Consumer devices with closely spaced speakers produce a narrow, flat sound stage. The physical distance between left and right drivers — often just centimeters on a phone or laptop, and not much better on a slim TV — limits the spatial impression that stereo content can deliver. Ambience collapses, depth disappears, and the listening experience feels confined to the device rather than the room.

PRISM SoundSpace creates a full frontal sound stage from a standard 2-channel stereo signal. It adds psychoacoustic width, height, and depth that extend well beyond the physical speaker positions — typically doubling the perceived width — while preserving the directionality and musicality of the source material. This is not a surround process. It constructs a natural, front-facing spatial image with correct proportional placement of vocals and instruments.

How it works

PRISM SoundSpace combines two processing stages: a spatial rendering engine and PRISM equalization.

The spatial rendering uses Eilex's proprietary Spherical Head Model (SHM) to calculate how sound propagates around the human head. Unlike Head-Related Transfer Functions (HRTFs), which are measured from a specific dummy head and apply accurately only to listeners whose head geometry matches that model, SHM uses a generalized spherical approximation that delivers consistent spatial accuracy across listeners with different head shapes and sizes. A crosstalk cancellation (XTC) process works alongside SHM, canceling the sound arriving at each ear from the opposite-side speaker. This sharpens spatial precision and allows the rendered sound stage to extend convincingly outside the physical speaker positions.

The PRISM equalization stage corrects the speaker system's Acoustic Power Volume Density (APVD) frequency response, establishing a tonally accurate baseline before the spatial processing is applied. Without this correction, frequency-dependent coloring from the speakers would distort the spatial rendering.

Stereo widens, dialog stays centered

The most critical behavior in any spatial process is what happens to dialog. PRISM SoundSpace selectively widens stereo content — ambience, reverberation, sound effects, instrument placement — while leaving mono and center-channel content exactly where it belongs. News anchors, film dialog, and solo vocals remain firmly centered. The spatial expansion applies only to the elements that benefit from it.

This makes the process compatible with all program types without switching sound modes. News, drama, film, music, and sports are all handled correctly — there is no need for the user or the system to select a processing mode per content type.

Image elevation

When speakers are mounted below the screen — standard in most TV designs — PRISM SoundSpace elevates the perceived sound origin to picture level. Dialog appears to come from the on-screen speaker rather than the TV stand or base, matching the visual expectation.

Not virtual surround

PRISM SoundSpace works from a standard 2-channel stereo input. Unlike virtual surround processes, which require a digitally connected 5.1-channel signal to operate, SoundSpace enhances any stereo source — broadcast, streaming, music, or gaming — without special input requirements.

Where PRISM SoundSpace fits

PRISM SoundSpace is designed for any product where physical speaker placement limits the spatial listening experience. TVs, laptops, PC monitors, mobile phones, and Bluetooth speakers all benefit from expanded staging. The process is linear — it preserves the original recording's directionality and tonal character — and integrates directly with the PRISM equalization pipeline.