Here is a lamp of high quality, able to bring in V1 position, a real difference.
Tested on a good old Fender Hot Rod Deluxe U.S., this Ruby gives a softer color channel "Drive" and "More Drive" and also brings more gain. While retaining the beautiful features of the combo.
Many 12AX7 I've tried (JJ, Tung ground TAD Electro Harmonix or Sovtek), it seemed to me the most compelling and long remained in place until I finally unearthed my reference kit: 3 Groove Tube Matched paired SAG-FHG.
And it was thanks to the Ruby I could perfectly define what I needed, based on the fact that a high gain AX7 satisfy me fully V1.
I can only recommend!
Wahoo the difference!
It provides a big win while being very dynamic.
I play mostly metal so heavy distortion where precision is very important.
I climb into a VOX ad100VTH to replace the original lamp Electro Harmonix and I must say that the preamp section was up a notch!
Sold at € 20 www.audiotubetech.com
Note that HG + series are the high end at Ruby, the microphone is the smallest of their catalog.
ps: I ordered one but AC7 HG + HG + AC5 received without realizing it now, so I naturally tried.
If they send me an AC7 HG +, I will not fail also to give my opinion