Electro-Harmonix 12AX7, Matched Pair

llego en tiempo y forma funcionaron perfecto buen sonido en mi ampli estaba muerto y revivio

I love how these sound in my Tube box Pro-ject phono amp, but my matched pair only lasted about one year. I've gotten three or four years out of other tubes; maybe I was just lucky, or got a set that was not fated to live long. Also, they went out immediately. One evening they worked great; the next morning nothing but static distortion from my turntable. No slow death. Would recommend, but be aware that you may end up replacing them every year.

These went into my stereo pre-amp and sound open and natural. Very nice. I think they can be bettered by American NOS tubes … if you can find them and/or afford them. But this is my go to tube for every day use.

Bought these to replace a NOS set of RCA blackplates on my Rogue Audio amp and I must say these are incredible impressive for the price. This is not my first use of new production EH tubes, they are excellent sounding with a clean/clear sound. I don't know why people still pay top dollar for vintage NOS stuff, I suppose they're trying to fine tune and dial in an exact sound. For the price, you can not beat these as well as the new production Tungsol.

I replaced the output drivers in my Korg EMX-1SD with these tubes. Without any adjustment the signal is now clean (no his or hum) and stereo balanced. Great value.