Dreadnaught a Bit Bright?

I recently acquired a Theta Dreadnaught to drive my Aerials 8b's. Originally I was driving them with a Proceed HPA-2. Sold the HPA-2 with intentions of buying a HPA-3 to drive the front three channels in my HT. To make a long story short, I bought a Dreadnaught based on it's universally high praise. Don't get me wrong I am enjoying the music, but there are recordings that sound bright to me now. Could be my imagination since it's been almost a year (I used the Amp5 temporarily.) since I sold the HPA-2. Thought I'd check to see if anyone else shared this perception or had the chance to go side by side with the two units? Originally, I did side by side comparisons between the Proceed and a Bryson. The Proceed was clearly warmer.