Andy - the baffle angles are similar because the design parameters are similar. But each takes its own particulars into consideration and yields a slightly different resultant angle. Notice that some models have slight wave-guides which differ from one driver and model to another, determined by target radiation pattern to equalize power response through the crossover. Also, distance between drivers makes a difference. Bottom line is whatever angle produces co-temporaneous arrival time at the design target (about 10' out x 3'up x 10° off axis). The CS2.2 has about 11° baffle tilt, others more and less.