Nice little tube, running with the two JAN-Philips 12at7wc. Sweet together, nice team. Was running JJs. These guys are sweet music, JJs are my spares.
By Tizman from Toronto, Canada
Solid tube with great sound
I use this tube in a DIY 4S Universal preamp. This preamp can use many of the different 12 volt nine pin tubes, such as 12AX7, 12BH7, 12AT7 etc. In my application, it is my second favourite after GE 12AU7 clear tops. It is a very clean sounding tube that doesn't color the sound, and it is very resistant to microphonics. I would describe it as being honest to the source material. The clear tops are great, but I suspect it is for what they add to the music that isn't actually there originally. So clean and not euphoric is how I would describe them. In a good way.
By Beaumont from Budapest, Hungary
I agree with Anlog Dog. After 200 hours burning in the sound remained too hard. Like listening to a solid tate amp instead of a tube amp.
By Analog Dog from SF, NM USA
Pretty rugged, OK sonics.
I bought 5 of these back when they were $5.00 a pop, for the input of the linestage of my old QS full function preamp. For whatever reason, that preamp tends to be hard on the 12AU7 tube; even the manual states that if things start getting noisy, trying replacing that tube 1st. In this application, the sonics are OK. Tends to hold up better than stock 12AU7's but I still will have to replace this tube before I do all the others, in this preamp. You need something rugged, not microphonic in a 12AU7, this is your tube.