Aspire 2 is a Two-Driver IEM with a Bass-Forward Sound Signature, Complimented by Extended Highs Second IEM in the new 64 Audio Aspire Series lineup Crafted with (1x) DD + (1x) BA driver Apex Core provides pressure release for great bass response and long listening sessions Helmholtz Resonator eliminates resonance by targeting frequencies for optimum tuning Corrective circuit eliminates sound variance between a number of sources Check out our measurement of Aspire 2 Aspire Series Aspire Series IEMs empower musicians to monitor their performances with the same sonic excellence and industry-shaping technology used by some of the world's greatest performers. Whether you're just getting into in-ear monitoring, not ready for customs, need a back-up set or simply prefer universal-fit products, Aspire Series UIEMs are designed to accommodate the widest range of ears. In addition to their crowd-pleasing ergonomics and fit, the four models offer distinct variations of sound signatures, within neutral preference bounds, to suit any musician or singer. Aspire 2 Aspire 2's bass-forward sound signature is complemented by extended highs and wide soundstage built into a form-factor that prioritizes ergonomics without sacrificing technical capabilities. All designed and engineered by the innovative team responsible for the industry standard audio gear that 64 Audio is famous for. Two-Driver IEMs A dual-driver system with a two-way crossover system provides increased flexibility in tuning. By leveraging the unique characteristics of both dynamic and balanced armature drivers, Aspire 2 delivers focused low-end impact alongside details mids and highs. Additionally, its integrated Helmholtz Resonator technology helps achieve a forward low-end presentation with an elevated high-frequency response without harshness. Technology apex core64 Audio's patented technology is seamlessly integrated into the body of the earphone. The pressure relieving channel provides controlled venting via acoustic filters. Aspire 2 users get the benefits of 64 Audio's flagship technology with -20dB of isolation combined with ear saving venting. Helmholtz Resonator3D Printed micro-cavities operate by forcing air in and out, causing the air inside to resonate at a specific frequency. By precisely determining the dimensions of the cavity and its neck, we can target a very narrow resonant frequency to amplify or diminish. LIDLinear Impedance Design is a patented circuit that corrects non-linear electrical resistance across multiple driver-sets. Inconsistent impedance across varying devices/sources often results in varying frequency response. Restoring proper interaction with the source enables consistent, reliable sound.