6sn7 or 6sl7


I have an Almarro A318-B and would like to swap out one of the preamp tubes, but I cannot decide which one would have the greatest affect on the sound. The Almarro uses a 6sl7 as the input tube and the 6sn7 as an "anode follower" (I'm not sure what that is?). I can only afford to do one now, so hence my dilemma. I have three different 6sn7's at the moment with the following characteristics: RCA 6SN7-GTB that has a detailed but lush presentation; Electro-Harmonix that has a very detailed and airy sound, but is a little flat and edgy, and last is the stock Russian 6H8C that images very well but has limited frequency extension. I have only used the stock Russian 6sl7 (6H9C) with all of these because that is the only one I have. 

Any insight would be much appreciated. 

Thanks!! 
enobenetto

Showing 1 response by enobenetto

Thanks both of you for the responses. I will look into the Tung-Sols. The Mullard seems to be harder to come by unless I buy a new reissue but those have mixed reviews. I think this will be an interesting tube match. I might even get two different 6sl7 to mix and match with the other 6sn7. This is fairly new to me, but it is interesting. I guess it is not too cost prohibitive because you only get one choice of power tubes with the Almarro and they are cheap.