Review on Wireless Marshall Mid Bluetooth Headphones, Black by Stanisaw Augustynowi ᠌

I checked the headphones after > 20 hours of sound, so they are definitely warmed up, although I am sure that warming up is not necessary. I'm not an audiophile, I don't connect headphones with gold wires and I don't expect a warm sound. I naturally listened from different sound cards via cable + from a phone via bluetooth. There is a professional sound card Focusrite Scarlett 2i2, unfortunately the expected sound quality did not "appear" on any sound card. I ordered from amazon, there is no doubt about the authenticity. In fairness, it should be noted that the sound is still better than average headphones like the Sennheiser HD 215 II.