We pray our Act of Contrition out loud and so too should the priest pray an audible Absolution.
The purpose of re-forming and conditionally ordaining a Novus ordo priest is for their full understanding and competence in the Traditional Sacraments. To do as the Church does.
If a Novus ordo priest is reluctant to be reformed and conditionally ordained... why should the trad laity trust them?
Their behavior indicates they are not fully committed to Tradition... or worse, they are a modernist infiltrator.
What exactly is the point of the OP and this whole thread?
Is someone alleging that Bp. Huounder or any of the other Novus Ordo Priests that now work in the SSPX are not saying the correct sacramental form in Confession? Or in other sacraments?
Is someone alleging any of them are unwilling to learn it?
I have no desire at all to avail myself of the sacramental ministrations of any Novus Ordo clergy who are not conditionally ordained by one of the SSPX Bishops, but that's because they might not be Priests, not because they deliberately mess with sacramental forms. I have no evidence any of them have ever done that, let alone enough evidence to start a discussion thread about it.
As a Traditional Catholic for the last 20 years, I have gone to Confession to SSPX priests, SSPV Priests, CSPV Priests, Priests from Saint Gertrude's in Ohio, and Priests from Bishop Sanborn's Seminary....EVERY, SINGLE, ONE OF THEM says the form of absolution in a semi-audible voice i.e., somewhere between "whispering" and "muttering", while I say the Act of Contrition.
None of us have any right to tell a Priest he "should" say the form out loud just because we want him to. That's how Traditional Priests do it.
Unless you have evidence, please do something more productive with your life than create threads like this.