“Absolutely wonderful sound! Enormous sound stage. Super articulation without any harshness. Tight Bass. Possibly my favorite Black Plate.” Read
“Great gain, perfect clarity and frequency response. Awesome! Our favorite American NOS 12AX7.” Read
“The RCA/ Tung Sol 12AX7 Long Carbonized Black Plates with Sq. Getter NOS 1947/49 and later versions produced between 1950/56 are the best sounding options available – Period.” Read
This is a fantastic tube that is very rich and warm, which could be a disadvantage for some, since the sound is not perfectly balanced, it really depends on the specific sound you are going for. To use a coffee analogy, it is like a Sumatra roast, offering a very dense, complex, and strong flavor palette, but without the bitterness of a French Roast. I am not going to write extensively about this tube, as it has been written and rewritten about many times. It is highly recommended if you are looking for a dark, warm, and vintage sound.
* Sound Profile: Deeply rich and warm, leaning toward a darker vintage character
* Flavor Analogy: Dense and complex like Sumatra coffee, smooth without bitterness
* Balance: Not perfectly neutral, but excellent for specific tonal preferences
Final Verdict: These are highly recommended for listeners who prioritize a lush, warm vintage atmosphere over a strictly balanced or modern sound.