Aurum Cantus is a trusted name when it comes to ribbon tweeters, and leads the industry with its neodymium-driven ribbon technology. Each tweeter utilizes a lightweight, pure aluminum diaphragm to provide great high-end extension, exceptional detail, and quick transient response. The G1 is their highest output and most robust tweeter, and uses a longer, wider ribbon than in their other models. This allows very low crossover points, high power handling, and the highest sensitivity. Recommended minimum crossover frequency: 2,000 Hz.