The Quake 12 is a professional-grade 12-inch woofer designed for DIY speaker builders and technicians replacing blown drivers in PA systems. This steel-frame driver delivers reliable low-frequency reproduction for live sound applications where you need proven performance without the premium price.

Built around a robust 50-ounce magnet and 2.5-inch voice coil, this woofer handles 150 watts RMS and peaks at 300 watts. The pressed steel chassis provides the structural integrity needed for high-output applications, while the paper cone delivers natural-sounding bass response. At 97 dB sensitivity, it efficiently converts amplifier power into acoustic output.

The 55-5,000 Hz frequency response and 8-ohm impedance make this driver suitable for two-way PA systems, floor monitors, and custom speaker builds. Whether you're building a new cabinet for your band's PA system or replacing a damaged driver in existing loudspeakers, the Quake 12 handles the demanding low-frequency duties that vocals and instruments require.

This woofer works in venues ranging from small clubs to outdoor festivals, depending on your cabinet design and amplifier pairing. Use it as the foundation for DIY PA speakers, replace failed drivers in commercial cabinets, or build custom monitor wedges for stage use.

Standard speaker wire connects to the terminals, and mounting requires basic woodworking tools for cabinet installation. Seismic Audio backs the Quake 12 with a one-year warranty and ships nationwide, giving you professional-grade components at accessible pricing.

Technical Specifications

Frequently Asked Questions

What size cabinet do I need for the Quake 12?

Cabinet volume depends on your intended application, but most PA applications work well with 2-4 cubic foot enclosures. For sealed cabinets, aim for 2.5-3 cubic feet, while ported designs typically need 3-4 cubic feet plus port volume. The driver's Thiele-Small parameters work well in both sealed and vented alignments for live sound use.

Can this replace the woofer in my existing PA speakers?

Yes, if your current driver is 12 inches with 8-ohm impedance and similar power handling. Check that the mounting depth and bolt pattern match your cabinet - most 12-inch drivers use standard mounting holes, but verify the basket depth fits your enclosure. The Quake 12's 150-watt RMS rating should match or exceed your original driver's specifications.

What amplifier power do I need for this woofer?

Match your amplifier's RMS output to the driver's 150-watt continuous rating for optimal performance. Amplifiers between 100-200 watts RMS work well, giving you headroom for transient peaks without overpowering the driver. Avoid amplifiers significantly overpowered for this driver to prevent damage from clipping or excessive drive levels.

Will this work for bass guitar or just PA applications?

While designed primarily for PA and live sound reinforcement, the Quake 12 can work in bass guitar cabinets with proper enclosure design. The 55 Hz low-frequency response handles most bass fundamentals, though dedicated bass drivers typically extend lower and offer different voicing optimized for instrument reproduction rather than full-range PA use.

Do I need a tweeter with this woofer for a complete speaker?

Yes, the 5,000 Hz upper frequency limit means you'll need a high-frequency driver for full-range reproduction. Plan on crossing over to a compression driver or dome tweeter around 2-3 kHz for vocals and cymbals. This woofer handles the critical midrange and upper bass frequencies that give vocals body and punch in live sound applications.

WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer. For more information, go to: www.P65Warnings.ca.gov