ELP laser turntable - any comments?

I would have to guess, I have never weighed it. Probably between 400 and 450 pounds.

I did not see the model that supports 700 pounds. Guess I should have another look at the site.

The Minus K BM-1 has 0.5 Hz Horizontal and Vertical resonance, whereas the BM-6 has higher resonance frequencies. The BM-6 is like an air table (but without the air). The BM-1 is unlike anything else when it comes to isolation, outperforming pretty much everything.

Rumor has it that Minus K has a low profile model with 0.5 Hz Horiz/Vert in the works. But I imagine the payloads will be insufficient for the Walker.

Useridchallenged, I think this is the sophisticated controlled spring isolation base. Versus the acoustic feedback unit as the Stereophile show. It was from Halcyonics. Do you know if this is correct?

The Minus K products are based on their patented Negative Stiffness Technology. From a physics point of view, the spring equation is F = k * x, where k is the "spring constant" or "stiffness". Minus K gets their name because they have found a way to implement "negative stiffness" or "minus k" if you will. So, yes, the Minus K system is based on a sophisticated mechanism that includes springs.

I know little about Halcyonics except that it is an active isolator (hence it requires feedback). I just went to the Halcyonics website, and checked their specs, and Minus K still outperforms.

The Minus K set-up is pretty easy, you just dial in the payload (literally, there is a knob and a payload balance indicator), and you're done. It looks like the Halcyonics requires software and other tweaking to make it work.

Albertporter - does the weight of the Walker include the air isolator? Or is the 400 lbs just the platter/bearings/plinth/tonearm/motor? If you replace the air isolator with the Minus K isolator, you will probably strip out a lot of weight (and wires, and pneumatics) and probably save some space, too. I would imagine that the Walker platter/bearings/plinth/tonearm/motor would be well under 200 lbs. I know that my Yorke is about 75 lbs, which includes a 25 lb platter - all the rest is bearings/motor/plinth.