Meze Empyrean Review
MEZE EMPYREAN earlier reputation tor low sensitivity. The Empyrean is tar from being a low-sensitivity example but our measured figure of 109.3dB SPL for 1V at 1kHz, averaged for the two capsules, sets it somewhat below the state-of-the-art in this respect. We recorded 115.2dB from the Audeze EL-8 open-back [HFN Oct ’15] – the best we’ve measured from a planar magnetic thus far. The open-back version of the EL-8 has an impedance of about 31ohm, which is only a tad less than that of the Empyrean (which has a measured impedance range of 32.6-33.2ohm over in impedance is sufficiently small that any variation in frequency response, due to finite source impedance of your headphone amp, will also be negligible.
The uncorrected frequency responses for the two capsules, averaged from ten measurements per channel between each of which the headphone is re-seated on the artificial ear, are entirely typical of isodynamic headphones [Graph 1, below].
This is reflected in the third-octave corrected responses [Graph 2, a bass heavy/treble light perceived tonal balance, although the 1kHz. The ripples in the uncorrected responses between 200Hz and 1.5kHz are matched by small ripples in the impedance versus frequency response, suggesting they may be caused by presence of some resonances below 1.5kHz – an unusual feature
|Sensitivity (SPL at 1kHz tor 1Vrms input)||109.3dB|
|Impedance modulus min/max (20Hz – 20kHz)||33.2ohm @ 157Hz|
|Capsule matching (40Hz-10kHz)||±2.0dB|
|LF extension (~6dB ref. 200Hz)||<20HZ|
|Distortion 100Hz/1kHz (for 90dB SPL)||<0.1% / 0.1%|
|Weight (headset only)||436g|