HIFIMAN ANANDA NANO vs Sennheiser HD 660S2

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ANANDA NANO compared with HD 660S2

	HIFIMANANANDA NANO	SennheiserHD 660S2
Overview
Released
Released	May 2023	February 2023
Sound
Type
Type	Over-ear	Over-ear
Noise cancelling
Noise cancelling	No	No
Driver size
Driver size	–	38 mm
Back
Back	Open	Open
Impedance
Impedance	14 ohms	300 ohms
Bluetooth codecs
Bluetooth codecs	None (wired)	None (wired)
Drivers
Drivers	Planar magnetic with Stealth Magnets and Nanometer Thickness Diaphragm; 5 Hz – 55 kHz; sensitivity 94 dB	Dynamic, open; 8 – 41,500 Hz; 104 dB SPL (1 kHz, 1 Vrms); THD < 0.04% (1 kHz, 100 dB); lighter voice coil than the HD 660S, with the transducer's resonant frequency lowered from 110 Hz to 70 Hz
Battery
Listening time (maker's claim)
Listening time (maker's claim)	No battery (wired)	No battery (wired)
Design
Weight
Weight	419.6 g	260 g (better)
Headphone cable
Headphone cable	Yes	Yes
Fit and ear tips
Fit and ear tips	Over-ear, open-back; asymmetric oval cups; hybrid headband with weight-spreading strap, metal earcup holders and two adjustment blocks; thicker asymmetric, bevelled ear pads	Over-ear (circumaural), open-back
Works with
Works with	Detachable 3 m cable with 3.5 mm plug and 3.5 mm connectors at each cup; 3.5 mm to 6.35 mm adapter	Detachable 1.8 m cables with a 6.3 mm plug and a balanced 4.4 mm plug; 6.3 mm to 3.5 mm adapter
In the box
In the box	Headphones, 3 m cable (3.5 mm plug), ear pads (fitted), 3.5 mm to 6.35 mm adapter, headphone travel bag	HD 660S2 headphones, 1.8 m cable with 6.3 mm plug, 1.8 m cable with 4.4 mm balanced plug, 6.3 mm to 3.5 mm adapter, carry pouch