Entries by Pat Brown

Small Room Acoustics in the Zoom Era

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by Pat Brown

Solving the acoustical problems of small spaces requires a different palette of tools than those used in large spaces.

Room resonances can extend well up into the speech range to complicate conferencing, recording, and online meetings creating

… Read more

Zoom Call Issues

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Original-to-Zoom Comparison (fast network)

Note: Listen closely through a stereo playback system. The sound should remain at a fixed location throughout the track. The small timing differences caused by Zoom result in the sound image “wandering” between the left and … Read more

Two Amplifier Channels, One Loudspeaker

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Updated March 2020

The most popular form factor for audio power amplifiers is two-channel or “stereo.”  Pat Brown answers this question, “Why two amplifier channels?”

Photo of a rabbit with a carrotWhy two amplifier channels? It’s most likely due to the popularity of stereo playback systems … Read more

Peaks vs RMS – Keeping Peaks in Their Place

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Peaks vs RMS: This article explains why the modern obsession with “peak performance” represents a step backward in developing meaningful ratings and performance metrics for audio equipment.

I’ve enjoyed watching audio technology advance over the past decades, and I enjoy … Read more

Common Amplifier Format: MiniDSP PWR-ICE125

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by Pat Brown

Overview

The MiniDSP PWR-ICE125 is a 2-channel plate amplifier for active 2-way loudspeakers or subwoofers. Since these articles are tutorial in nature, I’ll use the PWR-ICE125 to present some important fundamentals regarding amplifier ratings and SPL calculations. … Read more