Started my journey 11 years ago with the Sennheiser CX-300-II Precisions... : r/headphones
Sennheiser CX 300 II Kopfhörer Test | Kopfhörer Test 2023
Sennheiser CX 300-II Precision In-Ear only Headphones - White for sale online | eBay
Original Sennheiser Cx300-ii Precision In-ear Only Headphones Deep Bass Earphones 3.5mm Wired Stereo Music Headset Sport Earbuds - Earphones & Headphones - AliExpress