Soooo have had my Sigma for about 5 months, all seemed well. Until after a 9 month wait I received my new Naim Uniti Core. Very excited so immediately started ripping my cd collection and listening to some old classics. BUT all is not well here! To cut a long story short and after hours on the phone to Naim customer support as I thought it was faulty. NOOOOO it is the DAC in the Classé that has issues. Tracks seem to not play from the beginning, it jumps in or it has some kind of muting. I borrowed an external DAC from my retailer and problem solved. Uniti works beautifully and sounds great. Extremely frustrating, especially after the money these units cost. Tried calling tech support and they were next to useless. I guess as they are in takeover transition they don't really care. Well I do, so Classé can you look into this?!! Please?