There is no way I can often use couple hundred watts amp+cabinet for practicing in my apartment. But still, I plan to use amp head DI for home recording and practicing with my headphones. Is it absolutely necessary to connect speaker load prior turning the amp on? Its a hybrid type of amp (Hartke LH500), and I found few opposite opinions, but I need to be sure, not to risk or damage anything. Also, if I have to carry that heavy box up and down regularly, is it at least possible to keep it turned down silent all the time when practicing? Still don't want to try my chances with overheating and such many thanks!