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    Symphonium Audio Helios Earphone

    🚚 Order within the next 2 hours, 15 minutes for delivery by 19 Jun, 2024.
    • TrueX 4-Way Crossover 
    • FLAT Technology 
    • Full Balanced Armature Design
    • Tuned in Collaboration with Subtonic.
    • Anodized AL6061 Aluminium Shell 
    • Azla Sednafit Standard and Sednafit Short Eartips
    • 26AWG Altalune Nova in 4 Wire Configuration
    • Available in 3.5mm and 4.4mm terminations
    • Hand-Crafted in Singapore

    The Technical Reference

    The Helios is a statement class product that represents a generational leap for us.
    Recognized for it's legendary technical ability, the Helios disproves the stereotypes commonly associated with multi-BA driver earphones. The Helios offers an exceptionally clean sub-bass punch that hits hard, without coloring the clarity of vocal presentations.

    Tuned for a smooth and detailed midrange, the Helios also features class-leading treble extension that pushes the limits of balanced armature tweeters. We combined the best features from different monitors into one exceptional product.

    Powered by an integrated TrueX 4-Way crossover and FLAT technology, the Helios is sure to impress with its dynamism and vigour and will deliver an unrivalled audio experience.

    Tuned in Collaboration with Subtonic

    Infinite Linearity

    Featuring Filtered Linear Attenuation Tuning (FLAT) Technology - a proprietary circuit developed in-house with Subtonic.

    Working synergistically with Helios’s TrueX 4-way crossover, the Helios will not be affected by impedance mismatch due to difference in source used. You will be able to listen to the same unimpeded sound regardless of the device you are using.

    Premium Cables

    The Helios comes bundled with premium quality Altalune Audio Nova 26AWG Type 2 Litz OCC copper cables that are designed to deliver an exceptional listening experience with great ergonomics and low impedance.

    Each cable is designed down to the finest details such as solder used and are completely hand built in Singapore.

    Exceptionally Durable

    Crafted from high-grade T6 heat-treated AL6061 Aluminium alloy, the Helios is engineered for durability and long-lasting performance. The T6 heat treatment significantly improves its strength, hardness, and durability while also enhancing its resistance to corrosion and fatigue. This gives the maximum possible strength and hardness for our IEMs, ensuring that the Helios can withstand even the most rigorous use.

    Whether you're performing on stage or listening on the go, the Helios Earphone is built to last

    TrueX™ 4-Way Crossover

    By utilizing a true 4-way crossover, we are able to tune each driver to the exact specifications we require to achieve the best possible sound.


    Each earphone undergoes rigorous channel matching and reference matching with PrecisionMatch technology to guarantee a superior listening experience.

    Quality Eartips

    To squeeze out every last bit of performance, the Helios comes with Azla Sednafit Standards for an uncompromised listening experience.

    • Driver Crossover: TrueX Custom 4-Way Crossover with FLAT Technology
    • Frequency Response: 12Hz - 24kHz, ± 2 dB
    • Sensitivity: 104dB/Vrms @ 1 kHz
    • Impedance: 8.50 Ohms @ 1 kHz
    • Socket: Spring Loaded 0.78mm 2-Pin
    • Cable: 26 AWG Pure OCC Copper Litz Nova
    • Cable Impedance: 0.20 Ohms (2.5mm), 0.25 Ohms (3.5mm), 0.28 Ohms (4.4mm) @ 1kHz