8 ohms 20 Watts Tested and working See photos for details of condition. The product is a rare vintage 1960s 12 inch CR-12TX CalRad Coaxial speaker with an impedance of 8 ohms, manufactured in Japan. Known for their quality sound and durability, Calrad speakers are highly sought after by audio enthusiasts and collectors looking to add a touch of nostalgia to their vintage audio setups. This rare gem is sure to provide a unique and authentic listening experience with its classic design and Japanese craftsmanship.