Mullard M8136/12au7 Box plates England Posted on March 8, 2014 by tubemaze (47 votes, average: 3.36 out of 5)Loading...No reviews found on the web. Read our reviews.Share this post:
This tube is a sister tube of M8137. It exhibits the same sonic characteristics – transparent, dynamic, with awesome bass. Fantastic tube if you are looking for a modern sound. Not much coloring of a sound, but still, a great sound stage with a touch of warmth.