The Prima Luna >>> Zu Audio combination is a very good one. The Zu's are pretty efficient and they are a rock oriented speaker and the PL's 35 to 40 watts should be enough.
Hopefully you are using KT88s or 6550s as your tube set. EL34s will probably not have enough umph for you.
I am thinking that placing an equalizer in the mix would work out best for you, as you could isolate the frequency band you wish to augment.
This one from Schiit looks interesting. Cost is ok, as well. I used a Behringer for years in an old set-up.
https://www.schiit.com/products/loki?gclid=EAIaIQobChMIypLQyN2z5gIVJYFaBR0EwQmTEAYYBiABEgI7uvD_BwE
These days I go as hard as Metallica S&M.
Good luck.
Rich
Hopefully you are using KT88s or 6550s as your tube set. EL34s will probably not have enough umph for you.
I am thinking that placing an equalizer in the mix would work out best for you, as you could isolate the frequency band you wish to augment.
This one from Schiit looks interesting. Cost is ok, as well. I used a Behringer for years in an old set-up.
https://www.schiit.com/products/loki?gclid=EAIaIQobChMIypLQyN2z5gIVJYFaBR0EwQmTEAYYBiABEgI7uvD_BwE
These days I go as hard as Metallica S&M.
Good luck.
Rich