Small Room Acoustics in the Zoom Era
by Pat Brown
Entries by Pat Brown
Idealized Models Help Us Understand Real-World Audio and Acoustic Concepts
The theoretical provides a reference for understanding the physical world
Ideal vs. Real
The fields of audio and acoustics are a mystery to much of the general engineering community. The blend of art, science, objective, and subjective makes audio and … Read more
Two Amplifier Channels, One Loudspeaker
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?
Why 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
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
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
Common Amplifier Format: Lab Gruppen E 12:2
by Pat Brown
Pat Brown continues with the Common Amplifier Format (CAF) series. In this article, he overviews the Lab Gruppen E 12:2 amplifier, which is targeted for the installed sound market.
Overview
The Lab Gruppen E 12:2 is
Why Do We Equalize In 1/3-Octave Bands?
by Richard Honeycutt
Richard Honeycutt explains why most equalize in 1/3 Octave Bands. He has included 30 sound clips so readers can evaluate the perceptibility of frequency-response deviations.
A recent forum thread has discussed the question of why we EQ … Read more
What is the Difference Between Delay, Phase Shift, and Polarity?
by Pat Brown
Wavelets are both a theoretical tool and a system tuning tool. Pat Brown explains how to use them to address some common system tuning problems.
In the time domain, we are blind to frequency. In the frequency
Common Amplifier Format: AtlasIED DPA 1202
by Pat Brown
Pat Brown continues with the Common Amplifier Format (CAF) series. In this article, he overviews the AtlasIED DPA 1202 amplifier.
The Common Amplifier Format (CAF) series continues with the examination of an amplifier designed for the commercial … Read more
The Nyquist Plot – Part 1
by Pat Brown
The Nyquist plot is a powerful tool for examining audio filters, both analog and digital. It has been added to the latest version of Filter Hose.
I’ve had many instruments come and go through the years. The … Read more