In this episode of Elektor Engineering Insights, Brian Tristam Williams speaks with Elektor contributor Roberto Armani about evaluating audio amplifier performance using real lab techniques.
They cover fast square-wave testing, Bode plot analysis with modern digital oscilloscopes, tone-control issues, rise time, bandwidth, and why instrumentation often tells a different story than subjective listening. The discussion includes live scope demonstrations, vintage and modern test equipment, and practical advice drawn from decades of hands-on servicing experience.
Topics covered include:
– Square-wave testing for quick amplifier diagnosis
– Bode plots and frequency-response measurement
– Tone control, loudness circuits, and real-world faults
– Rise time, bandwidth, and what actually matters audibly
– Analog vs digital measurement tools in modern labs
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