to the OP, as with anything your mileage may vary, so I'd recommend finding a low cost way to test this if you are interested in how sub isolation might affect your sound. Either find a place to buy with a return policy or buy them used at a price you can then resell at.
I'm using isoacoustics feet on my Martin Logan towers to good effect (and well worth the $) but when I tried using similar isoacoustic pucks under my ML sealed subs, I found they made the subs sound horrible. I actually thought I had a woofer that had gone bad as I was getting audible distortion from them. I removed the pucks and the sound returned to normal.
I don't have a detailed explanation as to what caused these particular subs to react so negatively to this particular product in my room, but suffice to say that these types of products can impact the sound and sometimes that change will be positive and sometimes it will be negative. I think you just have to try and let your ears tell you whether the change was better or not for you.
I'm using isoacoustics feet on my Martin Logan towers to good effect (and well worth the $) but when I tried using similar isoacoustic pucks under my ML sealed subs, I found they made the subs sound horrible. I actually thought I had a woofer that had gone bad as I was getting audible distortion from them. I removed the pucks and the sound returned to normal.
I don't have a detailed explanation as to what caused these particular subs to react so negatively to this particular product in my room, but suffice to say that these types of products can impact the sound and sometimes that change will be positive and sometimes it will be negative. I think you just have to try and let your ears tell you whether the change was better or not for you.