Are big-bowl stand mixers always heavy?

Not across brands. Each figure is the maker's own: Hamilton Beach gives 300 to 450 W on four of its five, NutriMill 500 W, Breville 550 W and Ooni 650 W, while Wolf Gourmet states the same wattage as MAX, a different kind of figure. None of them measures torque or dough performance, and bowl size isn't dough capacity, so follow each maker's batch limits.

Speed counts are each maker's numbered settings, from 6 on the Hamilton Beach 6 Speed and NutriMill Artiste to 58 on Ooni's Halo Pro, and they don't describe the usable speed range. Wolf Gourmet and Ankarsrum give no count, so a minimum speed setting can't include them. Weight has gaps too: Ankarsrum's Assistent Original and Breville's Bakery Chef give none, so a weight limit can't count them as a match. Hamilton Beach’s 4 to 5 qt mixers span 6.88 lb for the 6 Speed to 20.15 lb for the All-Metal. A small bowl can still mean a heavy lift from a cupboard.

They're all shown in US quarts. Ankarsrum gives a 7 litre bowl, about 7.4 US qt, and the others give quarts. This comparison has no width, depth or height for Breville's Bakery Chef or NutriMill's Artiste; check each maker's current dimensions before choosing a storage spot.