I loved the ops1 mk4 I had. With the right tubes (Windmill getter 5751's and good quiet NOS 6922's, and a good Ac cable)... It was quiet, big stage, dynamic, wet, palpable, detailed too. Great deep bass soundstaging and hall info. A winner and a bargain when purchased used. But you need a cart with at least .5mv output (or a step up tranny - I have yet to hear one I like a little bit), and a single ended system. I would not put it before a balanced preamp/amp combo. The opsmk4 bettered a Xono and JLTI head to head here.
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