One other thing I forgot to add. Randall said they have switched to "ultra soft" isolators (from just "soft") and the price for the new isolators has gone up to $35 each from $10 each for hte older soft style. I forget the exact rationale but he said the newer softer style ones will help transmit ULF through the furniture better. On a positive note, when buying a complete system, the isolators are automatically upgraded to the new ultra soft style at no extra charge. However, ordering more it's $35 for ultra soft or $10 for soft. I've seen the link to the Amazon ones for $9 which he says are a bit harder. With 16 legs in my sofa sectional, 4 actuators and 4 included ultra soft isolators, I'll need to buy up to 8 more isolators if I want all 4 separate parts including my ottoman of my sofa to rock and roll, or just 4 more if i want to double up on actuators on one section and leave another with none. Frankly, I'm having a hard time stomaching paying $35 each for some rubber feet, so might order 4 of the older style for ottoman and/or lesser used sections to compare and then decide on the next 4 isolators later. 8*$35 for rubber feet is starting to sound like those "ultra platinum hybrid HDMI cables" for $300 and 6ft run...
I'm happy to test out the 501-D that comes with the level 3 system for ~$480 net cost as I mentioned a few posts back, with just 1 or 2 actuators connected and see if there is a noticeable strength drop off when connecting the 3rd/4th actuator. I'm sure nobody thinks the 501-D might be under powered for just 1 or 2 actuators so this should give me a good sense if 125w across 4 actuators is adequate, what type of headroom exists on actuator count, or if you do need 250w or even 500w each. I'm not looking for a themepark ride, but I agree it's better to have headroom (especially if it's the same or cheaper price) than not to have it. If I'm not pleased, I can return the 501-D within 30 days and/or buy a stronger Inuke or Buttkicker to compare it too before 30 days to make a decision.
On another note, it sounds like it's quite easy to move transducers/isolators across different pieces of furniture. When it's just me or me/wife watching a movie (most of the time) I can have 4 actuators on the pieces of sofa we are actually using for a more balanced and/or stronger effect, and when guests are present I can easily enough move the isolators/actuators under the feet of the other sections. Alternatively, I slide the sofa out of the way, move in my favorite leather chair, and put 4 actuators under each of it's legs
ETA: Anyone giving preference to the 501-D for it's 5hz rated FR? Again, presumably the 10hz rated buttkicker actually rolls off at 6hz, but not sure how consistent that is or the anecdotal points might be for a unique unit? Not sure what the FR on the inuke 3000 / 6000 is?