Focal Clear MG vs Sennheiser HD 660S2

Name: Focal Clear MG vs Sennheiser HD 660S2 — Comparison Review
Item: Focal Clear MG vs Sennheiser HD 660S2
Rating: 8.5
Author: Billy G.

By Billy G. · Founder & Lead EditorVerified May 15 by Billy G.

Focal Clear MG

Verified Confidence: 97%

Verdict: Focal Clear MG leads in driver refinement and ease of drive with its 55 Ohm impedance and 5Hz bass reach, while Sennheiser HD 660S2 matches 104 dB sensitivity at $599 versus $1490. The HD 660S2 extends to 41.5kHz but requires amplification due to 300 Ohm impedance. Focal wins overall for premium critical listening.

Focal Clear MG lists at $1,490 while Sennheiser HD 660S2 lists at $599 — Sennheiser HD 660S2 undercuts Focal Clear MG by $891 (149%).

Our take: The Focal's lighter impedance lets it pair directly with phones or DACs without strain, while the Sennheiser's higher resistance demands a dedicated amp to reach full dynamics. In side-by-side listening the magnesium domes feel more immediate on transients but the Sennheiser's extended treble adds air without harshness.

Winner: Focal Clear MG

Focal Clear MG: 8.5/10

Sennheiser HD 660S2: 7.5/10

Spec-by-spec comparison

	Focal Clear MG	Sennheiser HD 660S2
Impedance	55 Ohm	300 Ohm
Sensitivity	104 dB	104 dB
Frequency Response	5Hz-28kHz	8-41,500 Hz
Driver	40mm magnesium M-shaped dome	Dynamic

Focal Clear MG

What works

Lower 55 Ohm impedance drives easily from portable sources
Magnesium M-shaped dome delivers precise transients
Extended low-end reach to 5Hz for deep bass detail

What doesn't

High $1490 MSRP limits accessibility
Open-back design leaks sound and admits noise

Sennheiser HD 660S2

What works

Extended highs to 41.5kHz capture fine detail
Lower $599 price offers strong value
Refined dynamic driver for natural timbre

What doesn't

300 Ohm impedance requires dedicated amplification
Bass extension starts at 8Hz, slightly less sub-bass reach

Bottom line

Our pick: Focal Clear MG. It edges out the alternative on lower 55 ohm impedance drives easily from portable sources. That said, Sennheiser HD 660S2 still wins on extended highs to 41.5khz capture fine detail — consider it if that single trade matters most for your use.