What's the heaviest speaker you've ever owned? What's the tallest?

B@W Matrixs 800 245lbs each over 6 feet tall

Klipschorn. The second was Reel to Reel Designs Legacy Classic. 

Tallest - Maggie 3.6

Heaviest (and the best) - Koss 1a

These 200 pound beasts were full range electrostatics (down to low 30’s with no dynamic drivers) were also the best I’ve owned.

One of the sadly forgotten speakers from the late 70’s. Any planar fan who has not heard these, is missing out on a true classic. No question in my mind, they would still be an audiophile speaker to recon with.

They had an easily fixable bass hump at 50 hz (load up the inside of the cabinet with plasti-clay to dampen the resonance). They also did not have any serious volume limitations. They could rock.

My current speakers are the biggest and heaviest I've ever owned. They're 91" tall, and I forget the combined weight of each speaker stack but I believe it's around 600 pounds. These are modular stacks of mostly bass horn rather than solid monoliths. There'd be no way to get them in the house if they were solid.

Elac Adante AF-61s my current tower speakers, are 52” tall with spikes and over 100 pounds each. Not exactly behemoths but by far the largest and heaviest speakers I have owned.