But with headphones, especially high impedance headphones like the Senns, OTL designs produce plenty of power. Of course, the limitations of OTL amps are their low power output, and with speakers that’s always a problem because people want to drive big speakers to fill up big rooms. Even with high end output transformers, it’s still an extremely long signal path, and an OTL design is always going to yield a cleaner sound. We all know that the longer the path that the signal has to travel, the greater the degradation (imagine the length of the wire needed to build one transformer). This is why good output transformers are extremely expensive (think thousands of dollars for top grade OTs), because they are extremely crucial to the overall sound quality.ĭespite their limitations, short signal paths and simple designs tend to be very good at things like soundstage and three dimensionality. On amplifier with output transformers (OTs), the transformer at the output end of your amplifier is often likened to having an extremely and excessively long headphone cable to connect your headphone to your amp. Both me and Lieven love output transformer-less amps, often known as OTL amps.
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