The very basics of operational amplifiers. Learn comparator, inverting, and non-inverting op-amp configurations. An operational amplifier, or op amp, is a dc-coupled high-gain electronic voltage ...

The DX9 is Chinese audio brand Topping's latest DAC – though it’s also a preamplifier and headphone amp – and it is now available in the UK. Thanks to its combination of proprietary technologies, it ...

A few years ago, QuantAsylum’s QA403 filled a niche between costly high-end analyzers and basic hobbyist setups. In this ...

The humble stereo amplifier has been at the core of any proper hi-fi system for decades, but for most of those it was useless until you added a source or two. These days that’s no longer the case.

If you’re serious about wired audio, there’s now a MagSafe headphone amp and digital-to-analog convertor for iPhone. MagDac ...

This past summer, Fiio introduced the QX3, a new flagship portable DAC and headphone amplifier designed for audiophiles who want to get the most out of their wired headphones while commuting or ...

At $13,000, the Esoteric N-05XE combines streaming, DAC, preamp, and headphone amp duties into a Tokyo-built hub that impressed at AXPONA 2026.

Topping announces the DX9 Discrete DAC and headphone amp Uses delta sigma processing like an integrated DAC, but in discrete components like an R2R DAC Going on sale for £1,299 (about $1,750, AU$2,600 ...

Blackstar has not only crammed a guitar amp into a little box the size of a Bluetooth speaker, but also packed it with ...

Over the last several years, Apple has dramatically improved how it handles lithium-ion battery charging in iPhones, iPads, Macs, and Apple Watches. Across multiple system releases, the company moved ...