Michael Borresen (Raidho) and Ralph Karsten (Atma-Sphere) both expressed concerned to me about this.
Should listen to Michael and Ralph.
But the addition of the Paul Speltz auto-transformers solved the problem. I am more than delighted with the sonic results
Obviously you're not delighted with the sonic results and trying to solve the thinness by adding cables in a series. You're making a bad situation worse.
I Googled reviews on your speaker and reviewers are using VTL 450 and best results a Rowland 625, 300wpc SS amp.
Well, it's your system so attack however you want.