7-10 hours on the TH900, yesterday were on the M-Stage and today were on the WA7 (EH golden Tubes), there is little improvement in the treble and subtle in the bass, yet i am not there, still 1-2 weeks to go
Update: now i am started to feel WoW by the Treble! :3 gave it 6 hours on the WA7 and now back to the M-Stage(opa627) since i cant use the WA7 longer
and the Treble is WoWing me compared to the out of the box, and wow that will keep getting better
the WA7 EH tube will need more burning ofc compared to the M-Stage that is burned already, yet the WA7's mdis are way better than the M-Stage, not the stock tubes ofc, the stock tubes are to give n shape rather than U -.-'' hate it XD