Similar to Bobspeak's suggestion, putting heavy equipment like large speakers on cardboard makes changing their position much easier. Don't lift them. Instead, lean them over and slip the cardboard underneath. Take the spikes off first or this won't work.
I also acquired a hand truck (aka dolly) that has two sets of wheels. It can be used upright or lay down depending on the need. Great for manuevering tall objects under low overhangs and through doors. Lastly, a piece of carpet to put between the dolly and equipment to avoid scratches is a must. Cardboard works in a pinch.
I also acquired a hand truck (aka dolly) that has two sets of wheels. It can be used upright or lay down depending on the need. Great for manuevering tall objects under low overhangs and through doors. Lastly, a piece of carpet to put between the dolly and equipment to avoid scratches is a must. Cardboard works in a pinch.