just received my DSL1HR now, and test it's functionality without an external cabinet (ordered but not arrived yet), so tested only with my headphones AKG K240 MKII. I noted that the volume is very low even with the volume knob at maximum level and switching the power 1W-0.1W I don't feel any difference, in both channel !
seems that only 0.1W is allowed when external speaker is disconnected. Is it broken or is it normal ? awaiting for a kind urgent fast responce please.
The power function on the 1 watt does not effect the output on the headphone sockets,the level on the headphones is the same as the low power. The way you have described the amplifier it sounds like it is working as normal.