A Speaker Rant?

[MazeFrame]

@Flaculence

AB is using a transformer and caps to push the speaker, class D is doing it by circuitry. so assume class D is a more efficient direct path to driving the speaker ?

For the Solid-State amplifiers, I have written an overview about the classes and working principles:

Amplifier classes

This thread seeks to explain the different amplifier classes in a fashion so you can make a qualified decision about what your application requires. Contents Overview of the amp classes Detailed explanation Bi-Amping, Bridged- & Parallel Amplifier TL;DR Classes overview: Class Construction Advantages Disadvantages Class A Single transistor, full-cycle operation - Very high gain possible - low distortion - low efficency - Requires clean power supply Class B Double transistor pus…

Output transformers could be used in a solid state amp, is uncommon though. In tube amps, you often need an output transformer in order to power low impedance headphones or speakers.

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@joshua_g

that translates to most speakers not typically needing many watts to drive to a reasonable level in a reasonable space for the speaker.

One thing about power I want to look into is how much that changes depending on how “complex” the signal is. In other words: 1kHz sine is power x, but what power is 100Hz, 1kHz and 10kHz playing at the same time?