Audio-Technica ATH-R50x vs Sennheiser HD 505

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

ATH-R50x compared with HD 505
Audio-TechnicaATH-R50xSennheiserHD 505
Overview
ReleasedJanuary 2025February 2025
Sound
TypeOver-earOver-ear
Noise cancellingNoNo
Driver size45 mm–
BackOpenOpen
Impedance50 ohms120 ohms
Bluetooth codecsNone (wired)None (wired)
DriversDynamic, 45 mm; fully open-back with no added acoustic tuning; 5 – 40,000 Hz; 93.3 dB/mW; maximum input power 1,600 mWDynamic, open-back; custom 120-ohm transducers made in Tullamore, Ireland, angled forward in the ear cups; 12 Hz – 38.5 kHz; 107.9 dB SPL (1 kHz, 1 Vrms); THD < 0.2% (1 kHz, 90 dB SPL)
Battery
Listening time (maker's claim)No battery (wired)No battery (wired)
Design
Weight207 g (better)237 g
Headphone cableYesYes
Fit and ear tipsCircumaural, open-back; new headband design; replaceable ear pads and head padAround the ear (circumaural), open-back; synthetic velour ear pads; synthetic leather headband; metal mesh ear cup covers; lower clamping force
Works withTwo detachable cables, 3.0 m and 1.2 m, each with a 2.5 mm twist-lock connector at the left earcup and a gold-plated 3.5 mm plug; 6.3 mm adapterDetachable 1.8 m cable with 3.5 mm plug on the left side; 3.5 to 6.35 mm screw-on adapter; compatible with HD 500-series cables, including balanced and microphone cables
ColoursBlackCopper Edition
In the boxATH-R50x headphones, 3.0 m and 1.2 m cables, 6.3 mm adapter, pouchHD 505 Copper Edition open-back headphones, 1.80 m cable with 3.5 mm plug, 3.5 to 6.35 mm screw-on jack adapter, drawstring bag

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