Full Sound

PLUSSOUND Prism consists of two USA-made balanced armature drivers (one for high frequency, one for low frequency) that provides a warm low end with extended highs.

3D Technology

Drivers are housed within a thick diameter enclosure that was designed by us and manufactured in-house using medical grade 3D printers. Earphones are made out of durable hypoallergenic acrylic material and hand brushed with special coating to provide scratch resistance and sleek surface.

External Design

Designed to be stylistic, yet ergonomic.

This design allows for the user to wear the cable either behind ear for critical listening or hanging down for other activities. Measuring at just 27x11mm, it offers excellent comfort and fit.

Internal Design

This unique earphone features a single 3D printed horn shaped waveguide for a more open and detailed sound. As well, an added driver and damper shock mount were designed to prevent movements from ever affecting sound quality and performance.

MMCX Connector

Prism features a special MMCX connector developed just for our IEMs. Made from copper based metal in gold plating that offer a significant improvement in tensile strength and substantially reduce signal loss and ensures maximum performance.

UP-OCC Internal Wiring

Drivers and connector are only few millimeters apart and joined together using our highly regarded UP-OCC wiring. The micro signal path provides consistent conductivity and sound quality.

Exo Cable

Included with every earphone is our award-winning
Exo cable featuring a new 28AWG Copper Type 6 Litz wiring. Made exclusively for our IEM lineup, the wire is soft, flexible, and durable. Improvements in clarity and detail are present. MMCX connectors are made from same material as the earphone connector for optimal durability and reliability. You can also select termination from available options that best suits your needs.

Comply Foam Tips

We have partnered with Comply to provide the best fit and comfort when using our earphones. Prism comes with Comfort and Isolation and includes small, medium, and large sizes.

Hand Built in USA

Both the earphone and cable are assembled in-house in Los Angeles, California, USA to provide the best quality and sound experience possible. One year warranty is offered on both.

In the Box

Exo Cable
1x Comply Insolation Tip Set
1x Comply Comfort Tip Set
1x Cleaning Tool
1x Microfiber Cloth
1x Cable Band
2x Amplifier Bands
2x Metal Cases


Dual balanced armatures (High/Low) per side
In-house 3D manufactured enclosure made from durable acrylic material
Sensitive enough for use with portable audio players and amplifiers
Detachable MMCX connection

Exo Series
UP-OCC Copper Type 6 Litz wiring
MMCX connectors
Varied terminations


Drivers: Designed and Made in USA
Enclosure: Designed and Made In-House
Assembled: In-House

Components: Designed In-House
Assembled: In-House

Comply Tips: Designed and Made in USA
Metal Cases: Designed and Made in USA
Packaging: Designed In-House

Product Videos


The Prism is Plussound’s mid-tier earphone, featuring two of their proprietary balanced armature drivers setup in a low/high configuration. It’s a very special sounding earphone that has some really intriguing characteristics that I rarely hear from any earphone at any price. It’s interesting to see how the properties of Plussound’s fabulous cable augment the Prism’s sound without characterising it and it’s great to see that the Prism’s themselves are transparent enough to take advantage of that. It was definitely interesting to listen to an earphone that includes a custom cable from factory as the Prisms sound is greatly influenced by the effects I typically expect when installing such a cable. Most notably, the Prism is super clean and separated with a dark background, easily the most unique aspect of this earphone’s sound.
Ryan Soo, The Headphone List
The Prisms are extremely well built IEMs. They are warm and dark with spectacular layering and separation. The mid-range is relaxed, the treble extension is spectacular, bass is authoritative and punchy. The Prism is a great value at its current price.
Ike Mouser, Head-Fi
Depth and layering for a two-driver monitor are good and even though the Prism is using only one driver for treble and one for bass, the mids aren't really situated in the back. The Prism is fairly linear in that regard and in balanced mode - at least to me - bass, treble, and mids have good body and presence overall, something I really like.
Lieven Vraken, Headfonia
"..Prism is a dual balanced armature iem in Plussound iem lineup. It provides a smooth and warm sound that one can listen to for a long listening session. Furthermore, resolution is great with a high standard of details retrieval. There are many accessories and the iem comes with an upgrade cable. I enjoyed listening to the Prism." - Audio123
Audio123, Head-Fi