ARC LS-5MKIII or ARC LS-25MKII

Steve- I used Tungsrams in my LS15 for about a year.In a word...detail,detail and more detail. VERY transparent tube with excellent bass. BUT... They are not as sweet and warm in mids and highs. I put Siemens gold pin 7308's recently and feel they offer the better balance without losing detail and transparency. At the price of what the Tungs are going for though, they are worth trying for sure. But I feel they are not in the league with the Siemens.....best..ken

Thanks Ken.

I also use the Seimens 7308 as driver tubes in my amp. They were the richest sounding as compared to Amperex and the telefunkens.

Hi, I had LS-15 before and thought the mid sounds better after infi-cap upgrade, and remember to put in SIEMENS tubes(try bugle boy if you want warm sound LS15). The bass is not as full and musical as LS5. BAT 30SE's bass is not as loud but a good control. AT some point, I have LS-15, LS5, and BAT 30SE at home. LS5 and early LS-15 came out before this power cable thing, so change it to IEC for experimenting power cable would be fun. That's my next plan. One good (yet bad?) thing about 6922 is that there are so many different brands you can try.
BAT you can try different cable even their web site said no difference (to my ears they are less sensitive to power cable than LS15, but I won't say no difference).

John, thanks I will audit 31SE if having chance. LS25-II has a astonishing bass (I hear once in dealer place), and it seems quicker and share some charater with BAT (they all use 6H30 I think, maybe I am wrong). The gear then is so different from mine, so I can't comment too much without living with LS25 for some time.