Mullard/RTC 5654/6AK5W black round hole plates Posted on March 10, 2015 by tubemaze (46 votes, average: 4.13 out of 5)Loading...No reviews found on the web. Read our reviews.Share this post:
Finally I was able to find a tube that I was hunting down for a long time. This tube is known as CV850 and M8100. The tube has easily identifiable plate structure with Black plate and a HUGE hole in the plate.
Sound wise, this tube is the best example of how 6ak5 should sound – rich tone, very powerful bass and beautiful midrange with an added bonus of a great transparency. HIGHLY RECOMMENDED.