The CoAx-12 is a 12-inch coaxial speaker designed for DIY cabinet builders, sound engineers replacing blown drivers, and anyone building custom PA systems from the ground up. This raw speaker driver delivers both low and high frequencies from a single point source through its integrated tweeter design.

At 300 watts RMS (600 watts peak), this coaxial driver handles serious power while maintaining clarity across its 50Hz to 18kHz frequency range. The 97 dB sensitivity rating means it produces strong output without requiring excessive amplification, making it efficient for both powered and passive cabinet designs.

The pressed steel chassis houses a 3-inch voice coil woofer paired with a 1.75-inch voice coil compression driver, supported by a 70-ounce low-frequency magnet and 22.5-ounce high-frequency magnet. The paper cone with cloth surround provides reliable performance in demanding live sound applications. Eight mounting slots accommodate standard cabinet installation with a cutout diameter of 11¾ inches.

This speaker works well in full-range PA cabinets for bands, DJ monitor systems, and venue installations handling crowds up to 150 people when properly amplified. The coaxial design eliminates the phase issues common with separate woofer/tweeter configurations, making it ideal for floor monitors and nearfield applications where precise imaging matters.

Installation requires standard speaker wire connections to your amplifier or crossover network. The speaker ships ready to mount in your custom cabinet project.

Seismic Audio backs the CoAx-12 with a one-year warranty and direct technical support for your build project.

Technical Specifications

Frequently Asked Questions

What size cabinet do I need for the CoAx-12?

The CoAx-12 requires an 11¾-inch cutout diameter and 8 inches of interior depth clearance. For optimal performance, design your cabinet with internal volume between 1.5-2.5 cubic feet. The eight ¼-inch mounting slots provide secure installation in cabinets with standard thickness ranging from ½ inch to 1 inch.

How much power can this speaker handle safely?

The CoAx-12 is rated for 300 watts RMS continuous power and can handle peaks up to 600 watts. For longevity, match it with an amplifier rated between 200-400 watts RMS at 8 ohms. Running it with significantly more power risks damaging the voice coils, while underpowering may cause distortion at higher volumes.

Do I need a crossover with this coaxial speaker?

No external crossover is required. The CoAx-12 features an internal passive crossover that divides frequencies between the 12-inch woofer and integrated compression driver. Simply connect speaker wire directly from your amplifier to the speaker terminals. This makes it ideal for single-driver cabinet designs.

What venues can this speaker handle?

A single CoAx-12 in a properly designed cabinet can cover audiences up to 150 people for live music or DJ applications when paired with adequate amplification. For larger venues or outdoor events, consider multiple cabinets or adding subwoofer support for full-range coverage.

How does this compare to separate woofer and tweeter setups?

Coaxial speakers like the CoAx-12 eliminate phase alignment issues since all frequencies emanate from the same point. This creates better imaging and more consistent coverage angles compared to separate drivers. However, dedicated component systems may offer slightly better frequency separation in high-end 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