The circuit was designed to create a line preamplifier by acquiring the use of double triode tubes. The circuit comprises of three parts, the main preamplifier circuit with tubes, the input selector ...

The circuit was based on a single operational amplifier integrated circuit that is made to produce a modular preamplifier which functions in the Class A operation Preamplifier (pre-amp) – a device ...

At $50K, the Momentum C4 preamplifier gets a new remote and works seamlessly with optional digital streaming module for another $10K. Did Krell high-end audio components ever look this good? Dan ...

When most people think of tube circuits, the first thing that comes to mind is often the use of high-voltage power supplies. It wasn’t a given for tube circuits, though, as a range of low-voltage ...