One of the most popular articles we have ever run detailed Jeremy Sikora’s experience with his prized Quad 303/33 power amplifier ... s great circuit innovation for the 303 – the ‘triples’ output ...

First teased in prototype form at this year's High End Munich showcase, the reimagined Quad 33 preamp and Quad 303 stereo power amp blend modern-retro design ... With the Quad preamp, Quad has ...

This circuit layout produced low distortion, prompting Quad to promote the 303 as “the world’s first low-distortion transistor amplifier”. At the rear of the Quad 303 power amp are the ...

While we wouldn’t want to document a computer motherboard with ASCII schematics, it’s great for a quick-and-dirty circuit diagrams. Not exactly schematics, but [Duckman] has some Arduino ...

The active devices in these circuits include bipolar junction transistors (BJTs), junction field-effect transistors (JFETs), and metal-oxide semiconductor field-effect transistors (MOSFETs).

The op amp — short for operational amplifier ... The biggest omitted detail in the schematic symbol above is that there’s no power supply here, but you can guess that it is +/- 15V.

can be connected together to form a circuit. A circuit diagram shows how the components ... the total potential difference of the power supply is shared between all of the electrical components.

First of all, there can be some confusion between integrated amplifiers (one that combines both a preamp and power amp) and stereo receivers (which is basically an integrated amplifier with an AM ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Brent Butterworth Brent Butterworth is a writer dedicated to audio gear.

you can install a 15-amp receptacle, but only if you have multiple receptacles on the same circuit, like the common two-plug ("duplex") or four-plug ("quad") setups you have all over your house.