Symphonium Audio Helios In-Ear Headphones

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Check out Precogvision’s video review of the Symphonium Audio Helios In-Ear Monitor Headphones below.

Symphonium Audio Helios In-Ear Monitor Headphones

Introducing the Symphonium Audio Helios, a North American exclusive in-ear monitor headphone priced at $1099.

The Helios is a true competitor in sound quality alone in the $1k price bracket and delivers bass unlike any other balanced armature IEM before it. The fit on the Helios is rather large though so for those with smaller ears, they may not be the right fit for you.

Symphonium Audio Helios earphones

From Symphonium Audio

Representing a generational leap for us, Helios was designed to disprove the stereotypes associated with multi-driver balanced armature earphones. Utilizing newly developed technologies, our balanced armature subwoofers produce exceptionally clean sub-bass punch that hits hard, yet does not colour vocal presentation. Tuned for a smooth and detailed midrange, the Helios also features class-leading treble extension that pushes the limits of what balanced armature tweeters are capable of. We combined the best features of different monitors into a single product.

Powered by an integrated 4-Way crossover, the Helios is sure to impress with its dynamism and vigour. We never fail to push the limits.

Symphonium Audio Helios in-ear headphones

Infinite Linearity

Featuring Filtered Linear Attenuation Tuning (FLAT) Technology, a propriety circuit developed in-house with Subtonic, Helios will not be affected by impedence 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.

Custom Cable

A great earphone deserves a cable of equal quality.
As such, each Helios comes with a low impedance hand-built 26 AWG OCC Copper cable from Altalune Audio that has been carefully designed – down to the solder used – to provide the best listening experience possible.


All Symphonium Audio In-Ear Monitors are made of machined AL6061 Aluminium alloy. The T6 Variant of AL6061 is artificially tempered to provide the maximum possible strength and hardness for our In-Ear Monitors.


  • Driver Crossover – Custom Tuned True 4-Way Crossover with FLAT Technology
  • Frequency Response – 12Hz – 24kHz, ± 2 dB
  • Sensitivity – 104dB/Vrms @ 1 kHz
  • Impedance – 8.5 Ohms @ 1 kHz
  • Socket – Spring Loaded 0.78mm 2-Pin
  • Cable – 26 AWG Pure OCC Copper
  • Cable Impedance – 0.20 Ohms (2.5mm), 0.25 Ohms (3.5mm), 0.28 Ohms (4.4mm) @ 1kHz
  • Limited 1 – Year Warranty

Warranty Information:

Symphonium Audio offers a one-year limited warranty on the Universal-Fit models. Symphonium Audio warrants the Universal-Fit models to be free from defects in materials and workmanship on either external shell or internal components for a period of one year from the date of delivery. Symphonium Audio will replace or repair Universal-Fit models that are within warranty.

Cables are guaranteed not to be dead on arrival and have a 3-month limited warranty from the original shipping date.

Warranty does not cover the following:

Physical or hardware damage caused by accident, abuse, misuse, water, ear wax, excessive volume, shock, negligence, misuse of ear gel, acts of God, misapplication or cosmetic normal wear and tear.

Damage caused by improperly or incorrectly performed maintenance or repair by an unauthorized 3rd party or person.

Damage cause by modifications or alterations without the written permission of the company.

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