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Background and Identification
Sennheiser is a German company focused almost entirely on audio equipment, so it's no wonder they have an assortment of headphone options in their product line. They produce several iterations of open-back headsets, in-ear wireless earbuds, bluetooth over-ear sets, and have many wired offerings as well.
Sennheiser headphones can be identified by their rectangular "S" logo printed on the earcups or headbands of most of their offerings. "Sennheiser" may also be printed along the headband.