There’s no way the HD280s are blocking 30db. Here’s a source that says 12db. https://www.rtings.com/headphones/reviews/sennheiser/hd-280-pro#comparison_2088 h

There’s no way the HD280s are blocking 30db. Here’s a source that says 12db. https://www.rtings.com/headphones/reviews/sennheiser/hd-280-pro#comparison_2088 https://www.rtings.com/headphones/reviews/sennheiser/hd-280-...