I recall with the Burson 6 Vivid that the Bass was varied during the Burn In, only becoming consistent after about the 100 Burn in Recommendation.
I.as also informed there is another Burson Model that has a little more Bloom, but this is not my
go to SQ.
A friend who modified the DIGNA to receive other Valves was keen to try Op Amp Rolling,
once the Tube Selection was discovered during the Tube Rolling experience.
My experience is that the DIGNA does not do Bass Bloom, it is taut and decays with an honesty, that feels correct to myself.
I.once discussed on behalf of Jurgen a concern raised by a UK customer.
The Customer was a 1960's Valve Circuit Enthusiast, and only wanted overbearing bass.
This was not available from the DIGNA and the Customer was of the opinion all designs should have such an overbearing presence.
Additionally the DIGNA to my ears is a little lean in the Mid's and Highs and Transparent.
This only become apparent during periods when the DIGNA was entered into Bake Offs,
and certain costlier Phonostages were capable of showing a difference in the presentation.
I have discovered a rarely available tube, that allows a little extra weight throughout the frequency range, but these are very rare as matched pairs, and the asking price for the early production models is quite high.
Valve Nirvana is a risky business, patience and Caveat Emptor is the requirement for the buyer.
I have heard the DIGNA bettered by other Phono's, that have been compared in a non owned system, but to move on to a position where the differences are to be found without questions, does come at a 'much increased cost'.