VPI Prime Sig/Lyra Delos / Feedback ...help!


Hello all, strange one here...just picked up a VPI Prime Signature Rosewood and a Lyra Delos with about 20-40 hours on it...sounded great at low volume with my sacred Steely Dan - Aja Cisco pressing . Later that night at higher volumes I'm getting a midrange-low feedback . 

Here's my rig : 

VPI Prime Sig with Unipvot / Lyra Delos 0.6m output voltage / 1.75 tracking force

Allnic 1202 Phono Pre (variable DB boost  +22, +24 , +28, +32) 

Manley Snappers / Jumbo Shrimp Pre 

Harbeth 40.3XD 

So I A/B'd w the old turntable VPI Prime Scout / Unipivot / Hana ML 0.4 Output and all was fine 🤔 I then swapped arms moving the Hana to the Prime Sig , no feedback ....🤔

I've tried adjusting the Allnic (all 4 levels mentioned above) and get feedback with the Lyra on every setting...

The hifi business I purchased from said they had tested thoroughly and had 0 problem with it ...so I'm perplexed , this doesn't seem to be any vibration feedback , is the Lyra just not jiving with my Phonostage for some reason? 

Any help appreciated ...

 

128x128tommypenngotti

@mulveling 

I think Im chasing ghosts here...rabbit hole of trying to isolate came up with Hana ML & metal tonearm (which does not feedback) just looking for best possible isolation. When I get the Lyra back I'm going to switch it from the 3D printed arm to the metal arm to test...but I think I already know the answer 😃 plastic vs metal. 

end result - 

received completely rewired arm back from VPI and it works fine with Lyra now 

2 variables : 

1. Changed out to HW-40 feet 

2. Moved TT to middle of cabinet away from speakers

So ,something weird with the wiring causing the original problem-feedback?

Good to see you can now enjoy the setup.

CRANK IT UP!