Ken-Rad (GE) 12au7 Long Black Plates Posted on June 10, 2012 by tubemaze (12 votes, average: 3.75 out of 5)Loading...No reviews found on the web. See our reviews.Share this post:
Another cool tube and again from Ken-Rad from late 40s to early 50s. This tube was exceptionally strong with all signs of being NOS. Sound wise, it didn’t impress me as much as 5814 did. It had nice warmth in mids as all black plates do, but it was just not transparent enough – there was a feeling that there was a veil separating me and the performance. I would guess it was due to an early roll of in HF. Good tube, but not one of the best.