Great thread with lots of useful info!! I'm just about to install my flush mount speakers in the coming couple of weeks and this thread has given me some great ideas!!

I've got some AMC springs to mount my speakers on (AMC100 x 4 for ATC SCM100A with 220KG dummy load). I did a test today with just a dummy load of approx. 240KG and the whole column moved about when touched! Glad I tried it out as I had no idea what to expect with the springs...Hence finding this thread (I've looked high and low about this rather specialized area).

Now I'm thinking I'm going to have to constrain the movements of the cabinets from above like you've done Adhoc. I've got some spare AMC 50 springs with sylomer bases which I think I can rig up similarly to how you've done it with the bolts and stuff. I've no clue on how to calculate screw force etc so I'm going to rig up a little test tomorrow and measure the deflection.

Any more info/ideas on this subject would be great.






Ok so I did a quick test this morning and managed to achieve about 10mm of deflection of the AMC 50 Spring. According to their charts that should equal approx 25KG of load and isolate down to just over 5Hz (inline with the isolation from the 4 AMC 100 springs underneath). The tension/clamping created in this rudimentary test started to pull apart my unfinished mitre saw station so I'm pretty sure it'll stabilise the speakers if built solidly enough. I'm building my studio full time currently and hoping to be hearing the speakers within the next 10 days...I've got a ton of pics and will start a separate thread once I've got time (I've got a thread on John Sayers Forum but haven't updated much).

I think I've got really lucky having these spare springs and I can rig up a frame easily, thanks Adhoc, Northward /Thomas, and akebrake for the inspiration and solution to a problem I only just realised I had!