Elevating subwoofer about two feet off the floor

Uh, there is no 20 Hz information on virtually any recordings. Most people are lucky if the get flat FR down to 35 Hz in the room. Putting the sub on springs greatly reduces energy of all frequencies transmitted from the sub cabinet via the floor to the front end electronics. This is especially true for speakers and subwoofers since the Fr of the iso system is much lower than the lowest frequency the speakers or subs can produce. By the way, as shown in max Townsend’s YouTube video, isolating speakers or subs reduces cabinet resonance as well as isolates front end equipment. Two, two mints in one! 🤗

Have your cake 🎂 and eat it, too. Isolate the subwoofer with springs. Then you isolate the front end electronics from mechanical feedback AND take advantage of the proximity to the floor. Problem solved! 🤗 I’m pretty sure isolating the sure also reduces cabinet resonance. Three, three mints in one! 😀

The farther the subwoofer is off the floor the less the magnitude of vibration force the subwoofer transmits to the floor and thus to electonics, turntables, CD players, etc.