Buying the right machine for your weight type
First, everyone wants a heavier machine. Heavier machines have less flex to them and actually shake more unless they are so heavy that a company adds 70 pounds of weight to it to prevent it from shaking.
Put it this way, if you want a super quiet machine and the machine is only going at 14 hertz, it shouldn't make that much noise anyway. The Vmax Pulser and Vibratrim Vt500 are almost 158 pounds and they are whisper quiet and because they are so heavy they don't vibrate across the room. The weight of the machine also dampens the floor vibration.
The Zaaz 20K machine, is super light weight but has a different type of motor that can handle heavier weights. After all, if you Google Zaaz Studios, you will find them in hundreds of studios where people pay to use them in their studios. The Hypervibe frame has flex to it so it absorbs excess vibration in a different way.
Basically, the weight of the machine does not make a difference in how the machine can handle the weight of a person. The wattage also is not important as much as the amperage and voltage. My freakin hair dryer is 2200 watts. So a machine having 1000 watts or 500 watts only matters if the voltage and amperage is high along with it. The Zaaz 20K is only 400 watts and is actually the next most powerful machine under the Hypervibe at 900 watts.
A heavier person will draw more amperage out of the motor so if the machine is low amperage the motor will get hot and I don't know of any warranty that covers it. Beware of fake weight limits. If you call the company on Alibaba, which I have done, many have a 265 weight limit and importing companies stick a 400 weight limit to make people think its a better and more powerful machine. Meanwhile the motor has aluminum wires, not expensive copper windings in the motor. Most of the cheap machines everyone seems to buy on Ebay for 249 bucks have aluminum wirings and minimal amperage. But, oh guess what, they all seem to be 1000 watts. A Hypervibe doesn't even have 1000 watts and thats 10 times the price. Go figure.
Note: with low powered machines they rarely, if ever, can support the maximum weight limit it claims. Oh, it probably can if standing on your toes. Try standing leaning back on your heels on one of those machines. Just make sure you can return it if you don't like it.
Make sure you compare the specs with your weight when you get it. If it says it goes to 10mm amplitude, just hold a pencil on the edge of the plate and put a piece of paper next to it. See if it gives 10mm amplitude when you are standing on it.
See my video below for how to do this.
For people over 200 pounds, I recommend a heavy machine (around 150 pounds) or a light weight machine that has lots of flex. The Zaaz 20K and Vibeplate are built for studio use and should hold up the longest with heavier people. The Vmax Pulser is the strongest of the spiral type machines. The spiral motor is much more powerful in theirs than any of the spiral models I have tested. I have reviewed the Genesis as wells as the Vibra-Trim VT500. These are all made in the same factory but each importer can choose the motor as well as types of components inside.
Remember, with heavier weight people, if the motor is not powerful enough, it can still move a person but the G force is diminished and the motor has to work harder. This is why many motors burn out and are not covered by warranty because its hard to prove there was a manufacturer's defect.