PS - Based on the STereophile measurements here:
https://www.stereophile.com/content/hales-revelation-three-loudspeaker-measurements
That speaker is already very difficult to drive. Even small variations can perturb it further. Also, because it’s such a difficult speaker, I would have done a complete analysis first, to see if there are opportunities to improve the impedance curve while maintaining the frequency response. Old Gensis / Infinity speakers notoriously benefit from this type of work.
https://www.stereophile.com/content/hales-revelation-three-loudspeaker-measurements
That speaker is already very difficult to drive. Even small variations can perturb it further. Also, because it’s such a difficult speaker, I would have done a complete analysis first, to see if there are opportunities to improve the impedance curve while maintaining the frequency response. Old Gensis / Infinity speakers notoriously benefit from this type of work.