Linear Magnetic Drive Twoofer
 Unlike other companies, Soundmatters actually designs its speakers from scratch, and unlike other portable speaker systems, foxL is engineered around a pair of expensive highly sophisticated acoustic drivers, unique in their ability to reproduce both extreme high (tweeter) and low (woofer) frequencies from a single very small diameter (25mm) dome speaker, dubbed the "Twoofer".
Covered by a portfolio of patents, the Twoofer incorporates soundmatter's Linear Magnetic Drive topology featuring field-focused, back-to-back, dual Extreme-Energy™ neodymium magnets and a 1-inch, dual voice coil.
BassBattery / Flatmagic
 FoxL's dual digitally powered Twoofers are assisted in their task of reproducing low frequencies by a miniaturized version of the high mass "moving-wall" passive bass radiators found in soundmatters' award-winning SUBstage home subwoofers.
To add the additional bass driver, without compromising stringent weight and space restrictions, soundmatters engineers developed an innovative solution, the BassBattery™. This patented design was created by rubber-encasing foxL's built-in high capacity, lithium-ion battery, enabling it to provide the mass for, and do double duty as, an acoustic suspension bass driver. Moving the battery from the inside of the speaker to become part of a “moving-wall” radiator, frees up critical internal airspace to drive the bass.
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Skintight Enclosure Architecture: "form follows function"
 There are many valid approaches to designing a good loudspeaker enclosure. Given that our engineering goal is to achieve a maximum level of performance from as small a speaker enclosure as possible, we often find "form follows function" works best for us. This is certainly true with foxL, which was created utilizing high-tech glass-filled composite walls to form a "skintight" ultra-rigid totally sealed acoustic enclosure…often confused with metal, but much lighter, for portability.
Either for aesthetics, or lack of knowhow, traditional small speaker designs often mount their acoustic drivers in manner that actually obstructs their sound, resulting in relatively "boxy or closed in sound" especially if the listener is off-axis from the front of the speakers' direct "line of sight".
 foxL’s Twoofer speakers, are mounted “dome forward” from the enclosure, protected by a grille designed to maximize acoustic transparency. The result being that unlike typical designs, foxL sound open and airy, almost regardless of its location.
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