In Reply to: The heat of a headphone OTL amp.... posted by wangmr on August 11, 2014 at 06:19:10:
For OTL's this is kinda pivotal. It seems that more headphones are designed with low impedances these days, like 32 ohms or less (yikes!), the easier to suck sound out of a wimpy SmartPhone op amp.
But if you want an OTL headphone amp, you're better off with a headphone with an impedance at least 150 ohms, and 300 ohms would be better. You want those tubes to operate more as a voltage source than a current source.
AnalogDog
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Follow Ups
- What is the impedance of the headphones you plan to use.... - AnalogDog 11:41:15 10/29/14 (0)