sentences:  The continued expansion of the company put a strain on both its physical and financial resources and at the end of 1988 Cambridge Audio became part of the Hi-Fi Markets Group.The product range underwent another significant change in appearance with the low profile black cases giving way to full height cases finished in a neutral grey colour.Internally though, the existing Stan Curtis circuit designs were retained with key new product launches for the DAC2 and DAC3 digital-to-analogue converters and the T40 FM tuner.