Well this Meridian dac does sound superb and after some fighting got it to work with my mac. Today I purchased a cool Warp DVD so thought I would output from the DVD player via optical into the dac. Again the Meridian is having none of it, it can't lock onto the signal so basically I can't use it. This is such a shame, is there any reason for this apart from the fact it is ancient! Also not being very clever on this type of thing I have choice of out puts and inputs on the DVD player and DAC the optical cable or Coaxial. Now to me the other one looks like a simple phono connection, but I am guessing this is not so? If I were to use the coaxial option would this perhaps fix the problem with the DAC?