Amazon.com: Audiocrast 4PCs HiFi Speaker Isolation Feet Shock Absorber Pads IF4023B Black Stand Feet 40×23mm Aluminum Vibration Dampener with Balls for Audio Speaker Subwoofer CD DVD Amplifier Turntable DAC : Electronics
4X DIY Rubber Speaker AMP CD Isolation Damper Feet Stand Subwoofer Pad Foot Tool | eBay
Speaker Stand Feet Pad Aluminium Alloy Metal Spikes Cone Floor Foot Nail Speaker Subwoofer Amplifier Stand M23*20 1/2/3/4pcs - Speaker Accessories - AliExpress
Amazon.com: 1.5” Bigfoot Isolation Feet - Non Adhesive Rubber Stoppers - 8 Pack Non-Skid Rubber Bumpers for Turntable Isolation - Anti Vibration Pads - 50 Duro : Electronics
SVS Subwoofer Isolation feet compared to standard feet. Looked promising, but made little to no difference in rattling on mantle/walls/etc. : r/hometheater
Hudson Hi-Fi IsoBlock Silicone Isolation Feet - Speaker and Subwoofer
Installing the feet on a custom 15in Rythmik subwoofer by Salk Sound.
SubCone Isolation Feet for Subwoofers and Medium/Large Speakers - 4PC