Aurum's dual electrostatic drivers show up in Space Expansion System (SES™) 2.0. A precisely calculated, computer modelled horn structure placed at the output to act as an acoustic amplifier sees the SPL from notoriously insensitive Sonions boosted naturally by the enclosure.
SES™ 2.0 naturally bypasses any distortion caused by overly taxing the electrostatic units for more volume. Aurum presents Singapore with an electrostatic treble that promises both quantity, and quality.
Excitement about the high frequencies shouldn't distract audiophiles from Aurum's low ones, though. The polyethylene naphthalate (PEN) dynamic driver acts as a subwoofer with impressive presence in the sub-bass region.
PEN is a material ZMF Headphones bring to bear in their flagship Vérité since it "has more dynamic response than a metal". Aurum's single low driver does the work of many balanced armatures and uses PEN's excellent damping to its advantage, rising cleanly up without modal distortion to meet its mid-range drivers in a perfect hand-off that's clean and coherent.
Seven drivers are brought together by a crossover that works as a resistive load, maintaining a flatter impedance throughout the frequency range for a consistent response with more sources, whether mobile phone or high output impedance music player.
It's never about the drivers, but rather Craft Ears' careful optimisation once again to provide the platform for their tools to perform – brought beautifully together in a flagship such as Aurum.
***Listed price covers basic colours. Please consult crew for details.
***Additional fees may apply depending on choice of design.
***CIEM expected lead time is 6 to 8 weeks.
Aurum is a low-impedance IEM that will excel when driven by Questyle Audio's current-mode M12, and is also available in custom (CIEM) form. Otherwise, explore the rest of Zepp's Craft Ears range here or view our other universal (UIEM) options here.