I've finally found a pair of truly "new" old stock early 70's vintage Tung-Sol 6550's that should be on the way soon. They are new in the box, newly unearthed from a collector. I've always loved the squatty big shouldered look of the TS 6550's, and it gives me an opportunity to put the nice Mullard 5AR4 back into the mix!
I'll try to do an admittedly flawed listening comparison between the KT-150's and the TS 6550's when I have a chance. I'll also post a pic with them installed in the Inspire.
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