EXPANSE
headphones
$4,500
Used market: $3,510*
Specifications
3 of 5 values have a recorded sourceExpert Audio Engineering Commentary
Tonal Profile
The open sibling of STEALTH, 418 g. Published at 26 ohms and the same ~90 dB/mW as STEALTH and E3, so on paper the three are indistinguishable to a calculator; what separates them is the acoustics the numbers do not describe.
What the datasheet actually says
Quoted verbatim from the manufacturer’s own page, with the date we checked it. We state what is printed, not what anyone intended by it.
«Impedance | 26ohms | Sensitivity | ~90 dB/mW | Frequency response | Yes, it has one»
The tilde is Dan Clark Audio's own: the sensitivity is published as an approximation, with no measurement point, coupler or tolerance given, and the frequency-response row of the same table carries a joke instead of a number. The identical '~90 dB/mW' appears on E3, EXPANSE and STEALTH, three headphones the same pages describe as having different drivers, different backs and impedances of 27, 26 and 23 ohms.
checked 8/5/2026* Estimated with the depreciation fallback (~78% retained value). · checked on 8/5/2026