What made you change to a 6SN7 preamp?


If you made an intentional shift toward a 6SN7-based tube preamp, what sonic characteristics motivated your move?

I have been doing some comparisons and think I have some reasons I like the 6SN7 better, but there are so many factors which could be at play, that I'm not sure what is responsible. 

Rather than list my details for others to analyze, I'd rather hear your answer to the basic question.

Tell me about your path toward a 6SN7 preamp?

What did you change from and why?

Even if, overall, the change was worth it, did you lose anything in the transition? What?

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Andy will guarantee there are as new and work , return I don’t think so

Brent Jesse has a return to fit your audio for 30 days plus you can take out up to 2 year insurance with  Brent if a tube fails for little money 

What Is Your 100% Money Back Satisfaction Guarantee? Individual service and customer satisfaction is paramount to VTS. Every tube purchase is backed by my guarantee. If for any reason you don't like the tubes, you can return them within 20 days of receiving them with generous exception if notice is given. Tubes are guaranteed 90 days against manufacturing defects with the exception of 6DJ8 type moving coil phono input tubes and certain rare models that simply chew up tubes.

What Is Your Return Policy? A decent sized square box of at least the size they were sent in is proper. Any tubes returned in padded envelopes or "little flat-ass" (video tape sized) boxes will be returned to sender and charged accordingly.

Thanks @audioman58, I should have just went to the Vintage Tube Services website.