Amplifiers

HEADPHONE AMPLIFIER
On much audio equipment, the headphone output is simplyderived from the loudspeaker output via a series resistor:not a very elegant design! The present circuit describes a‘real’ headphone amplifier that can be added to mostequipment, but may also be used as a stand-alone unit.

This realization prompted the presentcompact power amplifier whose quality and layout match those of thepreamplifier. It offers medium power output, is not overly complex andhas a very high slew rate.

power supply and construction
Following the detailed description of the preamplifierin last month’s instalment, this secondand final part of the article deals with the powersupply and the construction of the completeunit. More so than usual, the power supplyforms an important part of the overall design. Itconsists of 12 NiMH batteries, size AA(RG/HP7) with a nominal capacity […]

This preamplifier is intended for those audio enthusiasts who are interested in only the best. Its discrete design produces distortion figures that are measured in tenthousandths of a per cent (the remainder of its specification looks very good, too!). Moreover, bearing in mind that in certain areas the mains supply voltage is not as pure […]