Daisiu,
I use the Lamm M2.1 monoblocks and I use NOS Amperex Pinched Waist 6922 tubes, (as does my friend with the Lamm M2.2 monoblocks.) Both of us feel that this is about the best tube for our amps, although they tend to be a bit pricey, (around $3-400 a pair - Ouch! Thank the heavens that they only need one in each amp!). I did experiment a bit before settling on the pinched waist 6922, and I found that the Amperex Orange Globe 6DJ8's were almost as good. (And, these are much more affordable, as they typically run under $100 for a pair.)
One other thing I found that really helped get the most out of my Lamm amps was using Nordost Valhalla speaker cables. (My amps are a touch dark sounding, and these cables really helped to get the absolute best treble response out of them.) My friend also uses these cables, as does a couple of reviewers @ The Audio Beat, (Marc Mickelson and Paul Bolin), who also use Lamm amps, (the M1.2 Ref.), also, (or they did the last time I checked).
Just thought you might be interested.
I use the Lamm M2.1 monoblocks and I use NOS Amperex Pinched Waist 6922 tubes, (as does my friend with the Lamm M2.2 monoblocks.) Both of us feel that this is about the best tube for our amps, although they tend to be a bit pricey, (around $3-400 a pair - Ouch! Thank the heavens that they only need one in each amp!). I did experiment a bit before settling on the pinched waist 6922, and I found that the Amperex Orange Globe 6DJ8's were almost as good. (And, these are much more affordable, as they typically run under $100 for a pair.)
One other thing I found that really helped get the most out of my Lamm amps was using Nordost Valhalla speaker cables. (My amps are a touch dark sounding, and these cables really helped to get the absolute best treble response out of them.) My friend also uses these cables, as does a couple of reviewers @ The Audio Beat, (Marc Mickelson and Paul Bolin), who also use Lamm amps, (the M1.2 Ref.), also, (or they did the last time I checked).
Just thought you might be interested.