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Major Problems with Aleph Ono

I have an Aleph Ono on loan I am considering purchasing. The rest of my set up consists of a Clearaudio Virt. Wood MM, VPI MkIII/PT 6, ARC LS15, ARC VT 200, Vandy 3A Sig's.

The Ono sounds great, much better than the Creek unit I currently use, the problem is, when I turn the volume up to even moderate levels, the woofers in the speakers ossilate and the tonearm starts hopping off the record! I have the jumpers in for the lowest output (60 db) and am using the recommended settings for the cartridge.

I have tried different loading, resistance, cables, balanced and single-ended outputs, I even borrowed a friends pre-amp and took the LS 15 out. Nothing has changed.

Obviously this is not good. I have talked to Pass (not the Ono), the guy selling it (as baffled as I), and someone I consider an experience Vinylphile who told me to move on and buy a different stage (maybe a PH3).

My question is this. Has anyone had the problem and does anyone know how to fix it?
jmcdermott

Showing 1 response by sean

sean
6,231 posts
 
It may not be a matter of isolation so much as it is a matter of having the table positioned directly in a low frequency high pressure node. No amount of isolation underneath the table can damp the excitation of the table via air-borne means. Placing the table on the chair in front of the rack probably moved it further away from the wall, which minimizes low frequency reinforcement. Sean
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