Plus One® (patent pending) woofer cones –The Kappa® 65.9cs has a cone with more surface area than that found on competing models of the same size. The result is increased bass output and higher efficiency. And this much larger voice coil increases power handling, and provides better sonic integration with the mid/woofer.

Edge-driven UHF dome tweeters – These are not commonly used W-domes, but fully edge-driven domes like those found in fine home audio loudspeakers. This brand-new proprietary tweeter delivers flawless output to 35kHz, ensuring reproduction of every last detail.

Woven-glass-fiber woofer cone material is extremely stiff, which minimizes cone flex for very low distortion and improved clarity, Infinity® trademarks.

True Four Ohms – All Kappa speakers feature two-ohm voice coils. Original factory-installed speaker wiring in many cars is 18–22 gauge. This wire, and heating in the voice coil when power is applied, increases the impedance “seen” by the amplifier or head unit. The impedance of Kappa speakers has been adjusted to compensate for this increase, and can be safely driven by any head unit.

Computer-optimized voice-matched outboard passive crossovers – Each Kappa multielement and component system features an outboard crossover that has been voice-matched for flawless performance, with incredible detail and accuracy.

Adjustable tweeter level – Each Kappa component system features a user-adjustable tweeter-level control on the passive crossover.