I used a TAD-150 signature and stock DNA 1 for 4-5 years. I found the combination to be a great match, very revealing of upstream changes, new cables, etc. If anything, I'd describe the sound as full and rich, and perhaps not as resolving as other systems that I've heard. I never found that combination at all fatiguing, though.
I agree with the other posters that you may want to focus on other parts of the chain initially to address the brightness that you're hearing.
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I agree with the other posters that you may want to focus on other parts of the chain initially to address the brightness that you're hearing.
e