Three things. Isolation platforms are not (rpt not) limited to 200 Hz. The way they work is that as vibration frequency goes up so does isolation effectiveness. Thus, for a 3 Hz passive platform the effectiveness at 10 Hz is about 50%, at 20 Hz about 90% and over 30 Hz at least 99.9%. Passive devices have a 6 dB per octave slope for the mechanical low pass filter. It follows that the lower the Fr of the device the more effective the isolation will be throughout the frequency range (of the vibration). The low pass filter has a hyperbolic function.
Two, as we now know from the Townshend speaker passive isolation video on YouTube, mass-on-spring iso platforms reduce vibrations on the platform itself, including those produced by acoustic waves. So, the iso platform is a two-way device. 🔛 As I’ve oft pointed out the top plate of the iso device can be damped using one-way devices to improve the evacuation of energy from the top plate.
Three, the audio signal is affected by vibration wherever you find it, wiring, capacitors, printed circuit boards, electron tubes, transistors, power supplies, power cords, fuses, etc. Therefore isolating as much as you can - everything - has it’s advantages
Two, as we now know from the Townshend speaker passive isolation video on YouTube, mass-on-spring iso platforms reduce vibrations on the platform itself, including those produced by acoustic waves. So, the iso platform is a two-way device. 🔛 As I’ve oft pointed out the top plate of the iso device can be damped using one-way devices to improve the evacuation of energy from the top plate.
Three, the audio signal is affected by vibration wherever you find it, wiring, capacitors, printed circuit boards, electron tubes, transistors, power supplies, power cords, fuses, etc. Therefore isolating as much as you can - everything - has it’s advantages