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Sophia Electric Royal Princess 300B and 6SN7 Tubes Review

Click away now if you are of a sensitive disposition. This isn’t going to be pretty. It’s a story of the pursuit of audio perfection (so we know already it will end in tears), a story of decisiveness in adversity, of capitalism and market forces in the raw, of Western …

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Sophia Electric Royal Princess 300B Output Tube Review –

…An examination of provenance, quality and production costs in the murky world of audio tube manufacture I recently bought a quad of Sophia Electric Royal Princess 300Bs (shortened to SERP hereafter) and found that, to my ears and in my system, they perform better than even vintage Western Electric 300Bs, …

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Psvane T-Series MK II 300B and 6SN7 Tubes Review

By volume, Chinese manufacturers dominate the world market for new valves. Shuguang claims that it alone produces 80% of 300Bs sold today – and Shuguang it is not the only vacuum tube maker in China. While Shuguang does have its own premium level products in the shape of the Treasure …

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