I have 2 sets of CSA 4’s on my Foundry subs. The subs are located on a wall opposite of the FR’30’s for now and I will be getting 2 additional F12’s in the near future. Locations are still a work in progress but an array surrounding the listening position rather than alongside the main speakers seem to work best.
Back to Stack. They work. In my never ending battle with room nodes they help to calm things down. Bass just seems more solid, less of the additional harmonics to carry on. Sustained organ notes or fast fingers on a double bass stay tight, no bloom or blubber. Admittedly, dialing in the right location, output, slope and delay of the sub can effect the sound of the sub as much as the Stack footers. But, for a reasonably priced add-on, it does the trick.
I have 3 F12’s and am considering the Stack CSA-4 for them based on your advice. The 77 lb. weight is right in the middle of their range. What size threads work for these?
Did you ever get 4 subs going? I found 3 were all that I needed to reduce most room modes, but four would allow a double bass array concept. Mine are on 18" ASC sub traps, which really assist in keeping the bass and modes under control. If you get another sub, try it near one of the front corners since your others are on the back wall. I was surprised how much it changes things.
I haven’t found a final location for the 4 F12’s as my system is currently out of commission. I can say that a swarm of subs is the trend, roughly 4 corner locations. I didn’t like a single pair between the FR30’s. I’m pretty sure 8mm bolts are the correct size for the subs.
I bought 3 CSA-4 sets for my F12 subs, but the M8-1.25 threads are in customs in Memphis. Currently using the flat plastic pieces to hold them under the subs.
My system vocals and mid-range tone improved, but I lost a lot of detail and clarity with the Auva 100’s. They smoothed out the drums way too much, vs the Stillpoints that I was comparing with, so I can’t hear much a difference in low bass with these SW feet now.
The drums on music by the Who sounded like Keith Moon was playing in the room with the Stillpoints, with very fast drum transients and crystal-clear cymbals. Now the whole system is more like FM radio and lost all the wow factor. I have been giving things time to settle but can’t really tell what the subs are doing with the new feet. May try different feet again under the FR-30’s.
I’m a little confused - are you using these for the F12 while waiting for the mounting screws?
Sorry for the confusion. The Stack SW feet are on 3 of the F12 subs with the plastic flat support discs, instead of screws, which are being shipped. The speaker Auva 100 also did not have long screws in the US in M8-1.25 and so they are sending me some 40mm from UK. These will be too short to tilt speakers to ear level. The std. screws are 30mm and you can’t put the FR-30’S feet covers on as too short without removing a nut. To do what straightwire does for ear level tilting i need to order maybe 50mm adapters from somewhere.
Ah. So the AUVA 100 as currently being used is what, for you, is smoothing out the sound too much? Is that with or without the F12s in play?
For me, with or without the subs. Note i have not tilted down to ear level as many recommended,so do not rely on my experience yet. Note the Stillpoints required NO tilting to ear level. The speakers must be level in all directions, so were about a foot above my ear sitting level for the mids and tweeter panels. I will also try Gaia Titan Theis. I got a set used to check out for minimal cost risk.
I’ll be interested in this further comparison!
I have the Auva SWs beneath a pair of REL S510s and basically they enable me to have the subs working in my room to their full effect. I live in a block of flats so neighbors all around and have suffered with Bass issues in my room. The Subs helped tame and alleviate some of that - but it was only when adding the Auva SWs that the resonance that had been shaking window frames and other related issues stopped fully. My bookshelf speakers the Alta Audio Alyssas go low in the bass region already and the AUVA 100s beneath my Studio Pro stands have again provided clarity and removed some of the bass ‘bloom’ for want of a better word that I had in my room, even before bringing the subs in. The subs provided additional dimension to the soundstage and the Auva SWs took this up a notch by deepening that soundstage back to front which is now very apparent in tracks that offer that effect - some great Queen tracks on SACD are perfect for this
So far, I am pleased with the Auva SWs under my three F12 PSA subs. I need to get the rest of the system adjusted but believe these are working well to keep the bass tight with good depth.
I use 3 ASC sub bass trap stands which contribute and a couple membrane bass traps in my dedicated stereo room, too.