A friend of mine, GH, turned me on to a much less expensive alternative made out of furniture cups and ball bearings. Bought the parts on Amazon for around $15. They are:
Slipstick CB605 Furniture Wheel Caster Cups / Floor Protectors with Non Skid Rubber Grip (Set of 4 Grippers) 1-3/4 Inch - Chocolate Brown
Ten 3/4" Inch Chrome Steel Bearing Balls G25
The ball bearings sit just above the top of the cup. I use four for stability. I’ve tried them under an Oppo 105 with a mild improvement. I also used an Ikea Butcherblock cutting board underneath the cups/bearings. I also tried blocks of maple on top of the cutting board instead of the cups/bearings but the maple wasn’t as good as the cups/bearings.
I have an Aurender N10. The isolation on that component is not very good and it picks up significant vibration during spirited listening. The cups/bearings work very well in this application. Not exactly sure how much sound improvement I’ve realized since I’ve never removed them. But I can tell you that nearly all of the vibration during modest to loud volume is removed as tested by resting my hand very lightly on top of the N10. If you put weight on top of the player, such as a heavy hand, it picks up the vibration; so the isolation on top of the circumference of the four ball bearings seems to work well.
BTW, if you look at the Ingress Engineering product, the cup/bearing method talked about above is the same concept.
Slipstick CB605 Furniture Wheel Caster Cups / Floor Protectors with Non Skid Rubber Grip (Set of 4 Grippers) 1-3/4 Inch - Chocolate Brown
Ten 3/4" Inch Chrome Steel Bearing Balls G25
The ball bearings sit just above the top of the cup. I use four for stability. I’ve tried them under an Oppo 105 with a mild improvement. I also used an Ikea Butcherblock cutting board underneath the cups/bearings. I also tried blocks of maple on top of the cutting board instead of the cups/bearings but the maple wasn’t as good as the cups/bearings.
I have an Aurender N10. The isolation on that component is not very good and it picks up significant vibration during spirited listening. The cups/bearings work very well in this application. Not exactly sure how much sound improvement I’ve realized since I’ve never removed them. But I can tell you that nearly all of the vibration during modest to loud volume is removed as tested by resting my hand very lightly on top of the N10. If you put weight on top of the player, such as a heavy hand, it picks up the vibration; so the isolation on top of the circumference of the four ball bearings seems to work well.
BTW, if you look at the Ingress Engineering product, the cup/bearing method talked about above is the same concept.