Amplificatori audio

Audio Amplifiers are being used for decades. The main function of an audio amplifier is to reproduce the input audio signal at sound producing systems like speakers with desired volume and power levels. The frequency range of audio signals is between 20Hz and 20,000Hz. Hence, the audio amplifier must have good frequency response over the […]

How to upgrade a Quad 405-2 power amp to current standards

BuildAudioAmps

Do it yourself DIY 30 watt stereo amplifier circuit diagram and schematic design using Op amp ICs and other components. diy building of stereo amplfier

The ML-2 is a massive class A mono amplifier. It's output power is often advertised to be 25 watts but it's actually more than that, maybe up to 100W. With its class A design that means it's large, heavy, it runs hot and it's power hungry (even when idle). It'll happily suck 400W from mains (double that if your system is stereo !). The ML-2 was used in the HQD system. Since the HQD is based on Quad ESL-57 panels, the power of the amplifier had to be low but it should be able to drive low…

DIY Class D Audio Amplifier circuit diagram. this is a circuit diagram. It can make 300 watts using 50-0-50 voltage.

More than eleven years after its publication on this website and an ever increasing success, the 3 - 5W Class-A Audio Amplifier has undergone some small modifications (the addition of R1, Q2, R6 and the substitution of Q4 with a Darlington transistor) capable of producing a major improvement.

This is a mono 100-watt transistor amplifier circuit diagram. this circuit diagram can make 100 watts using one pair of transistors

When it comes to sound quality, newest isn't always best. Paul Rigby looks at some of the vintage amplifiers that will bring out the best in your records.