After having some issues with my 67 Fender Pro reverb lately its finally in tip top shape. I decided to completely retube it with fresh tubes. I ordered 4 12AX7 (Tung Sol) and 2 12AT7 (Jan Philips) as per the tube chart. When I took out all the preamp tubes I noticed V3 reverb send had a 12AU7. After getting the 12AT7 in there I noticed that the reverb was much stronger and where I normally had it on about 4 I had to turn it down to 2. I started reading that many prefer the 12AU7 as it gives more control over the reverb. I don't really notice "more control". Just stronger so you need to turn it down more for the same effect. I usually, mostly have reverb on very subtle, barely noticeable and will only occasionally turn it way up for a particular effect like Steel licks or other reasons for ambience. I like the 12AT7 and the fact their is more reverb on tap. Just wondering what others prefer.