kevinmi Posted June 17, 2018 Share Posted June 17, 2018 I bit the bullet and replaced my KT-88 tubes in my Latino ST-120 tube amp with vintage Tung-Sol 3 hole gray plate 6550 tubes from the 70's. I now know why they say these are the tubes that all others are judged by. 1 Quote Link to comment Share on other sites More sharing options...
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