Binary Acoustics has launched the Binary 1900, a $235 wired in-ear monitor that combines a dynamic bass driver, a passive radiator, and four balanced armature drivers in each earpiece. It is an unusual configuration at this price, especially because passive radiators remain relatively uncommon in IEMs.

The 1900 made an early appearance at CanJam Singapore 2026, where attendees had a chance to hear the prototype. It is now officially available through HiFiGo, and we expect to receive a review sample soon to find out how the finished version performs.

Binary promotes the 1900 as a “2DD+4BA” hybrid IEM, although that description needs a little unpacking. It does not contain two conventional, electrically powered dynamic drivers.

Instead, each side includes:

• One 10mm dynamic driver for bass
• One 6mm wool-fiber-dome passive radiator
• Two balanced armature drivers for the midrange
• Two balanced armature drivers for the treble
• A three-way crossover with an RC filter network

That means each earpiece has five powered transducers and one passive acoustic element.

The passive radiator does not receive an audio signal directly. It moves in response to the air pressure created by the main dynamic driver, somewhat like the passive radiators found in compact speakers and portable Bluetooth speakers. In theory, this can help add more depth and body to the bass without requiring a second powered woofer.

Of course, adding more drivers does not automatically produce better sound. The real challenge is getting every part to work together without making the bass feel disconnected from the midrange or creating noticeable changes in tone between frequency ranges.

Binary uses a three-way crossover to divide the work. The dynamic driver and passive radiator handle the low end, two balanced armatures cover vocals and instruments, and the final two balanced armatures reproduce the treble.

Binary says it tuned the 1900 for a lively, engaging presentation rather than a strictly neutral or analytical sound. The company describes the bass as punchy and extended, the midrange as clean and natural, and the treble as crisp without losing the earphones’ more energetic character.

Those descriptions are still manufacturer claims, but early show-floor feedback offers some additional context. According to HiFiGo’s CanJam Singapore recap, listeners frequently mentioned the 1900’s clean midrange and balanced overall tuning.

Attendees reportedly described its soundstage as relatively compact and intimate, which is interesting because the retail listing suggests a wider presentation. That difference could come down to personal taste, noisy show conditions, different eartips, or tuning changes made between the prototype and the finished product.

On paper, the 1900 looks aimed at listeners who enjoy noticeable bass energy but do not want vocals pushed too far into the background. Binary suggests it can handle everything from pop and electronic music to rock, jazz, and classical, although we will need more time with the retail version before judging how versatile it really is.

The name comes from The Legend of 1900, the 1998 movie about a pianist who spends his life aboard an ocean liner. Binary has carried that theme into the earphones’ appearance with engraved musical notes, piano imagery, and flowing lines across the faceplates.

The decorative panels are made from 316L stainless steel, while the inner portion of each earpiece uses resin. This combination gives the 1900 a metal-accented appearance without making the entire shell from stainless steel, which could have added more weight.

The resin shells have been shaped for long listening sessions, though comfort will naturally depend on the size and shape of the listener’s ears. Getting a good seal with the included eartips will also be important, especially because poor fit can significantly reduce bass performance.

The Binary 1900 comes with a braided, silver-plated oxygen-free copper cable. It connects to the earphones through standard 0.78mm two-pin sockets, so owners should have plenty of replacement and aftermarket cable options.

You can choose between 3.5mm and 4.4mm terminations. The regular 3.5mm version will work with the broadest range of dongles, portable players, headphone amplifiers, and other sources. The balanced 4.4mm version is intended for equipment with a compatible output.

The package also includes a storage case and several pairs of eartips. Binary has not published some common specifications, such as impedance and sensitivity, so we do not yet know whether the 1900 will be easy to drive directly from a basic USB-C dongle.

The Binary 1900 is available now for $235. Its passive-radiator design certainly gives it a different technical angle from many similarly priced hybrid IEMs, but the tuning and driver integration will matter far more than the component count. We expect to receive a review sample soon and will take a closer look at its sound, comfort, build quality, and real-world performance.