I agree that integrating the sub woofer into the system is a bit of a nuisance for the tube amp.
Originally I though the best setup was to
a) Connect the L/R speaker directly to the MC100B.
b) Connect the preouts of receiver to AUX of MC100B ( use bypass switch for HT )
c) Connect analog o/p of Oppo CD/DVD player to CD input of MC100B
d) Then I can select CD for music and AUX for HT
However in this case , no Sub and Audyssey for Music.
To get the best of both , I need to switch the speaker leads at the component end between the Receiver and the MC100 . This should not be difficult using Banana plugs and jacks in a junction box. However one must be careful to have a load on the Tube amp at all times in case someone turns it on when the speaker is connected to the receiver !
I guess I need to play around to see what is best sounding. Its quite unfortunate that the integrated tube amps at the lower end of the price range don't come with a sub out.
Yes there are quite a few integrated tube amps around the $2K range, Primaluna, Mystere, Ming Da, Rogue, Cayin etc All are either EL34 or KT88 based designs.