Quote:
Originally Posted by

**rudeboybass**
i have the rockwool mod and srh840 pads and through the schiit magni i can go 75% volume before it blasts my ears out..

you mean W not MW? idk if .29mW would be enough power to run the t50..

29 Watts?!? That would be utterly insane if they required that much power to reach 90 dB SPL. I don't even think Schiit Audio amps output that much power. Are you sure your source volume is maxed out? (i.e. source at maximum volume level, then adjust the volume with the Magni's potentiometer).

Here's something for comparison, the infamous power hungry HE-6: 19.69 mW to reach 90 dB SPL

And a little math if you're so inclined:

You double the power needed for a +3 dB SPL gain. One perceives twice the volume level with a +10 dB SPL gain.

16.69 mW to reach 90 dB SPL

33.38 mW to reach 93 dB SPL

66.76 mW to reach 96 dB SPL

... or 16.69 * 2^x to reach 90 + x*3 SPL

Usually 110 dB SPL is a good indication for a very loud listening level, or for very dynamic music.

110 dB SPL - 90 dB SPL = 20 dB SPL

20 dB SPL / 3 dB SPL = 6.666666666666666666666666

16.69 mW * 2^6.6666666666 ≈ 1695.59 mW or 1.69 W

Yes, about 1.7 Watts of power is needed to get an infamously inefficient HE-6 to ~110 dB SPL.

Here's the M-100 for comparison's sake.

0.03 mW * 2^6.66666666 = 3.05 mW to reach 110 dB SPL

That's right, a mere 3.05 mW in comparison. That's why you don't NEED a dedicated external headphone amplifier to get the M-100's to sound loud. After all, the purpose of an amplifier is to boost the incoming signal and to provide the proper power for the load (headphone).

Edited by miceblue - 6/18/13 at 3:06pm