Headphone brand Écoute has launched a pair of headphones with a vacuum tube and amplification built ... Siri and Google Assistant compatibility, high-bias Class A/B dual mono amplification ...

They feature a small tube called a 'Triode Vacuum Tube', which is small and thus able to fit in the headphone form factor. This acts as a pre-amp for the audio circuitry, coloring the sound of ...

If you are under a certain age, you might not know the initialism VTVM. It stands for vacuum tube voltmeter. At first glance, you might just think that was shorthand for “old voltmeter” but ...