Sorry, but that is just wrong.
Here is the real story on why the MSA Sordins rule the roost.
MSA Sordin Supreme performance: the misleading “NRR = 18dB” rating
https://trevoronthetrigger.wordpres...me-performance-the-misleading-nrr18db-rating/
Thats a nice long fancy talk link....BUT bottom line is these msa's do NOT block/lower loud bangs as well as other models, regardless of this fancy frequency talk. The fact that many many who have them feel compelled to double plug them, is an obvious give away!!
I've tried them on myself and compared with other models...and they simply really are lower NRR !! and they're so pricy.. Maybe they're worth more due to quality sound and noise cancellation or other features, but they simply are not so good at what the NRR is about !!
I believe the Pro Ears are the best, from what I've read and they are pricy, but still not the highest priced hearing pro out there... so I say they're fairly priced for the quality. They're 300 and Gold series are 26 NRR, Some Gold are 28NRR and even 30NRR, without plugs !! (the 30NRR are pretty fat).
The youth model are 25NRR w/no plugs (electronic model)
300 series have 3 year warranty and Gold has 5 year warranty (on the electronics) !!
300 series have 5.5 millisecond response time to the compression of the bang and the golds have 1.5 millisecond response time, and they have a high/low volume switch...
Here's just 2 Testimonials from Top IPSC shooters:
TESTIMONIALS:
"I would recommend the Pro Ears to anyone in the shooting sports. The compression technology provides protection while letting me hear my hits on steel as well as the starting beep in noisy environments. I bought my first set in the early 90's and it lasted until 2012 when the electronics finally died."
Cliff M.
"I have been using Pro-Ears for over 20 years. I have owned almost every style they made and can honestly say that exhausted time I try another brand, I always come back to Pro-Ears. They are by far the best all around hearing protection for firearms shooting, protecting the cochlear bone too while providing clear verbal communication with my fellow shooters. If you want the best, trust a guy that shoots over 30k rounds per year of 38 Super Comp. IT'S LOUD. BUY PRO-EARS."
Rob W.