I recently got the Sennheiser HD8 DJ's because I like loud, powerful bass.
I have an unorthodox setup though. I'm using a Onkyo TX SR701 home stereo receiver, which has dual 32 bit DSP and 192 kHz/24-bit audio DACs. My audio source is via optical from my PC's Realtek sound card.
I just thought I'd leave my experience here since I can't find a single person from any Google search that had similar concerns as I did with using home stereo equipment to power headphones, instead of the traditional headphone specific DAC and amp.
The HD8 DJ's are rated at 95 ohms but that isn't a problem for my Onkyo receiver. It's amp is rated at 100W x2 but obviously internal circuitry adjusts the output according to headphone impedance. However there is NO INFORMATION ANYWHERE about the amp's power specs for headphones, namely impedance ranges. Which, left me concerned if it could power 95 ohm headphones (originally I was considering 250 ohm headphones).
So if anyone has a similar setup or was considering it, let me say you have nothing to worry about. The Onkyo was able to power my headphones easily and they get extremely loud (they're rated up to 115 dB). I also use software EQ settings for bass gain, and to adjust midrange and treble that are lacking with these headphones.
