplifier into a single ready-to-fit unit. The SWE-1244E subwoofer pairs with the MRV-M250 Digital V-Power amplifier to deliver 150W RMS of clean, controlled bass. Install it, connect it, and it's done.
- SWE-1244E: 12" (30 cm) subwoofer, 4 Ohm
- MRV-M250: Digital V-Power mono amplifier
- High-quality bass reflex box
- Wired remote bass level control included
Explore the full range in Alpine Subwoofers.
Specification
| Frequency Response | 30Hz - 200Hz |
|---|---|
| Dimensions | 450mm (W) x 392mm (H) x 315mm / 422mm (D) |
More specs
| |
What's Included
- Alpine SWD-355 amplified subwoofer box (SWE-1244E 12" subwoofer with built-in MRV-M250 amplifier)
- Remote bass level control with 5m cable attached
- Installation documentation
Alpine
About the Alpine SWD-355
From our tech experts at CEN
An active subwoofer with the amplifier built in, rated at 150w RMS, so you get bass from one compact unit rather than a separate sub, amp and enclosure.
Who it suits
Drivers who want more low end without rebuilding the system or losing the boot. Powered units suit cars where space is tight, and anyone who wants bass but not a competition install.
Our tech experts advise
It still needs a proper fused feed from the battery and a signal source, which is where most DIY attempts come unstuck. Setting level and crossover against your existing speakers is what makes it blend. Installation is priced per vehicle, so get in touch with your make, model and year and we will confirm what it needs and what the work involves. See car audio installation.
Explore the full Alpine range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Alpine
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Have it Fitted By Our Team
Our team fits car audio, stereos, dash cams and vehicle security at our workshop in Beeston, Nottingham. Tell us your vehicle and we'll confirm the parts and a fitted price.
- 1
Tell us your vehicle
Make, model and year, and what you'd like fitted.
- 2
We confirm the parts
Fascia, wiring and interfaces checked for your car, with a fitted price.
- 3
Fitted at our workshop
Bring it to our Beeston workshop and we do the rest.
Unit 25 Technology Drive, Beeston, Nottingham NG9 1LA
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Frequently Asked Questions
Q: Do I need an amplifier for this subwoofer?
A: Yes, unless it is an active (powered) subwoofer with a built-in amplifier. Passive subwoofers need an external amplifier matched to the RMS power and impedance shown in the Specification tab.
Q: What does RMS power mean?
A: RMS is the continuous power a subwoofer can handle, and it is the number that matters when matching an amplifier. Peak or max figures describe short bursts only. Match your amplifier output to the RMS rating in the Specification tab.
Q: Can CEN build or supply an enclosure and fit everything?
A: Yes. CEN supplies enclosures and offers professional installation from our Nottingham premises, including amplifier wiring. Contact us to discuss your build.
Q: Does the Alpine SWD-355 need a separate amplifier?
A: No. The SWD-355 has a built-in MRV-M250 Digital V-Power mono amplifier delivering 150W RMS into the 4 Ohm SWE-1244E subwoofer, with 550W max power.
Q: Can the SWD-355 be connected to a factory stereo?
A: Yes. It has both RCA and speaker level inputs, so it can be fed from an aftermarket head unit with pre-outs or from a factory stereo's speaker outputs.
Q: Can the SWD-355 be run sealed or ported?
A: Yes. It has a removable port plug, so the bass reflex box can be used in sealed or vented operation.
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