Alpine SWX-1243D subwoofer

Type-X 12″ DVC Subwoofer.  500W-1000W power range


Extreme Performance.

If you are looking for a high-quality subwoofer with the most accurate and precise in-vehicle subwoofer performance, then look no further.

Alpine’s 2nd generation state-of-the-art Type-X Subwoofers are the answer.  With the advanced motor structure and new sound of these subs, you will experience higher efficiency, lower heat creation while maintaining superb sound, so you can really crank up the bass.


High-strength Kevlar-Rohacell Cone
Large Strontium magnet
High-Amplitude Multi-Roll Surround
Gold-Plated Easy-Access Terminals for heavy-gauge speaker wires
Easy jumper configuration


Power Handling
Power Handling (RMS/peak): 1000W/3000W
Power Range (RMS): 500W-1000W

Diaphragm Material: Kevlar Rohacell Layered Composite
Frequency Response (Hz): 24Hz-200Hz
Spider Material: Nomex

Size: 12″

Recommended enclosure sizes for optimum bass output
Sealed Enclosure:
– Recommended: 25.5L
Vented Enclosure:
– Recommended Volume: 51.0L
– Round Port Dia. x L (cm): 10.2 x 40.6
– Slot Port W x H x L (cm): 35 x 2.33 x 40.6


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