I don't own an ASR and I have no experience with Burson opamps.
What I do have direct experience with is:
- I generally have preferred discrete output stages to opamps. So if I were game for rolling opamps, I would certainly consider what Burson, Dexa and Audio GD call "discrete opamps".
- I have indeed swapped opamps before and it's sort of a YMMV thing. But a number of various opamps are available for $20, $50, $100. And in a hobby where a cotton covered cable costs $1000, and people shell out hundreds for a power cord, I think opamp rolling is one tweak which is quite high value by comparison.
What I do have direct experience with is:
- I generally have preferred discrete output stages to opamps. So if I were game for rolling opamps, I would certainly consider what Burson, Dexa and Audio GD call "discrete opamps".
- I have indeed swapped opamps before and it's sort of a YMMV thing. But a number of various opamps are available for $20, $50, $100. And in a hobby where a cotton covered cable costs $1000, and people shell out hundreds for a power cord, I think opamp rolling is one tweak which is quite high value by comparison.