Rating tubes can be a tricky thing. I can guarantee there probably aren't too many preamp tubes you could mention that I haven't tried out including many NOS, 12AU7, 12AT7, 12AY7, 12AY7WA, etc. I didn't have very good results at all with this tube in bigger tube amps (e.g. 100 watt Marshall TSL100) but after trying out literally dozens of different type tubes in my small 1 watt tube amp (Hughes & Kettner Blues Master) this tube outshined the rest in regards to the tone I was after and I am a tone fanatic. I give it 5 stars easily :)
Rating:
[5 of 5 Stars!]