Which 6sn7 tubes for Rogue Magnum 99

call Mark OBrien at Rogue he told me which tubes were the most important when I owned the 99 but I forget which ones myself...

I think the 2 on the left make more difference, the 2 on the right are mu followers, I think, but check with Mark he is a very easy fellow to talk to...

If you want to try NOS,go for a Sylvania JAN WGTA brown base.I paid $60.00 for a pair about a year ago.They are rising in price every day as all NOS tubes are,so grab some now if you want to try them.The difference in sound is worth the money in my opinion.Good luck.

I agree .. .call Mark at Rogue first. Then, perhaps, call Dennis Had at Cary Audio in NC. He knows a ton about that tube and uses it so often in his gear. He is a "23mA kind of guy" in his own words in that he likes that as the bias current value in his 6SN7's in many cases. It is not just the brand or age or production run or specific design of the tube, but also the current draw it has that also largely impacts the sound. More current draw typically means more rich, full bodied, and warm sound with greater coloration to those aspects or traits. It can be like listening to a tenor sax versus an alto sax. Lower current draw typically means thinner, more incisive, and less coloration. A 6SN7 can be quite coloring and warming on the sound as well as fleshing it out thickly so. Try several of different brands and current values unless you already know your preference for sound types in general as described above.

I'll assume you're interested in NOS tubes (and you should be if you're not!).

I don't know which 2 of the 4 matter most, so when I owned the 99 I swapped sets of 4 that I bought on eBay from reputable sellers.

In the realm of reasonably priced tubes, RCA black plates will tend to add some warmth and Sylvania black plates will add some detail and emphasize higher frequencies.

With one set of speakers I preferred the RCAs, with another the Sylvanias.

The 99 responds well to tube rolling and there are lots of options for 6SN7s. Good luck.

Sylvania's are best IMO. Also I use two of one brand and two of another brand this works really well.