I am looking at building a ~80W class A amp for experiance and to save costs. I am looking at the AE Aegis One's (nice kit for about $500 here) to couple it with for now but eventually will go up to ...

If you asked [Hans_Daniel] what he learned by building a tube audio amplifier with a dozen tubes that he found, the answer might just be, “don’t wind your own transformers.” We were impressed, though, ...

The purpose of the project is to construct a high end headphone amplifier designed for the highest quality music reproduction with the minimum of distortion. The amplifier is an essential part of any ...

You could argue that the integrated amplifier is arguably the most critical component in modern hi-fi. It combines a power amplifier, a built-in phono preamplifier (which you need to connect a ...

We take a deep dive into the best budget integrated amplifiers currently available from Rega, Yamaha, Cambridge Audio, Audiolab, NAD, and Iota. For this installment of “Best Right Now,” we sat down ...

As more and more electronics gets pulled into large digital chips, you might wonder about the usefulness of a basic amplifier building block. The operational amplifier has existed for some time, ...

Here are two PDF files from the National Semiconductor Web Site that contain good tutorials on the fundamentals of Op Amp circuits and some of the basic analog building blocks that they can provide.