After a brief review of the history of the K2-W vacuum-tube op amp, an LTspice model is used to create its schematic in ...

The casework is sturdy and solid, and the front panel rotary dials are smooth to use. Once we start playing music through it, we like how understated the Mission amp's sound is. Nothing sticks out ...

Musical Fidelity has announced a new flagship phono pre-amplifier – the M8x Vinyl – in the oddest way possible. The press release tells us that it’s built around a fully balanced, dual mono circuit ...

In operational amplifier stability, one rule of thumb is to allow 45 degrees of phase margin. Other design guidelines state that 60 degrees is best; still others say that 30 degrees is sufficient.