Quiz about adding dense mass to a vibration isolation application!

My experience is very different. Vibrations affect everything to some degree. I hear quite a difference isolating my front end components as well as my amplifiers with springs. Granted my DAC and preamps use vacuum tubes but my amps are solid state. I also have experimented with different materials for the boards that the components sit on as well as having them sit directly on the Nobsound feet. I have tried granite (terrible), wood, carbon fiber and HDPE (High Density Polyethylene). Woods work well but I found the HDPE boards seemed to have a slight edge over wood under my preamps.

I have cable elevators too. Unfortunately, I could hear a difference with the cables lifted off of the floor. I made my own cable elevators on the cheap. I used electric fence ceramic isolators supported by rubber bands stretched between two dowels pressed into 4x4 wood boards. Seems to work.

I use the VibrationAnalysis app on my iPad and iPhone. The frequencies are accurate but the magnitudes are for reference only and can only be used for comparative purposes. If I were still working I would be able to compare the magnitudes with a calibrated accelerometer in the lab at work. I know that the FFT analyzer app was dead on with frequency using a calibrated tone from a B&K tone generator but I was not able to verify the magnitudes so they are reference only as well. The iPhone and app work very well and is quite sensitive. Even the lightest of footfalls from several feet away can be detected.

@tomic601 LMFAO! Read this while on a boring conference call and laughed out load un-muted.

King Spring is on vacation or hopefully banned…

@jerryg123 Glad to be of service !

@bugredmachine Finally…somebody who knows what a shaker table is ! i always dread that first test of a stacked payload and buss. Not because i thought hardware would fail but because as the “ shop guy “ clouds of FOD , etc often…appeared ..

NAIM components isolate the IEC inlet :-)

For the cable guys, activated carbon open cell foam makes an inexpensive and effective cable riser.

Jim

Nothing pisses off the lab manager quicker than parts flying off of hardware set-ups or un-godly screeching from unexpected resonances. Fun, fun, fun.