Beyerdynamic T70/T70p

[jaz]

Just curious Have you tried them with a desktop amplifier?

[brod]

I certainly have.

[vince3141]

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.

From that graph the resistance of the coil appears to be 250Ω but those peaks are resonant peaks - the volume will actually be higher there not lower. As long as your amp has an output impedance < 30Ω (any amp is fine) that will be well dampened.

A soundcard wont play loud enough for some recordings but it can drive that without distortion (again if you don't turn it up too loud)

[brod]

Yes, and I wasn't referring to volume.

Trust me, my sound card is loud enough. I need -26dB 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.

[ledge]

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.

"to their full potential/or to sound their very best", which could be said of most full size headphones ....

a good soundcard is sufficient to drive the DT770s. keep your money and stick with these.

[brod]

Yeah, I'm not going to harp on about sound cards here because I know Headphonic doesn't sell them.

It would be great if we could get back to talking about the T70 (which I still intend to try out)

Here is some non-headroom data:

http://www.innerfidelity.com/images/Bey ... 250Ohm.pdf

[bioxeed]

One thing I didn't see here .. but what exactly are the differences between the T70 and T70p ?? Just the impedance?