Author: Robert Vardy

If you are looking for the best 6550 tube, these four models are a useful place to start. Sovtek, Tung-Sol, Electro-Harmonix and JJ take different approaches to...

Can’t find the best KT88 tube for your amplifier? These three options offer different combinations of internal construction, finish and set selection. The Genal...

The best KT77 tubes are the ones that suit your amplifier’s output stage and the way you use it. The Genalex Gold Lion and JJ Electronic models below offer two ...

Looking for the best tube for Vali 2? These four 6922/E88CC options suit the original Schiit Vali 2’s replaceable-tube design, from a straightforward standard-p...

Looking for the best 6922 tube for your hi-fi amplifier or preamp? These seven models compare conventional and gold-pin designs, documented electrical requireme...

If you are looking for the best 5Y3 rectifier tube, these three models offer a useful comparison of construction, power-supply behavior and practical fit. A 5Y3...

Looking for the best 6L6 tubes for your amplifier? These five models cover conventional 6L6GC replacements and the related Sovtek 5881WXT design. Their differen...

Are you looking for the best 12AT7 tube for your amplifier or hi-fi system? These four models offer different approaches to reverb, driver and phase-inverter du...

Looking for the best 12AU7 tube for your amplifier or preamp? These six models include straightforward replacements and gold-pin hi-fi alternatives. The useful ...

Looking for the best sounding 6SN7 tube for your amplifier or preamp? These six options range from conventional straight-sided replacements to larger hi-fi desi...