TANCHJIM Ola1DD+1BA Hybrid Wired Earbuds Lightweight IEM 4.4mm Without Mic

DMT 5 Dual-Magnetic-Circuit, Dual-Chamber Dynamic DriverIts large, transparent magnetic-circuit structure strengthens the effective magnetic flux within the voice coils operating area. The dual-magnetic-circuit structure is designed to increase magnetic flux density and improve field uniformity within the magnetic gap, while the dual-chamber structure helps manage the air load on both sides of the diaphragm, thereby increasing magnetic flux utilization and enabling more stable diaphragm control. ^^ PURE Hi Ultra-High-Frequency BA DriverPURE Hi is an independent BA driver designed to extend the ultra-high-frequency range while enhancing overtones and airiness. The main diaphragm can focus more effectively on the lows, mids, and core treble range by reducing the load on the DMT 5 dynamic driver in the extreme treble region.

Working coaxially together, the two drivers create a more complete and coherent sound. ^^ Coaxial Acoustic StructureOLA II places the dynamic driver and BA driver within a coaxial acoustic structure. Different frequency ranges enter the ear canal along a more closely aligned acoustic axis, reducing imaging shifts caused by differences in sound-source position. Imaging becomes more focused, treble is more precise with a higher proportion of direct sound, and vocals and instruments connect more naturally for a more balanced overall presentation. ^^ Smoother Inner Chamber & Helmholtz rear chamberOLA II features a smoother inner acoustic chamber that guides the drivers sound energy into the ear canal more efficiently, reducing unnecessary loss along the way.

OLA II uses a large Helmholtz-style resonance rear chamber. Combining chamber volume, the acoustic pathway, and rear-chamber air compliance gives the vocal range a more stable foundation. ^^ Upgraded External Pressure-Relief Structure, Comfort FitThe vent with a recessed-groove design is positioned to be less likely to be blocked by the ear, helping reduce pressure buildup and improve long-term wearing comfort. The bass also sounds more open and balanced, with pressure released more naturally. The housing of OLA II has been refined from the nozzle angle and shell curvature to the support points and weight balance; every detail has been adjusted for a more secure and comfortable in-ear fit.