If the Spendors are new give them some break in time. Maybe a hundred hours or so.
New driver tubes may brighten things up. Seimens 6922s come to mind. I admit though, my knowledge and experience with tubes is limited. (you may be able to change to 7308s or some of the newer 6DJ8s, like EI Elites which I remember as being fairly sparkling)
You may be able to obtain a bit of sparkle by a cabling change. Adding a little silver sometimes helps. Depends on what you are currently using of course.
My overall impressions of the Plinius you mention was overall "warmth." Not bad at all, quite pleasent actually, but synergistically speaking, that may not be the best match.
Finally, I wouldnt be too hasty, I really like the V12 and I would not characterize this amp as being too warm. The Spendors however, are on the warm side while triangles are not. My opinion of course.
New driver tubes may brighten things up. Seimens 6922s come to mind. I admit though, my knowledge and experience with tubes is limited. (you may be able to change to 7308s or some of the newer 6DJ8s, like EI Elites which I remember as being fairly sparkling)
You may be able to obtain a bit of sparkle by a cabling change. Adding a little silver sometimes helps. Depends on what you are currently using of course.
My overall impressions of the Plinius you mention was overall "warmth." Not bad at all, quite pleasent actually, but synergistically speaking, that may not be the best match.
Finally, I wouldnt be too hasty, I really like the V12 and I would not characterize this amp as being too warm. The Spendors however, are on the warm side while triangles are not. My opinion of course.