Sennheiser HD 820 vs Sony IER-Z1R – Detailed Specs Comparison (2026)

Country of Origin: Germany. New reference for closed back headphones. 56mm Ring Radiator dynamic transducer system. Closed, circumaural dynamic stereo, headphones. The new audiophile standard for closed-back headphones. Enjoy audiophile sound quality, whether at home or on the move. Natural hearing experience - realistic sound field with minimal resonance. Ultra-ergonomic adjustable metal headband with inner damping element. Acoustic absorber system prevents frequency masking for unheralded detail. Concave Gorilla Glass reflectors deliver impressive spatial sound reproduction. Luxuriously comfortable microfiber ear and headband padding on key contact points. Developed in Germany and precision-built at Sennheiserâ€™s state-of-the-art Ireland plant Glass covered ear cups make the transducer visible, this special design innovation reflects the sound from the transducer to an absorber to minimize distortion.

Expertly crafted in Japan. In pursuit of perfect sound. For deep bass and fine details. Naturally controlled acoustics. Balanced connection available. A perfectly straight sound path. Faithfully reproduce every note. Originally designed to make you feel. Silk insulator and non-magnetic plating. Silver-coated oxygen-free copper cable. Quality cable for preserving signal purity. Audio grade capacitor without distortion. Sound Space Control for wide sound space. Refined-phase structure for extensive sound. Hear everything with a frequency response to 100 kHz. Refined-phase structure for accurate acoustic blending. HD hybrid driver system ( 2 dynamic 1 Balanced Armature ). 4.4mm balanced, and conventional 3.5mm, connection cables supplied. Optimized for High-Resolution Audio reproduction.Specific uses for product : Music. Product Note : If the size of the earbud tips does not match the size of your ear canals or the headset is not worn properly in your ears, you may not obtain the correct sound qualities or call performance. Change the earbud tips to ones that fit more snugly in your ears.

Sony IER-Z1R and Sennheiser HD 820 offer different noise cancellation capabilities (NA vs Noise Cancelling), which can impact how effectively they block external noise. In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios. If you're comparing Sony IER-Z1R and Sennheiser HD 820, both models offer a strong combination of sound performance, comfort, and modern wireless features. Impedance levels vary (40 Ohms vs 300 Ohms), which can affect compatibility and audio output when used with different devices. The driver size differs between the two (12 mm vs 56 mm), which can influence sound depth, bass response, and overall audio clarity. There is a noticeable difference in weight (26 GM vs 360 GM), which may affect comfort during extended use. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. The frequency response differs (3Hz - 100KHz vs 6Hz - 48KHz), which can influence how well the headphones reproduce lows, mids, and highs. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel.

Verdict: Both headphones offer strong performance, and the right choice depends on your priorities such as battery life, comfort, and noise cancellation.

Top Differences

Noise Cancelling: NA vs Noise Cancelling
Driver Size: 12 mm vs 56 mm
Weight: 26 GM vs 360 GM
Impedance: 40 Ohms Vs 300 Ohms

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Top Differences