brod wrote:dingostolemyipod wrote:Amps provide equal amounts of gain across all frequencies regardless of load impedance(if their output impedance is sufficiently low), frequencies with impedance peaks don't need extra amping.
To sound loud, no. To sound good though? An impedance peak would reduce the amount of current available to move the drivers, so if you're providing headphones with just enough current to drive them well at 250~300Ω but bass spikes to 600Ω then bass is going to sound terrible in comparison.
This just so happens to match many of the subjective opinions of the T70 posted online thus far.
It's not the easiest thing to provide headphones with a lot of current at sensible listening volumes (I prefer ~70dB), especially when said headphones have very high sensitivity.
brod wrote:Yes, and I wasn't referring to volume.
Trust me, my sound card is loud enough. I need -38dB of ReplayGain just to get down to my preferred listening SPL.
The headphonic product page for the DT770 states that "Amplification is required to drive these headphones". That may have been true when it was written (2005?) but it's certainly not true now. High end sound cards have improved considerably in the last few years.
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