Electronics for audio, from signal to power.
We design amplification, signal-conditioning and processing circuits, from precision analog stages to Class D power stages, with meticulous attention to noise, efficiency and reliability.
From a fraction of a watt to multi-kilowatt systems
Audio amplification spans a very wide range of applications: from battery-powered mobile devices, where the signal doesn't exceed a fraction of a watt, to multichannel systems with several thousand watts of output.
The analog Class AB amplifier has reached a very high degree of sound quality, but suffers from limited energy efficiency. Class D switching technology is now mature and delivers much higher efficiency — needed in higher-power applications — with sound quality only slightly below the analog alternative.
Passive crossover networks
We design and build custom crossover networks for loudspeakers, tailored to the client's needs.
- Two- or three-way crossover networks
- Audio power up to 1500W
- Linkwitz-Riley and Butterworth topologies
Small signals, utmost precision
Analog processing of very small signals (down to the nanovolt) requires uncommon expertise and sensitivity, which our hardware design team has built over the years. Typical applications include:
- Low-noise signal conditioning and preamplification
- Mixing stages (audio mixers)
- Analog filters and equalizers
- Microphone preamplifiers
- VCAs, compressors and limiters
- Low-noise power supply systems
Some of the projects we've built
100W MOSFET Class AB amplifier for acoustic guitar with a low-noise microphone preamp stage, tone controls, effects (reverb, chorus, flanger) and a Bluetooth receiver.
Audio announcement distribution system with EVAC function full-digital implementation, with integrated audio processing and connectivity for remote management and monitoring.
60W discrete BJT Class AB High-End amplifier complete with thermal, overcurrent, undervoltage and DC-offset protection; industrialised surface-mount module.
Full-featured DSP OEM module, 2 analog inputs + 6 analog outputs + 2 AES/EBU digital inputs with digital output passthrough and an integrated asynchronous sample rate converter (ASRC), providing sample-rate conversion and jitter reduction for digital sources up to 192kHz.
High-power pink/white audio noise generator for environmental measurements with a Bluetooth interface and a configuration app.
Compact multichannel Class D amplifier, 2×30W + 1×50W with line input and A2DP Bluetooth receiver, compatible with Google Chromecast and Amazon Alexa.
Battery-powered clinical acoustic impedance analyzer for acoustic reflex analysis and multifrequency, multicomponent tympanometry.
High-power Class D amplifier, 2×700W / 1×1400W in bridge configuration, with an integrated DSP module and a sinusoidal-input (PFC) switching power supply.
Ultra-Wideband (UWB) audio streaming device with wired-like sound quality and high immunity to interference.
High-voltage ultrasonic transducer driver/receiver with digital modulator, for underwater sonar devices.
Hybrid dual-technology voice jammer (audio jammer) with white noise and multifrequency ultrasound emission.
Raspberry Pi 5 audio HAT for 384ksps sampling of microphone signals in the ultrasonic band up to 100kHz.
DDS-based FM exciter, full digital implementation in FPGA, from digital audio to RF.
Integrating sound level meter (SPL, Leq, A-weighted) with octave and third-octave spectral analysis and MQTT connectivity.
From circuit to product
Analog amplification
Class A, AB, G and H stages, low-noise gain staging and preamplification, engineered for distortion and stability.
Class D amplification
PWM/PDM modulation, high-efficiency switching stages, output filtering and electromagnetic interference management.
Power management
Linear and switching power supplies with PFC, thermal management and protections: overcurrent, overvoltage, over-temperature.
Mixed-signal design
Interfacing between analog and digital domains, ADC/DAC conversion and low-noise signal conditioning.
PCB layout & prototyping
Layout oriented to noise and EMI control, stack-up and routing for power and small-signal paths on the same board.
Compliance & testing
EMC compliance testing and audio measurements: THD+N, SNR, frequency response, efficiency.
How we design hardware
A linear process, from specification to validated prototype, run in close contact with the client. But hardware is only the beginning of the story — the rest is done by digital signal processing.
Firmware & DSP →Requirements & specifications
Definition of the desired audio processing system's functional, electrical, acoustic and mechanical requirements.
Architecture & simulation
Technology choices, detailed circuit design and circuit simulation ahead of layout.
Schematic & PCB layout
Schematic and layout development, with particular attention to noise, EMI and thermal dissipation.
Prototype & validation
Prototype build (fast prototyping) and in-depth lab measurements to validate the expected performance.
Need a custom amplification stage?
Let's discuss your project's functional, electrical and mechanical specifications.