Excité / Technology
Technology

The architecture, in four parts

Every Excité loudspeaker is built on the same architecture: direct measurement of every driver non-linearity that meaningfully contributes to distortion, fed into a real-time, feed-forward correction loop running on FPGA, ahead of per-driver amplification. The architecture is the same in every line; what scales is the driver complement and the cabinet that holds it.

This page is the architecture, broken out into the four areas that make it work: correction, metrology, measurement methodology, and signal path.

01 The thesis

Correction grounded in direct measurement

A loudspeaker's distortion is not random. Every meaningful contribution — motor non-linearity, suspension stiffening at excursion, voice-coil inductance dependence on position and current, surround resonance, thermal modulation of drive strength — is governed by parameters that can, in principle, be measured. What the parameters are doing right now, in this driver, at this signal level, can be known.

Excité's entire architecture is built on that premise. We measure those parameters directly, both during driver characterization and continuously during operation, and we use the measurements to compute a feed-forward correction in real time, per-driver, on FPGA. Nothing in the loop is inferred from terminal signals. Nothing is estimated from a generic model. The correction is built from what we know.

That requires correction architecture, metrology, measurement methodology, and a signal path that all hold together. The four cards below are how we've broken the architecture out for reading.

02 Four areas

One architecture. Four places to look

Each area is its own engineering problem; together they form the loop that runs through every Excité loudspeaker.

01 / Correction architecture Detail forthcoming
Correction architecture
How direct measurement of Bl(x), Kms(x), and Le(x, i) becomes a real-time, feed-forward correction loop on FPGA. What a feed-forward, measurement-led correction looks like under the hood — and why it is fundamentally different from adaptive correction systems that infer their parameters at runtime from terminal signals.
Correction architecture →
02 / Metrology Read now
Metrology — building the measurements
We do not just measure things. We build the measurements themselves — protocols, instrumentation, software, analysis pipelines — purpose-built for the parameters that drive non-linearity in a real driver under real signal. We make measurable things others overlook.
Read the metrology →
03 / Measurement methodology Detail forthcoming
Measurement methodology
The protocols and validation methods that turn raw measurements into correction-grade data. Repeatability, uncertainty quantification, cross-validation across independent methods — how we know what we know, and how the metrology connects to the correction.
Methodology →
04 / Signal path Detail forthcoming
Signal path
From digital input through conversion, linear-phase FIR crossover, correction, and per-driver amplification — the hardware that runs through every Excité loudspeaker. ESS PRO-series conversion, AMD Kria K26 FPGA, Nilai 500 amplification, dual-OCXO precision clock domain on the Reference line.
Signal path →
The architecture
What the parameters are doing right now, in this driver, at this signal level, can be known — and corrected for