Recent content by coby_rumblewood

Think this calculation is right, natural frequency shouldn't be a worry then. fn=1/2pi sqrt(k/m) Spring constant for compression of cylindrical elastomer: k=AE/L Eneoprene rubber=800 [psi] Acontact=(OD/2)^2-(ID/2)^2=pi/4 * (OD^2-ID^2) Acontact=pi/4 * (5/8^2-1/2^2) Acontact=0.11 [in^2] k=0.11...

That makes sense, thanks for the analogy. Have chosen 1/4"-20 vibration-damping sandwich mount made from neoprene rubber. Its max capacity is 31 lb per mount. The subwoofer enclosure I estimated to be 40 lb. Should I drop down to 8-32 thread size with max capacity of 20 lb per mount? My...

This is good material, thank you for the reference. I think General Purpose Vibration-Damping Sandwich Mounts with Studs is exactly what I am looking for. Can just put lock nuts on top and bottom of plates. Guessing you want the natural frequency to be lower than 20 so the subwoofer doesn't hit...

Makes sense, I'll switch it over. Thank you

Thank you! Didn't want to go with 1/2" and the isolating rubber washers are 1/2" and 1/8" I think. #4 fits 1/8" well. Haven't thought about if strong enough yet

The floor is 0.75" thick plywood and on the ledge of 1.75" frame pieces. It should really be solid to take that force. Maybe it is obvious, but could you explain why this will transmit more force and what type of force? I figured they are the same stiffness because of same 30 duro material. Are...

I have an acoustics question regarding mounting of a subwoofer enclosure, here is wireframe view of situation: I have a sealed subwoofer box lets assume it is running high power 250 W RMS. It has flanges that come out that have 30 Duro Isolating Pads between the flanges and the base board...