JaZZ
Headphoneus Supremus
[size=medium]! ! ! CAUTION ! ! ! [/size]
The use of low-impedance headphones with portable MP3 players can damage your bass!
Below a list of frequency response curves showing the synergy between the iPod and different headphones, extrapolated from the 20 ohms response (measured by the German hi-fi magazine «stereoplay»).
Sony MDR-F1 (12 ohms)
20 Hz -17 dB ... 30 Hz -11 dB ... 40 Hz -8 dB ... 70 Hz -5 dB ... 100 Hz -3.5 dB
Reference curve (20 ohms)
20 Hz -10.5 dB ... 30 Hz -7 dB ... 40 Hz -5 dB ... 70 Hz -2.5 dB ... 100 Hz -1.5 dB
Etymotic ER-4P (27 ohms)
20 Hz -8.5 dB ... 30 Hz -6 dB ... 40 Hz -4 dB ... 70 Hz -2 dB ... 100 Hz -1 dB
Grado SR 60 (32 ohms)
20 Hz -7 dB ... 30 Hz -4.5 dB ... 40 Hz -3 dB ... 70 Hz -1.3 dB ... 100 Hz -0.7 dB
Koss Portapro (60 ohms)
20 Hz -3 dB ... 30 Hz -1.5 dB ... 40 Hz -1 dB ... 70 Hz -0.3 dB ... 100 Hz -0.1 dB
Sennheiser HD 590 (120 ohms)
20 Hz -1 dB ... 30 Hz -0.5 dB ... 40 Hz -0.3 dB ... 70 Hz -0.05 dB ... 100 Hz -0.0 dB
JaZZ
The use of low-impedance headphones with portable MP3 players can damage your bass!
Below a list of frequency response curves showing the synergy between the iPod and different headphones, extrapolated from the 20 ohms response (measured by the German hi-fi magazine «stereoplay»).
Sony MDR-F1 (12 ohms)
20 Hz -17 dB ... 30 Hz -11 dB ... 40 Hz -8 dB ... 70 Hz -5 dB ... 100 Hz -3.5 dB
Reference curve (20 ohms)
20 Hz -10.5 dB ... 30 Hz -7 dB ... 40 Hz -5 dB ... 70 Hz -2.5 dB ... 100 Hz -1.5 dB
Etymotic ER-4P (27 ohms)
20 Hz -8.5 dB ... 30 Hz -6 dB ... 40 Hz -4 dB ... 70 Hz -2 dB ... 100 Hz -1 dB
Grado SR 60 (32 ohms)
20 Hz -7 dB ... 30 Hz -4.5 dB ... 40 Hz -3 dB ... 70 Hz -1.3 dB ... 100 Hz -0.7 dB
Koss Portapro (60 ohms)
20 Hz -3 dB ... 30 Hz -1.5 dB ... 40 Hz -1 dB ... 70 Hz -0.3 dB ... 100 Hz -0.1 dB
Sennheiser HD 590 (120 ohms)
20 Hz -1 dB ... 30 Hz -0.5 dB ... 40 Hz -0.3 dB ... 70 Hz -0.05 dB ... 100 Hz -0.0 dB