AüR Audio has once again pushed the boundaries of audio technology with our latest offering, Astra. This world-first innovative pair of IEMs boasts a cutting-edge nine-driver Quadbrid configuration on each side, representing a significant leap forward in the industry.
 
The sophisticated driver arrangement comprises 2 x 7.5mm dynamic drivers for deep, punchy bass response; dual balanced armature units for detailed mids and highs; one 12mm piezoelectric frequency-shifting bone conductor; and 4 miniature planar magnetic drivers to deliver exceptional clarity and accurate sound. This carefully selected combination of drivers is expertly tuned, resulting in a clean, crisp, and highly refined sound reproduction that audiophiles are sure to appreciate.
 
Astra introduces a revolutionary implementation of four brand-new miniature planar magnetic treble drivers on each side. This design choice elevates performance beyond traditional balanced armatures. The result is a superior listening experience characterized by lower distortion, a wealth of nuanced detail, and a remarkably smooth treble response. 
 
The frequency-shifting piezoelectric bone conduction driver represents a significant advancement in audio technology, meticulously engineered to deliver sound within the optimal hearing range of human ears. The driver achieves increased stability and a more comfortable vibration sensation for the user, setting a new standard for bone conduction audio experiences.

Configuration information of :
 
• 2DD: Dual Opposed 7.5mm pu+peek DD with N52 magnet
• One Sided 12mm Full range Piezoelectric Bone Conductor
• 2BA: Customized Mid High Dual BA
• 4 Miniature Treble Planar Drivers
 
GENERAL SPECIFICATIONS
 
Frequency Response: 20 Hz - 35 kHz
Impedance: 10Ω at 1 kHz
Sensitivity: 106dB (@130mV)
Total Harmonic Distortion: <1% (@130mV)
 
HOUSING MATERIAL : 3D Printed Resin
 
In the Box
AüR Audio Astra IEMs
IEM Cable
PVC Carry case
Ear tips (x3) pairs (S, M, L)