Swiss loudspeaker manufacturer PSI Audio has announced the launch of the A326 D-REX, a low-frequency extension system developed specifically for its flagship A226 MAIN studio monitor. But contrary to what the design might suggest at first glance, the A326 D-REX is not simply a subwoofer – it’s a “Dynamic Range Extender,” engineered to provide enhanced low-end dynamics and transparency, rather than just extended bass.

The A226 MAIN already boasts an impressive low-frequency response down to 20 Hz, making traditional sub-bass supplementation unnecessary. Instead, the A326 D-REX is designed to reinforce and refine this range, giving audio professionals greater clarity, punch, and realism in the crucial 20 Hz to 100 Hz region. With three 10-inch drivers and precise integration, the D-REX doesn’t merely add bass – it redefines it.

“We’re not interested in just making things louder or boomier,”  PSI Audio says. “The A326 D-REX is about resolution, not rumble. It extends the range with surgical accuracy, allowing the A226 MAIN to breathe freely and deliver incredibly lifelike dynamics.”

The D-REX and A226 MAIN are designed to operate in perfect synchrony. According to PSI Audio, the two units are aligned not just in frequency, but also in phase, creating a floor-standing full-range system that functions as one coherent monitor. This tight integration results in a monitoring system capable of delivering up to 126 dB peak SPL – but more importantly, with unmatched fidelity in the low end.

This transparency in the bass range is not just about depth, but about control and nuance. PSI Audio positions the pairing as ideal for mastering suites, high-end post-production rooms, and immersive audio installations where accuracy and detail are non-negotiable.

True to PSI Audio’s long-held philosophy of neutrality and phase-accurate performance, the A326 D-REX benefits from seamless compatibility with the company’s full monitor lineup. Engineers and designers can mix and match across the product line – from the A14-M to the A21-M – without introducing tonal inconsistency.

This approach provides significant flexibility in immersive or multichannel setups. For instance, a studio might deploy A226 MAINs with A326 D-REX units at the front, while employing compact models like the A17-M or A14-M for surrounds or ceiling speakers. Thanks to PSI Audio’s rigorous commitment to linear phase response and neutral voicing, such hybrid systems retain coherent imaging and balanced tone across channels.

As with all PSI Audio products, the A326 D-REX is manufactured entirely in-house at the company’s Yverdon-les-Bains facility. Every unit undergoes individual calibration in an anechoic chamber, with performance data supplied alongside the product. This artisanal attention to detail is a hallmark of the brand’s commitment to uncompromising quality and performance.

“Every component, every circuit is fine-tuned to perform exactly as intended,” the company states. “The result is a system that doesn’t color or compromise the audio – it simply delivers exactly what’s there, with nothing added or lost.”