As Axiom’s chief R&D engineer Tom Cumberland describes it, a digital amplifier is a “power DAC”, and of course a DAC (Digital-to-Analog Converter) is the basis of all digitally recorded media, whether ...

The Class D amplifier has some added challenges. Real world transistor switching characteristics require that some degree of dead-time is present in each modulation cycle to control the ...

A tough challenge for test engineers is explored in terms of test methods, pitfalls, and measurement errors. For the test engineer, RF and microwave power amplifier testing imposes unique challenges.

Lock-in amplifiers use phase-sensitive detection to measure the presence of small signals buried in large amounts of noise. By measuring the coherent system response from an incoming AC signal, the ...

Because test setups often are experimental in nature, the amplifier providing the test signal may accidentally drive into an open or short. Of course, if the DUT does not present a good 50-? load, the ...

$3,500 is a lot of money for a hybrid digital power amplifier. The NAD M23 is not your typical hybrid digital power amplifier. Not a chance. I’m must confess to being very ambivalent about “hybrid ...

If you’re looking to build your own iPod or iPhone stereo, AirPlay audio system, or desktop audio system, you could buy self-powered speakers, such as computer speakers or studio monitors. But with a ...