From the manufacturer:

One of our best sellers, this 12 inch guitar speaker meets the expanded frequency range often requested by the new generation of amp manufacturers.The Seventy 80 is detailed and crisply defined, with a tightly controlled low-end and punchy, aggressive upper mid-range. The top-end response is also subtly increased. Used singly, in pairs or quartets – it is capable of reproducing a wide range of sounds and styles whilst adding the undeniable Celestion character to any amp.