Acoustic Energy AE309² Floorstanding Speaker; pair

The Acoustic Energy AE309² is the evolution of a modern classic, a 2.5-way slim-line floorstanding loudspeaker that brings technology from Acoustic Energy's flagship Corinium into an accessible package. Updated with "Squared" series advancements, this speaker features brand-new drive units developed directly from the research behind AE's flagship CORINIUM project. By replacing the previous generation's ceramic-aluminium cones with advanced paper/coconut-fibre drivers and pairing them with a new soft-dome tweeter, the AE309² delivers a smoother, more organic, and faster performance. Housed in an inert, constrained-layer damped cabinet with luxurious "silk-touch" finishes, it offers a sophisticated visual and sonic presence.

Key Features:

• Coconut-Fibre Drivers: Utilizes brand-new 120mm bass-mid drivers made from a paper and coconut-fiber blend, developed using research derived from the flagship Corinium project.
• New Soft Dome Tweeter: An all-new 29mm fabric dome tweeter with a wide listening sweet spot at higher frequencies, extending to 29kHz.
• RSC™ Cabinet Technology: Constructed from 18mm constrained-layer MDF and bitumen (Resonance Suppression Composite), which significantly reduces cabinet radiation.
• Slot-Port Loaded: A rear slot-shaped port augments the bass output and was carefully developed to reduce the effect of air turbulence, for clean, undistorted bass down to 33Hz.
• Premium Finishes: Available in walnut or the new 'Silk-Touch' Matte Black and Matte White, each with color-matched trims and magnetic-fit grilles.
• Solid Stance: Supplied with solid aluminum feet and spike covers, considerate to any floor surface.

Flagship DNA: The Corinium Effect

The headline upgrade for the AE309² is the trickle-down technology from Acoustic Energy's reference CORINIUM loudspeaker. The new mid-bass drivers employ a unique cone material: a mix of paper and coconut fibre. This natural composite offers an ideal balance of lightness, rigidity, and internal damping. Unlike harder cone materials that can "ring," this new blend ensures that the speaker stops and starts instantly with the music, providing a midrange texture that is open, uncolored, and startlingly realistic.

Inert Cabinet Design

A great driver is useless in a noisy box. The AE309² cabinet uses Acoustic Energy’s signature RSC (Resonance Suppression Composite) technology. By sandwiching a bitumen layer between high-quality MDF panels, the cabinet walls are effectively damped against vibration. This constrained-layer construction forces the energy out through the drivers rather than vibrating the walls, ensuring that the deep bass (reaching a remarkable 33Hz) remains tight and tuneful, never booming or muddy.

Refined Highs and Seamless Crossover

To match the speed of the new bass drivers, the AE309² is equipped with a new 29mm soft fabric dome tweeter. This larger dome moves more air with less effort, resulting in lower distortion and a wider "sweet spot" in your listening room. The 2.5-way crossover network is meticulously tuned to blend this tweeter with the twin bass drivers at 285Hz and 3.8kHz, creating a cohesive wall of sound where individual drivers disappear, leaving only the performance.

Designed for Living

Despite its powerful output (Peak SPL of 112dB), the AE309² maintains a slender, elegant profile. The "Silk-Touch" matte finish is a newly developed, highly durable material, and Acoustic Energy recommends placing the speakers at least six inches from a rear wall and away from corners.

The Listening Room Difference

We’re a third-generation family business with a brick-and-mortar showroom in Chestertown, Maryland, and a reputation built on trust, not hype. Whether you’re visiting in person or ordering online, we bring decades of experience, personalized service, and honest guidance to every interaction. We don’t just ship boxes. We help build systems, answer your questions like real humans, and make sure every detail of your setup is right, from the cables to the final connection. Our passion is helping you get the most out of your gear, with support that lasts well beyond the sale.

Specifications