Bought a Hafler DH-200 last week, seller said he had been using it regularly until about a week before he put it up for sale. In my system, sounded sweet but got hot driving Maggies. Not egg-frying hot, not hot enough to burn my hand, but hot. Whereas, when driving just headphones (Stax with the SRD-7SB box) it was only warm. Normal? Again, the unit sounded terrific.