SENNHEISER HD 560S OPEN-BACK HIGH-PERFORMANCE HEADPHONES + SONY XB100 PORTABLE WATERPROOF BLUETOOTH SPEAKER (GRAY) Sennheiser HD 560S High-Performance Headphones are reference-grade open-back stereo headphones designed to deliver a natural and transparent audiophile listening experience. The HD 560S combines elements from several classic Sennheiser models to provide neutral sound for critical listening in a comfortable design. 120-ohm polymer blend drivers provide transparent audio reproduction with a frequency response from 6 Hz to 38 kHz, while angled drivers recreate the equilateral triangle listening position commonly used in professional studio environments. The lightweight design with soft velour earpads provides comfort and ventilation during long listening sessions. A detachable 5.9 ft cable with a 1/4" plug connects to professional audio equipment, and a 3.5mm adapter allows compatibility with portable devices. Features include audiophile-grade sound for analytical listening, open-back construction for natural sound wave propagation and wide soundstage, precision-tuned polymer transducers for accuracy and deep bass extension, and a comfortable lightweight design inspired by the HD 660S and HD 599. Included accessories: Sennheiser HD 560S High-Performance Headphones, 5.9 ft cable, and 1/4" to 3.5mm adapter. Sony XB100 Portable Bluetooth Speaker (Gray) provides powerful portable audio with IP67-rated water and dust resistance and UV protective coating. Despite its compact size with a 1.8" full-range driver and passive radiator, the speaker produces a wide soundstage using Sony’s Sound Diffusion Processor. Bluetooth connectivity allows wireless music streaming and the built-in echo-cancelling microphone supports clear hands-free calls. A color-matching buckle strap allows convenient attachment to backpacks or outdoor furniture. This bundle from Teds Electronics includes Sennheiser HD 560S Open-Back High-Performance Headphones and Sony XB100 Portable Waterproof Bluetooth Speaker (Gray). MPN: 509144-2K