I owned a Vincent SV-226MK and the tubes were not soldered in. Wish I had not sold it. They are made in China to Vincent's specs and parts choice. May by a company (forgot name) that is known to produce a fine chinese product.
I have never owned the SV-237MK, however, based on my experience with the 226 and feedback within this forum I believe it to be a great integrated in it's price range.
I have never owned the SV-237MK, however, based on my experience with the 226 and feedback within this forum I believe it to be a great integrated in it's price range.