Posts

The Amplifier-to-Loudspeaker Interface

By Pat Brown

Amplifier-to-loudspeaker Interface – is there anything special about hooking an amplifier to a loudspeaker? Here is a brief look at some parameters that can affect the sonic performance of this important interface.

The Ideal Case

Most analog … Read more

Measuring RMS Voltage: Many Meters Will Do

By Pat Brown

Pat Brown measures RMS Voltage using 5 difference meters and shares the results.

The Vrmsmax loudspeaker power test requires real-time measurement of the Root-Mean-Square (RMS) voltage of the noise stimulus. RMS measurements have been the subject … Read more

Impedance Measurement

By Charlie Hughes

Impedance Measurement – Here are some methods and caveats in characterizing the load seen by the amplifier.

To determine the input impedance of a device both the voltage across the device and the current flowing into the … Read more

Loudspeaker Power Ratings – Why all the Fuss About Power?

By Pat Brown

Loudspeaker power ratings is a confusing topic in the audio industry. In this article, Pat brings some clarity.

It is generally accepted that a large loudspeaker power rating is a sign of quality and something to be … Read more

Using Limiters to Help Protect Loudspeakers

By Charlie Hughes

In this article, Charlie Hughes will help you understand how limiters can be used to provide protection from over excursion.

Using limiters to protect loudspeakers is nothing new. In many applications a limiter is placed immediately in … Read more

Piezo Magic – Accurate Gain Structure Using a Common Device

By Pat Brown

Pat Brown will show you a way to set gain structure by using a piezo tweeter.

In order to set the gain structure of a signal processing chain properly, it is necessary to determine when each device … Read more

Meaningful Metering for an Audio Waveform

By Pat Brown

There are at least three significant parameters that can be monitored for audio waveform – Peak, RMS and average. Pat explains each of them.

It is beneficial for the sound system operator to have some visual feedback … Read more

Why Use a "70.7 Volt" System?

By Pat Brown

Pat Brown answers this question, Why Use a “70.7 Volt” System?  He also clears up some common misconceptions about 70.7V distribution systems.

That’s a good question, and one that causes a lot of confusion among audio practitioners. … Read more

Axial Sensitivity – Sense and Sensitivity

By Jeremy Johnston

One of the many specifications included in loudspeaker specification sheets is the Axial Sensitivity of the loudspeaker. This article clears up some confusion on this topic.

One of the many specifications included in loudspeaker specification sheets is … Read more

Which Impedance? Nominal Minimum / Maximum Average

By Pat Brown

This article addresses three dominant reasons for measuring the impedance of a loudspeaker.

The impedance of a loudspeaker characterizes the opposition that it presents to current flowing from the amplifier. The impedance is both complex and frequency-dependent. … Read more