Sep 19, 2026
How Much Amplifier Power Do You Really Need?
A practical guide to speaker sensitivity, listening distance, headroom, power ratings, and why amplifier watts are not a simple speaker-matching formula.
Maroon Audio Journal / Audio Systems & Technology
Audio Systems & Technology
Practical guidance on speaker and amplifier matching, alongside Maroon Audio products and the technologies behind them.
Latest audio systems and technology articles
English editions
Sep 17, 2026
How Modern Class D Amplifiers Have Improved
How modern Class D amplifiers use feedback and error control, and why power, distortion, noise, and loudspeaker loads need their test conditions.
Sep 17, 2026
Class D Does Not Mean Digital: Analog Inputs and Preamp Matching
Why Class D does not mean digital audio input. Understand Maroon analog-input power amplifiers, gain, volume control, and preamp or AV processor matching.
Sep 17, 2026
Understanding Hypex: From UcD to NCORE and NCOREx
Explore Hypex UcD, NCORE, and NCOREx, including self-oscillation, post-filter feedback, input buffers, and the role of complete-amplifier design.
Sep 17, 2026
Understanding Purifi: Why Eigentakt Focuses on Error Control
Understand Purifi Eigentakt, output-inductor distortion, feedback, second-generation modules, and the distinction between module and amplifier specifications.
Sep 17, 2026
Bruno Putzeys: Bringing Class D to the Heart of High-End Audio
From an old tube amplifier to UcD, NCORE, and Purifi Eigentakt: the ideas, turning points, and engineering approach behind Bruno Putzeys’ career.