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Feb 26, 2026 | 0 comments

OPT vs. OTL: The Two Defining Philosophies in Hi-Fi Tube ...

Published by IWISTAO In high-fidelity audio, the debate between OPT (Output Transformer) and OTL (Output Transformer-Less) tube amplifiers has existed for decades. Both are vacuum tube amplifiers. Both promise musicality...

Jan 10, 2026 | 0 comments

The Role of 75-Ohm Coaxial Cable in Hi-Fi Audio Systems

Published by IWISTAO In high-fidelity audio systems, signal integrity is just as important as circuit topology, component quality, or power-supply design. Among all interconnect options, 75-ohm coaxial cable holds...