SVS Subwoofer Isolation feet. Will I lose bass?

@geoffkait then how do you explain significantly less db at 20hz -  80 hz?  That's not "better" it's just quieter.  So of course there's less perceived boominess and distortion.  

Check out the video that shows his testing and measurements with/without feet as well as ported vs sealed..


UPDATED Subwoofer SVS Isolation Feet vs Rigid vs Foam Testing
https://www.youtube.com/watch?v=7uEdZ6KMuLM

After listening to this very interesting Townshend video....

https://www.youtube.com/watch?v=OZxi1oZfvDA


I think I will go if I want to stay with homemade solution with my sandwiches of different materials: quartz feet+granite plate+sorbothane+granite plate+corkplate+bamboo plate, but I will add a quartz sand bed in a bamboo box under the speakers and on top of this sandwich....I will use a mix of quartz sand with 2 different size for the sand peebles...


I cannot design a "damped" system of springs adequately myself to controls resonance....The explanation why is in the video...The price to afford them exceed my purse....And it is more fun to recreate, invent, and experiment ourselves....


I think the quartz bed will controls some resonance too....Perhaps not like a damped springs system but surely approximating it, quartz sand+small peebles will dissipate vibrations resulting from resonance in heat and it is more simple to make for me....

Only with my loaded(70 pounds on each one) speakers and the sandwich I had already now give me good results....The quartz bed will help with resonance better than only the sandwich....

dtximages OP
@geoffkait then how do you explain significantly less db at 20hz - 80 hz? That’s not "better" it’s just quieter. So of course there’s less perceived boominess and distortion.

>>>>I prefer not to try to explain things that don’t make sense. What would be the point?

my experience soft vs rigid is similar to the video.  the best sound achieved on my carpet over concrete floor is when the spikes pierce the carpet and make contact with the solid floor, speakers and subwoofer.  

I already explained why carpets are bad Gnus. 🐃 🐃 Besides, this discussion is really about isolation vs spiked or soft, not spiked vs soft. If the SVD isolation feet are some kind of rubber they aren’t providing real isolation, anyway. A lot of companys call their feet isolation feet but they are really dampers of some sort. What I call real isolation is mass on spring devices, you know, air springs, air bladders, even squash balls, inner tubes, but especially steel springs. So, in that light I’m not surprised by the YouTube test. I would not say SVS are comparable to real isolation devices. Get real.