groovyd
Headphoneus Supremus
- Joined
- Jun 29, 2012
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The headphones won't draw more current than they need for a given voltage, given their impedance at the composite frequency at any given moment, that's true.
The voltage is a "push" thing; the amp has a specific potential difference at a given attenuation setting for a given input signal level (based on it's gain). That "drives" the headphone. But that voltage, combined with the impedance of the headphone dictates the amount of current the headphones will draw (a "pull" thing). If the amp can supply it, it's all good - if not, you get clipping (and potential damage to the transducer if you push it too far).
An amp with more power available than is required will simply not run into clipping even with protracted periods of high-output that demands lots of current. A less powerful amplifier might be up against the wall in terms of ability to service the current demand, and will have less dynamic headroom, so those big power excursions won't be tolerated as well.
I gave the LCD-4 a run with my Lyr this morning. I didn't feel they were hurting for power. Imagine the Mjolnir 2 will do an even better job and probably has more reserve power capacity (beyond simply being rated higher) anyway.
Hope that helps!
here's the thing... amps have output impedance as well as the headphones having their impedance. with current flow this output impedance drops the output voltage of the amp in direct proportion to the current being delivered. can the amp recover that voltage drop via feedback? how quickly can it recover?