The Symphonium Helios is a wired in-ear monitor built around balanced armature drivers, with dedicated subwoofers, a four-way crossover and FLAT circuitry that keeps the tuning stable across sources. Its machined aluminum shells house a sound that reviewers describe as hard-hitting sub-bass, a smooth midrange and unusually extended treble for the driver type. It suits listeners who want a technical, bass-capable all-BA set and already own a good source. The main trade-off is size: the shells are large, so smaller ears may struggle with fit.
In stock
Lowest price we've seen: $1,099.00 on Nov 9 at Headphones.com. Tracked across 1 store since Nov 9.
Reviewers rate the Helios as a genuine contender on sound quality, singling out its bass and treble extension for balanced armature drivers. The recurring complaint is the large shell size, which limits fit for smaller ears.
Symphonium Helios Review: Uncompromised Engineering - Written review by FC Construct
Check out Precogvision's video review of the Symphonium Audio Helios In-Ear Monitor Headphones below.
Introducing the Symphonium Audio Helios, a Headphones.com 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.
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.
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.
Durability
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.
Specifications
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.
