You can't accuse the engineers at Audio Research of talking themselves or their products down – the self-proclaimed "American gods of valve-based audio" have a new flagship power amplifier that ...

No special “warm valve sound”, but it did give me the ... as a headphone amplifier by the vendor. A single-ended tube amplifier has a very high impedance output, which is to say it’s good ...

For the electronics enthusiast a tube audio amplifier makes for an interesting and unusual project, and for that reason it’s one tackled by many. [Keri Szafir] is no exception, and she’s ...