I bought the impulse 25 cal1200 with an extra baffle. A believed the you tubers that it was super quiet.
i Compared it with my ears and a sound meter. The DonnyFl shogun and Ronin were much quieter. Maybe 4 db according to the meter. In all fairness, maybe the impulse needs a few more extra baffles to compete.
I would like to see somebody test them with 3 or 4 extra baffles.