Dan Clark Audio E3 vs Sennheiser HD 660S2

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E3 compared with HD 660S2

	Dan Clark AudioE3	SennheiserHD 660S2
Overview
Released
Released	December 2023	February 2023
Sound
Type
Type	Over-ear	Over-ear
Noise cancelling
Noise cancelling	No	No
Driver size
Driver size	–	38 mm
Back
Back	Closed	Open
Impedance
Impedance	27 ohms	300 ohms
Bluetooth codecs
Bluetooth codecs	None (wired)	None (wired)
Drivers
Drivers	5th-generation single-ended v-Planar planar magnetic, 72 × 45 mm (Headfonics); Acoustic Metamaterial Tuning System (AMTS); dual-mode bass port; ~90 dB/mW; distortion < 0.1% ref 80 dB white noise	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	455 g	260 g (better)
Headphone cable
Headphone cable	Yes	Yes
Fit and ear tips
Fit and ear tips	Over-ear, closed-back; protein-leather and vegan suede ear pads (Headfonics); self-adjusting headband suspension; Gorilla Glass 3 clad cups; folding gimbals	Over-ear (circumaural), open-back
Works with
Works with	Detachable VIVO cable, chosen at purchase - 2 m or 3 m with 6.35 mm or XLR plug, or 1.1 m or 2 m with 2.5 mm, 4.4 mm or 3.5 mm plug	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	–	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
Colours
Colours	Black and blue	–