The CoAx-15 is built for sound engineers, venue installers, and DIY builders who need a replacement driver or want to construct custom speaker cabinets. This 15-inch coaxial speaker delivers both low and high frequencies from a single point source, eliminating phase issues common with separate woofer-tweeter designs.

With its integrated T-yoke design, the CoAx-15 produces coherent sound dispersion that's essential for floor monitors, PA mains, and recording studio nearfields. The coaxial configuration means all frequencies originate from the same acoustic center, providing better stereo imaging and more consistent coverage across the listening area.

The speaker handles 350 watts RMS with 700-watt peak capacity through its 3-inch low-frequency voice coil and 1.75-inch high-frequency voice coil. At 98 dB sensitivity and 8-ohm impedance, it works efficiently with most amplifiers while covering 40Hz to 18kHz. The pressed steel chassis and paper cone with cloth surround provide durability for permanent installations.

This coaxial driver works well for small to medium venues up to 200 people, recording studios, and custom cabinet builds where you need full-range sound from a single driver. It's particularly effective in applications where maintaining phase coherence is critical, such as nearfield monitors or delay towers.

The CoAx-15 mounts using eight 1/4-inch slots in a standard 13 5/8-inch cutout. You'll need speaker wire rated for your amplifier's output and appropriate cabinet volume calculations for optimal performance. Seismic Audio backs this driver with a one-year warranty and ships ready to install in your custom enclosure.

Technical Specifications

Frequently Asked Questions

What size venue can the CoAx-15 handle?

This coaxial driver works best in small to medium venues up to 200 people, depending on your cabinet design and amplifier power. It's ideal for recording studios, rehearsal spaces, small clubs, and house of worship applications where you need full-range sound without the complexity of separate woofers and tweeters.

What cables and connections do I need for the CoAx-15?

The CoAx-15 requires standard speaker wire connected to both the low-frequency and high-frequency terminals. You'll need wire rated for your amplifier's output power - typically 12 or 14 AWG for most applications. The driver has separate input terminals for the woofer and tweeter sections that can be wired to a single amplifier channel or bi-amped.

Do I need a crossover with this coaxial speaker?

Yes, you'll need a passive crossover network to properly divide frequencies between the 15-inch woofer and the integrated high-frequency driver. The crossover point and component values depend on your specific cabinet design and desired frequency response. Many builders use crossovers in the 1.5kHz to 3kHz range for 15-inch coaxials.

How does the CoAx-15 compare to separate woofer and tweeter systems?

Coaxial designs like the CoAx-15 offer better phase coherence since all frequencies originate from the same point, making them excellent for nearfield monitoring and applications where precise stereo imaging matters. However, separate component systems typically offer more flexibility in crossover design and may handle higher power levels, making them better for large venue PA systems.

What cabinet volume works best with the CoAx-15?

Cabinet design significantly affects performance, but most builders use 3 to 5 cubic feet for the CoAx-15 in vented enclosures. Sealed cabinets work well in the 2 to 3 cubic foot range. You'll need to calculate port tuning and internal volume based on Thiele-Small parameters for optimal bass response in your specific application.

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