sentences:  Also by 2005, Cambridge products could claim to be on sale in more than 50 countries worldwide.2006 was another key year in the development of the Cambridge Audio brand with the introduction of the Azur 840A integrated amplifier, 840E preamplifier, 840W power amplifier and the 840C CD player, the first products that the company described as 'affordable' high-end audio.The 840A integrated amplifier also introduced Cambridge Audio's Crossover Displacement (Class-XD Amplifier) design, which combined the performance of a class A design with the efficiency of class AB.