![]() This is an OTL (output transformer-less) tube amp meaning there are no transformers or solid-state components in the audio circuit, the output is solely tube. However, the TA-26 is not such a creation, being a close derivative of the Darkvoice 336SE, both based upon a schematic that is now many decades old. Output impedance can be lowered through the use of an output transformer or hybrid design with tube pre-amp and solid state amp. ![]() However, these very same reasons are also the reason they’ve remained relevant. I do think tube amplifiers are often too quickly discounted based on the high output impedance inherent to the actual vacuum tubes themselves in addition to their high distortion. I am far from the leading authority on this subject, but have dabbled in tube amp design in the past – with little success mind you.
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