Meze Audio 99 Classics (2nd Gen) vs Sennheiser HD 505

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

Better figure, where one is clearly better

99 Classics (2nd Gen) compared with HD 505
Meze Audio99 Classics (2nd Gen)SennheiserHD 505
Overview
ReleasedOctober 2025February 2025
Sound
TypeOver-earOver-ear
Noise cancellingNoNo
Driver size40 mm–
BackClosedOpen
Impedance16 ohms120 ohms
Bluetooth codecsNone (wired)None (wired)
Drivers40 mm dynamic; 15 Hz – 25 kHz; 103 dB SPL/mW at 1 kHz; THD < 0.1% at 1 kHzDynamic, 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
Weight290 g237 g (better)
Headphone cableYesYes
Fit and ear tipsOver-ear, closed-back; self-adjusting vegan leather headband on a spring steel frame; detachable vegan leather and memory foam ear pads with a six-point clip-on mount; walnut wood cups and cast zinc hardwareAround the ear (circumaural), open-back; synthetic velour ear pads; synthetic leather headband; metal mesh ear cup covers; lower clamping force
Works withDual 3.5 mm TS inputs (7 mm sockets); 1.8 m dual-twisted, Kevlar-sheathed OFC cable with 3.5 mm jack; 6.3 mm gold-plated adapter; 3.5 mm to USB-C adapter with integrated DAC/ampDetachable 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
ColoursWalnut and goldCopper Edition
In the boxHeadphones, 1.8 m twisted OFC cable with 3.5 mm jack, cable pouch, 3.5 mm to USB-C adapter, hard EVA carrying pouch, acoustic absorbers, 6.3 mm gold-plated adapterHD 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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