Listening through an iMac Schiit modi, lyr, and LCD 2's I got 2 out of 5 right. What does this this say about my ears, equipment, or hi res streaming? Admittedly I have had a cold recently and my ears may still be a little congested. Alternatively does this say more about hi res streaming...

Just bought a ld mk iv se from who I thought was a legit reseller in China. I suspect however that I've been shipped a 220v version as the amp is very weak with my Sennheiser hd 580's. The box has 220v written on it but there is no voltage sticker on the back as I have seen in photos in these...