darrenyeats;332882 Wrote: > Aren't we talking about two things here? The power of the headphone amp > stage and the sensitivity of the headphones is one issue. But running > at 90% volume isn't a problem in itself - loud enough is loud enough. > In fact, operating at the top end of the range might be good if you > factor in digital volume / attenuation. > > But what people are worrying about is the current delivery (or not) > into harder or complex loads, which is a matter of load handling or > impedance matching is it not? I'm hardly an EE type but I thought I'd > drop that in... > Darren I think they are connected. The lower impedance headphones are more efficient and take less power to drive them. You can run a higher impedance headphone at 90% and still not get the sound you want. My Westones were bought because I wanted a low impedance efficient headphone to work well with my rockboxed nano. They also work well with the SB3 because of that. Your larger headphones are less efficient and higher impedance and will not work well with it. You need more power, like that of an amp headphone jack to drive them. Most over the ear and even some smaller ones are like that. The impedance is what will tell you that. I really do need someone that is into electronics to explain it but basically low impedance = less power draw high impedance = higher power draw needed. I think anyway. :)
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