When a system's specifications call for a lowpass filter with a steep frequency-cutoff characteristic, an engineer can opt for a “brick-wall”- filter design that features a sharp transition band. For ...

Class D amplifiers generally use a low-pass filter to attenuate the switching noise in the output waveform while passing the audio signal to the loudspeaker, but many engineers are not familiar with ...

Quad replaces the highly rated 99 Series with an all-new range of components, including a CD player, radio tuner, preamp and two power amps Quad just announced the Elite Series, a new range of audio ...