Auribus Acoustics - Sierra Reference True to life accuracy and impact, all day comfort. Enjoy a spacious, detailed sound contrasted by the intense impact of subwoofer-like bass thanks in part to the Patented (Pat. 12,395,780 B2) Linear Extension system. Sierra is a new take on the possibilities of open-back, dynamic driver headphones for audiophiles and studios alike. The 2025 Revision includes an improved headband with a smooth swivel mechanism, along with an optimized driver enclosure for improved mechanical and acoustic consistency. Proudly Hand-Made in California! Pushing Boundaries This headphone has been years in the making, and represents a generational leap in our ability to design and assemble a high quality product in-house. The entire assembly is crafted from advanced polymers and aluminum for a durable, repairable, and lightweight assembly. The new 3D Baffle is a spacious cavity with the driver pointed at an optimal angle towards the ear. In combination with a precision cut acoustic lens, the result is an accurate and expansive soundstage, creating a truly immersive music experience. Specifications 340g Headphones Weight (Without cable) Nylon, Aluminum, and PETG Construction 50mm Paper Cone Dynamic Driver 20 Ohm at 1Khz Includes: Padded Carry Case 1.4 Meter 3.5mm or 4.4mm to dual 3.5mm termination cable Stereo Wired Headphones Dekoni Elite Hybrid Leather/Velour Pads (Installed) 2 Year Limited Warranty