coupled impedances

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• Output transformerless — (OTL) is a term which describes a subset of vacuum tube audio power amplifier topologies, all of which omit an output transformer for the purpose of greater linearity and fidelity. Conventional vacuum tube amplifier designs rely upon an output… …   Wikipedia

• Output TransformerLess — (audio amplifier) = In the larger scope of vacuum tube audio amplifiers Output TransformerLess (OTL) describes a specific subset of audio power amplifier topologies, all of which have a single common attribute: unlike conventional vacuum tube… …   Wikipedia