As an Octave V70SE and Dyn C1 owner I would say the V80 integrated with Super black box would work well but in my opinion not at real high volumes. Octave has the re290 which is designed around the KT120 tubes which would be better. Depending on your budget the mre130 mono blocks would be killer especially if you were to add the black or super black box to either re290 or mre130 amps. The black box just adds capacitance for a lower noise floor - better dynamics and a little more headroom. Something to consider with the mono blocks you have twice as many output tubes which put out a lot of heat. Jubilees would be the best but we are talking $67K for those bad boys. They drove the Consequence Ultimate Editions quite well and a little bit of overkill for the C4's in my opinion.
That all being said Dynaudio also distributes the T + A brand which is also very good match for Dyns although I have never heard them. But looking at all the pictures from the last 2 RMAF shows Dyn has been pairing up Octave with most of the Dyns.
Best of luck in your search and in my personal opinion the C4's are the best speaker I've ever heard - just don't have the room for them or I would own them.
That all being said Dynaudio also distributes the T + A brand which is also very good match for Dyns although I have never heard them. But looking at all the pictures from the last 2 RMAF shows Dyn has been pairing up Octave with most of the Dyns.
Best of luck in your search and in my personal opinion the C4's are the best speaker I've ever heard - just don't have the room for them or I would own them.