JBL GTO-6527165mm 2-way Multi-element LoudspeakerPlus One® (patent pending) Woofer Cone — The GTO6527 has a cone with more surface area than competing models of the same size. The benefits of Plus One are greater efficiency and bass output. My-Ti™ (Mylar®/Titanium Composite) tweeters — Stiff and light, extremely efficient, JBL's new My-Ti tweeters deliver the high-frequency extension of titanium domes with the damping of composite diaphragms. These are not commonly used w-domes, but full edge-driven domes like those found in higher-quality home audio speakers. The benefits are increased power handling, reduced distortion and increased efficiency. This technology also allows for better integration with the midwoofer. 2-Ohm Impedance — Extracts all the power from amplifiers that are designed to increase their power when driving 2 ohms. Get all of the amplifier power possible with GTO. Unipoint™ allows the tweeter to rotate 360 degrees, enabling you to direct the tweeter for optimum imaging. The GTO6527 also includes a tweeter-level control, allowing for easy adjustment of tweeter output even after installation.