Open Box Blue Ella Planar Magnetic Headphones — Built-In 250mW Audiophile Amp

Handcrafted planar clarity with onboard power. The Blue Ella combines large, custom double-sided 50mm x 50mm planar drivers and a built-in 250mW audiophile amplifier to deliver both pinpoint accuracy and room-filling dynamics. Each driver uses a self-tensioned planar membrane that is less than 50 microns thick, mounted in oversized enclosures modeled on high-end speaker cabinets for a wide, natural soundstage. Ella units are produced in small batches by skilled artisans. Integrated amp and flexible tonal control. Ella is the first headphone to pack planar magnetic performance together with a 250mW built-in amp, providing exceptional headroom and clarity from phones, laptops or tablets. You can tailor the sound with three all-analog amp modes, including a setting that restores the low-frequency character of vinyl-era recordings. A fit engineered for performance. The closed-back design and sealed enclosure with tuned damping materials improve bass response, isolation and reduce sound bleed. Ella’s multi-jointed headband—inspired by racecar suspension—keeps the earcups parallel and forms a secure seal around the ear for consistent comfort and sonic results. Smart battery and convenience. Ella charges fully in 3-4 hours and delivers approximately 12 hours of playback. Intelligent power management powers the headphones down when idle and they power on/off automatically when opened and closed. Ella will continue to play music even when the internal battery has no charge. Specifications Driver Specs - Type: Planar magnetic driver - Driver size: 50mm x 50mm, custom double-sided - Membrane thickness: < 50 microns (self-tensioned) - Impedance: 50 ohms Passive, 10 ohms Active - Frequency response: 20Hz-20kHz - Enclosure details: Sealed enclosure with tuned damping materials Amplifier Specs - Output power: 250mW - THD+N: < 1% (94 dB SPL, from 20 Hz to 20 kHz) - Frequency response: 20Hz-20kHz - SNR: >101 dB - Noise: < 20 uV - Battery capacity: 1000mAh Headphone Specs - Weight: 481 g (16.97 oz) - Outer dimensions (closed): 21cm x 14cm x 12cm; 8.27” x 5.51” x 4.72” - Outer dimensions (open): 18cm x 29cm x 12cm; 7.09” x 11.42” x 4.72” Included Accessories - Soft carry case - 1.2-meter audio cable with Apple iPhone/iPad controls and microphone - 3 meter audio cable - 3.5mm to 1/4” adaptor