I have been procrastinating over the past few weeks if it's worth upgrading from my current set of HD555's to the HD650's. I've been running the 555's for over 2 years now on my trusty Pioneer A-335, granted it's not a dedicated headphone amp but its done a stand up job so far. My question is will it be able to cope with the HD650's or will I be wasting my money. I don't ever expect the Pioneer will be able to push the 650's that far, I just want to be a decent listening experience and no damage to equipment thanks.
Specifications of the Pioneer:
Power output: 40 watts per channel into 8Ω (stereo)
Frequency response: 20Hz to 20kHz
Total harmonic distortion: 0.02%
Input sensitivity: 2.5mV (MM), 150mV (line)
Signal to noise ratio: 73dB (MM), 86dB (line)
Output: 150mV (line)