Valve audio amplifier technical specification

Technical specifications and detailed information on the valve audio amplifier, including its development history. == Circuitry and performance == === Characteristics of valves === The characteristics of valves as gain devices have direct implications for their use as audio amplifiers, notably that power amplifiers need output transformers (OPTs) to translate a high-output-impedance high-voltage low-current signal into a lower-voltage high-current signal needed to drive modern low-impedance loudspeakers (cf.

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