For this amplifier the frequency and phase responses ... And it sounds, well, like my hi-fi system. No special “warm valve sound”, but it did give me the momentary cachet of a pair of glass ...

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Read more: 12 Smart Gadgets You Didn't Know Existed Also known as valve amplifiers, tube amps date back to the early 20th ...

Regardless of the design, we have invariably liked what we have heard, and that certainly applies to the range-topping CTA407 integrated stereo amplifier we have on test here. This is currently the ...

Opinions expressed by Forbes Contributors are their own. Technology journalist specializing in audio, computing and Apple Macs. Probably one of the most celebrated amplifiers ever made—the 33/ ...

Taking a straightforward approach, using as little math as possible and lots of design know-how, this practical guide provides design principles and construction techniques so readers can devise and ...

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