Reminds me of the Christmas ski trip I once made with a friend and his father to North Conway. All night long on Christmas Eve we heard "drip, drip, drip" as the snow melted. Needless to say, conditions weren't great in the morning.
They are not direct drop in subs for the 6922/6DJ8 family as they have different filament voltages. I can't say if they will work in the Mjolnir 2. I'd suggest asking Schiit directly as anything else will be a guess.
Switched from summer to winter bedding (i.e. cotton sheets replaced by flannel sheets). We are having "desert weather". The day starts with morning patchy frosts and warms up to the high 60's to high 70's. Then the temp drops fast when the sun goes down. Two or maybe three weeks ago the nighttime low was in the low 60's. Fall has finally arrived.