All my comments are about the Gaia by IsoAcoustics.
fossada, from what I understand the 225 lbs is not a limit but is the top of the optimal range of the performance. From there the performance will start to be reduced. So if I understand correctly you would get most of the benefits. But you should check with the designer to get the exact skinny as I am not sure what is the weight limit on the Gaia I vs the other two Gaia models.
All others:
I have tried many types of isolators and/or vibration control over the years. Most did make a difference but they also made a negative overall impact in the sound. So not worthwhile.
Only a few made a worthwhile improvement overall.
This is whether under a speaker or equipment.
I recently had the opportunity to try the Gaia under various types of equipment and can highly recommend them.
I tried the Gaia in three different systems and with several different audio buddies. They were tried under several types of equipment.
From a passive preamplifier, active preamplifier, two phono preamplifiers, two DACs, and several amplifiers both stereo and mono blocks. Price of equipment ranged from a few thousand to over twelve thousand dollars.
All agreed that the Gaia made a positive overall improvement in every case.
Now the Gaia were just placed under each of the equipment (three Gaia per equipment) so there should be a slight additional improvement using them attached and in place of the equipments original footers.
I also want to add that we tried them under a passive type power conditioner that already has anti-vibration built into it. Again it made an improvement.
I hope this helped.
Al Mirabella
Ambassador, Sound Galleries & Taiko Audio
Sound Test USA
a.mirabella@soundtest.info
PS at this moment I have no financial interests in IsoAcoustics.