Sylvania 12au7 Short Black Plates Posted on May 3, 2012 by tubemaze (4 votes, average: 3.00 out of 5)Loading...No reviews found on the web. See our reviews… Share this post:
Hmm. As much as I like Sylvanias, I felt that this tube didn’t deliver the sonic performance of other tubes. The tube that I tested was average, garden variety 12au7 with pinched black plates – not the earlier wide, long one. The sound was OK. It was warm and bold, but it didn’t deliver in HF extension. Impression was that the sound was muffled and the feeling of presence and large soundstage that is accompanying tube amps did not materialize. Big disappointment. There is really no need to buy this tube when there are so many awesome tubes out there and that don’t cost much more than this Sylvania.