A glance at any outlet through which Chinese modules can be bought will find this type of tube in small audio amplifier projects ... No special “warm valve sound”, but it did give me the ...

The 100-watt tube amplifier – visual shorthand for ... with an eye-catching strapline – “the lightest 50-watt valve guitar amps on Earth”. Key to this was using switched-mode power units ...

There’s a mystique in audiophile circles about tube amplifiers. They can have a very nice sound which is attributed to their even-harmonic distortion, but they are often portrayed as requiring ...