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Portable earphones – optimal EQ settings (by means of iAudio 7)

Discussion in 'Archived Blogs' started by jazz, Mar 23, 2010.
  1. JaZZ Contributor
    I thought it would be a good idea to make for access to my preferred equalizer settings with my preferred portable earphones on the iAudio 7 with its semi-parametric equalizer. The goal was as flat a preceived frequency response as possible.

    Here they are:


    Sennheiser PX 100

    80 Hz . .. 220 Hz . . 1.4 kHz . . 1.8 kHz . . 13 kHz
    Wide . .., Wide . . .. Wide . . .- Wide . . .- Normal
    –11 dB ,- –6 dB . . . –3 dB . . - –6 dB . . -


    Sennheiser HD 238

    80 Hz . .. 220 Hz . ; 650 Hz . ''' 1.8 kHz . . 13 kHz
    Wide . .., Wide . . .. Wide . . .- Normal . .. Normal
    –7 dB . ., –3 dB . . , . . . . . . . . . . . . –2 dB


    Sennheiser IE 8 (bass tuning +½ mark)

    80 Hz . .. 220 Hz . ; 650 Hz . ''' 4.1 kHz . . 13 kHz
    Wide . .., Wide . . .. Wide . . .- Normal . .. Wide
    –9 dB . ., –6 dB . . , –3 dB . . - –1 dB . . - +2 dB


    Etymotic ER-4P (modified)

    175 Hz .- 220 Hz . ; 650 Hz . ''' 3.0 kHz . . 13 kHz
    Wide . .., Wide . . .. Wide . . .- Normal . .. Normal
    –2 dB . ., . . . . . . . . . . . . –3 dB . . - +3 dB
    Mach3Bass +2


    Phonak Audéo PFE 112 (with grey filter)

    80 Hz . .. 175 Hz . ; 650 Hz . ''' 4.1 kHz , - 9 kHz*
    Normal ... Wide . . - Wide . . .- Wide . . . . Narrow
    –1 dB . ... . . . . .. . . . . . . –3 dB . . - –2 dB
    Mach3Bass +4

    * The ideal center frequency would probably be ~9.7 kHz


    Narrow/Normal/Wide stands for the bandwidth (Q) of the EQ band
    With ER-4P and Audéo additionally Mach3Bass is used, as it provides low-bass enhancement down to 20 Hz, whereas the lowest available EQ frequency band is 80 Hz.


    The following modifications are to be taken into account:

    PX 100: center hole in the foam pad
    ER-4P(T): customized foam tip (hearing-protection foam pierced with a chisel), filter tube filled with lambswool after removal of default filter membrane
    Audéo: special foam tips
     
  2. JaZZ Contributor
    Since my current portable equipment consists of the Sansa Clip Zip, here's the corresponding EQ curves with my most used earphones:
     
     
    Shure SE535
     
    0       0      0    +1/+2   +1
     
     
    Sennheiser IE 8
     
    –8    –4      0      +1   . +5
     
     
    Etymotic ER-4PT
     
    0       0  °   –4  °  –5     .0
     

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