John,
I've been playing around more with the VibSensor app, and noted that the Power spectrum is very informative. It returns a summary table of data, and also a plot.
Summary table:
Peak raw: X (0.78) Y (0.55) Z (15.45)
ISD: X (0.05) Y (0.055) Z (0.32)
Resonances:
X:
Y: 22 Hz (0.00037), 45 Hz (0.00025)
Z: 44 Hz (0.0065)
Shown here is the Power curve* from VibSensor of my Schiit Gumby DAC sitting on 1) in blue the stock Gumby feet and 2) in red on Herbie's Audio Lab Tenderfeet. You can the stock feet impart more total power into the DAC.
*-The force is imparted by a home-made "slide hammer" I made with a bolt that is only partly threaded, a lock nut that serves as a stop, and a 1/2" drive socket. I drop the socket onto the rack from a set distance from the lock nut to control variance in the force imparted. It drops 8 centimeters from the locknut on the bolt onto the head of the bolt which is resting on the audio rack shelf.
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Lumin P1 streamer/DAC/preamp, Constellation Inspiration integrated TT: Michell Gyro SE MkII, SME V, Koetsu Urushi Vermilion, EAR324. Harbeth 30.2s, REL R-305, Shunyata Alpha V2 ICs, Alpha V2 SPs, Sigma XC, Sigma NRv2, Omega QR-s & Alpha NRv2 PCs, segmented Altaira SG stack w/ Alpha & Omega CGCs, Everest 8000 PD. Remote Server Room: Uptone EtherREGEN, AfterDark Master Clock & LPS, Alita, Battle Angel, (Akasa NUC Roon Core), iFi DC Purifiers (for SMPS used for Alita & router), Shunyata Gemini combo power distributor & Altaira-type CG GP-NR hub, Venom & Alpha CGCs, Shunyata NRv14 power cords for digital components.
Last edited by Puma Cat; 01-25-2020 at 02:11 PM.
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