HEDD HEDDphone Two GT; passive Hi-Fi headphones; open construction; over-ear design (circumaural); based on HEDD HEDDphone Two design; with Air Motion Transformer (AMT) and a multi-layered Kapton polyimide diaphragm with lower distortion; Variable Velocity Transformation technology (VVT); Frequency Range: 10Hz - 40kHz; max. SPL: 88dB @ 1mW; Impedance: 41Ohm; hand-braided and nylon woven SPC cable; adjustable headband (height, width, bend and clamping pressure); including 1x 1.6m cable (6.3mm jack, unbalanced), 1x 1.6m cable (4.4mm jack, balanced), 1x 3-pin audio adapter (6.3mm to 3.5mm jack, unbalanced), 1x 4-pin audio adapter (4.4mm jack to 4-pin XLR, balanced), 1x set of real leather ear pads (pre-installed), 1x set of velor ear pads, 1x travel case, 1x registration card for warranty extension, 1x product history brochure; made of materials such as carbon fiber and magnesium for low weight; Weight: 550g