Another topic would be heavy combo amps, (like Fender's & Marshall's etc...) with closed or open approx. 50 watt combos? Personally I make separate enclosures for reasons of weight. Like I don't have the kind of strength I used to have from the time I was stronger 10 years back from now being 68 now. So, separate cabinets means 2 trips, but now I can bring a better set of speakers that combos don't provide or better enclosures if you want open or close cabinets, horns, tweeters, induction systems etc... Or a direct boxes and forget about tube amps and carry tube imatination boxes, close enough, but a system with no feeling missing from how you really want to hear your sound? What do you think about your sound and how to want to use what?