TANCHJIM OLA II Coaxial Hybrid In-Ear Monitor Earphones

Building an audio system around a single dynamic driver almost always means a trade-off somewhere in the frequency range. The TANCHJIM OLA II solves this with a coaxial hybrid IEM design that pairs a 10mm DMT 5 dual-magnetic-circuit, dual-chamber dynamic driver with a dedicated PURE Hi ultra-high-frequency balanced armature, aligned on the same acoustic axis. The result is tight bass, natural mids, and extended treble that stay coherent instead of fighting each other for space.

As one of the most talked-about tanchjim iem releases this year, the OLA II measures just 0.03% THD at 1kHz/94dB, roughly a tenth of the distortion of the original OLA, so fine detail and transients come through cleanly rather than getting smeared. With 30Ω impedance and 121dB/Vrms sensitivity, it drives easily straight from a phone, laptop, or dongle DAC, making it just as suited to a daily commute in Dhaka traffic as it is to a quiet evening listening session at home.

Whether it is used for music, gaming, calls, or online meetings, the OLA II is built to be a single earphone that covers most everyday listening needs without demanding extra amplification.

Key Features

• DMT 5 Dual-Magnetic-Circuit Dynamic Driver: A dual-magnetic-circuit structure increases magnetic flux density and diaphragm control, giving punchier, more controlled bass with stable performance even at higher volumes.

• Dual-Chamber Driver Architecture: Manages air load on both sides of the diaphragm for improved transient response, so fast bass notes sound cleaner and less smeared.

• PURE Hi Ultra-High-Frequency BA Driver: A dedicated balanced armature extends the treble range and adds airiness and overtone detail, taking the workload off the dynamic driver for a more balanced full-range sound.

• Coaxial Hybrid Acoustic Structure: Aligning both drivers on the same acoustic axis reduces imaging shifts between frequency ranges, so vocals and instruments stay coherent and well-placed in the soundstage.

• Ultra-Low 0.03% THD: Roughly one-tenth the distortion of the original OLA at 1kHz/94dB, preserving subtle detail and sharper transients for a cleaner listen.

• Optimized Acoustic Chamber: A chamber refined through acoustic simulation guides sound more efficiently to the ear canal, improving clarity on ambience and fine musical detail.

• Ergonomic Shell Design: Shaped using data from more than 3,000 real ear samples, with a vented structure that reduces pressure buildup for comfortable long listening sessions.

• Silver-Plated Copper Litz Cable: A twisted Litz structure reduces conductor interference and high-frequency signal loss for stable, low-noise signal transmission.

• Three Connection Options: Available in 3.5mm single-ended, 4.4mm balanced, or DSP Type-C, so it matches whichever source device is being used.

• DSP Type-C with 8-Band PEQ: The Type-C version works with the TANCHJIM App for an 8-band parametric EQ, official presets, and a sound-preset sharing community, letting the tuning be adjusted to personal taste.

• Goertek MEMS Microphone: Built into the 3.5mm and DSP Type-C versions for clearer voice pickup on calls, meetings, and voice chat.

Why Choose the TANCHJIM OLA II Coaxial Hybrid IEM

The OLA II is built for listeners who want more than a single-driver earphone can usually deliver, without stepping up to a complex multi-BA setup. The coaxial hybrid layout keeps the transition between bass, mids, and treble sounding natural, while the low distortion figures mean more of the original recording comes through intact. Day to day, that translates into an earphone that stays comfortable for long sessions, drives easily from any device, and adapts to different use cases through its three connector options and app-based EQ on the Type-C version.

Technical Specifications