Accessories
The wings of sound.
Beyond the speaker
The last10%.
A reference system is built also with what surrounds the speakers: extension of the highest frequencies, control of the deepest register, the heart of the crossover. Every Sigma accessory is born with the same artisanal philosophy as our loudspeakers.
"Every quality added is like removing weight from a racing car."
From the super tweeter to the bass extenders, to the Duelund crossover components: every element is designed to integrate with Sigma systems — from the Ouverture to the MAAT — and push them beyond their limits.
The categories
Four ways tocomplete the sound.
Super Tweeter
The wings of sound
Extends the response upward, adding airiness, depth and timbral realism. Integrates the upper harmonics for a complete three-dimensional soundstage. Developed and refined in 2024–2025, easy to install: from the Ouverture to the MAAT.
Extender Bass · Horn
Acoustic precision
Horn subwoofer with exponential internal geometry (EPH exponential/folded/horn loading): transforms the energy of a powerful 15″ into deep, ultra-fast bass. Extension in the lowest frequencies without booming, immediate transients, natural physical impact.
MAAT · Extender Bass Module
Maximum power
The MAAT EBM brings physical impact and depth to Sigma systems. 15″ long-excursion driver, EPH cabinet with advanced damping to eliminate resonances. Ultra-low extension that enriches the sense of instrument presence.
Crossover · Duelund
Pure signal
The integration of Duelund CAST components represents the pinnacle of fidelity. First-order minimalist crossover: preserves signal integrity by eliminating every barrier between amplifier and speaker, for microdetail and dynamics without coloration.