Hifiman HM-801: high output impedance sounds very musical!
Sansa Clip+: flat FR sounds dull, lifeless!
iBasso DX100: flat FR sounds full, realistic!
Unnamed DAP: bass and treble roll-off sounds very analog, non fatiguing!
Hifiman HM-801 again: sounds awesome no matter what!
That's the problem with audiophiles: there's no reference, no common ground, no consistency. Everyone hears what they want, and every opinion is valid as long as audiophile products are praised and non audiophile products are bashed (the AK100 being a paradox of sorts, further emphasizing the general state of inconsistency - iRiver is probably not "audiophile" enough).
Warning: Spoiler! (Click to show)
- First two graphs: DAPs with high output impedance, loaded with non-flat impedance IEMs, result in emphasized mids and recessed highs.
- Graphs 3 and 4: DAPs with low output impedance, resulting in a "high fidelity" signal, close to the recording, with no deviation whatsoever.
- Graph 5: DAP with high output impedance loaded with a particular set of cans, resulting in recessed bass and highs.
- Graph 6: DAP with high output impedance, loaded with various cans, resulting in widly varying frequency reponses (emphasized mids, and emphasized or recessed highs, depending on the headphones used).
Edited by skamp - 2/15/13 at 8:45am