I picked this up second hand on ebay, more out of curiosity than anything. I'm just getting into listening with headphones and one of my amps doesn't have a headphone socket, so this seemed like as good a pace to any to get started. Note also that I'm using a very basic pair of headphones right now: AKG K44s. These are no doubt looked down upon by many in this community, but with decent reviews on many forums given their super-economy price tag (I paid  about GBP20 (c.US$32)for them on Amazon). I was pleasantly surprised by the capability of the...