Electro Harmonix 12AX7EH Tube

This valve was one of my two choices out of six in total, to use with my guitar tube pedals. It behaves well under all tested circumstances: from cleans to heavy metal riffs. Compared to the other 12AX7 brand, this one was *slightly* towards the high-end, *a bit* less low-end feedback, therefore I chose this one for the distortion pedal. Other than that, they are both great tubes and their sound is powerful, defined and versatile: neither too bassy, nor treble and aggressive, just by no means low gain.

Not only quality but you can trust you're being looked after by Thomann and that you're not getting ripped off! Top Marks Thomann!

Great hard rock tubes. If you like your rock and metal give these a try, I wont use anything else after finding these. They make JJ's sound cold and sterile, Tung Sols, Ruby, or Groove Tubes dont come close when compared to these, well at least to my ears for a drive tone.

Cleans are nice, chimey and lush. Although there's probably better choices for a clean tube.

Work great in in a ENGL E530, and transforms old Digitech rack tube preamps into a usable bit of heavy rock kit.

I replaced the ones that came with my amp and I got a much warmer sound with them.

I bought 3 pieces to replace the factory tubes on the HB TUBE15 Celestion amp. With the gain all the way up, they are slightly more quiet than the factory ones. These tubes should be the standard in ECC83/12AX7 amps.

Use:
Changed it with the original tube in my old mans Vox Valvetronix VT50.

The tube does it's job well - can not comment on the difference with the original as I can not hear any.

Low noise, not microphonic, good gain. Currently sitting in my SCT800, though I used it in my Vox VT50 for a while too.

As good an incarnation of the 12AX7 as you're going to get get.

Its better than the stock tube of the Bugera G5 however it is quite subtle change...however the high end/clarity seems to be a lot more pronounced and it feel a little more alive.

I used these to replace the stock preamp tubes in my Bugera 6262 infinium. There's been a lot of debate amongst guitar players wether preamp tubes really make that much of a difference in the sound of an amp. In my opinion: they do! after doing some research, these were the tubes that got preference and i don't regret that. It really tightened up my amps sound. 10/10 for me.

It works fine, not microphonic. I can't really tell the fine differences in tone between different tubes.