Here's my latest custom EQ curve for Westone 4/4R (they are identical sounding, except for the matched drivers of the 4R).
This is only for the TRIPLE-FLANGE tip. I do not use other tips because they aren't as ergonomic or don't seal as well, and also because the triple-flange is the only tip that gets rid of most of the ear canal resonance because they fill up more of your ear canal than other tips.
This EQ curve is carefully tweaked by first referencing Tyll Hertsens' measurements (I've been waiting for him to measure the Westone 4 for years, and he's finally done it), and then meticulously tweaked by referencing pink noise and then referenced against my LCD-2 with custom EQ curve applied. I then double-check by testing with my select playlist of testing tracks I've been using for many years, swapping between the LCD-2 and Westone 4. I then triple-checked by making sure my custom EQ for the LCD-2 is in fact, still as accurate as it should be (using pink noise and test tracks), and then do another round to matching the two, and then one last round of checking the Westone 4 with pink noise tests and test tracks.
I found that for this particular case, you can't just EQ the Westone 4 based on the measurement graph, and if you do, it'll be too bright and shrill. What you should do instead, is to use the measurement graph to set your EQ points as according to the graph, and then play pink noise and take each node and restrict the movement to only vertical, and start moving it up and down so you can get familiarized with what too much and too little of that frequency range sounds like, and then set it at the spot that sounds the most even with the rest of the frequency spectrum. You do that for every node until you have a very balanced sound across the frequency range. This method is the best way to ensure you get what sounds accurate TO YOUR OWN EARS, because we all have slightly different hearing, and if you set it to sound balanced to your own hearing, then it can't get more accurate than that.
The settings are:
150 Hz, -3 dB, 2.37 oct
5,500 Hz, +3 dB, 1.02 oct
10,000 Hz, -10 dB, 0.6 oct
20,000 Hz, 10 dB, 1.13 oct
Please use any of the free online bandwidth to Q translators if your EQ uses Q instead.
Does this looks correctly adjusted or translated into the Accudio Golden Ears app GEQ ?
Please let me know if this is correct or wrong based on the following value:
13000 Hz, 12 dB, 0.55 oct
7000 Hz, -12 dB, 0.25 oct
40 Hz, 4 dB, 3 oct
150 Hz, -3 dB, 2.37 oct
5.500 Hz, -3 dB, 1.02 oct
10.000 Hz, -10 dB, 0.6 oct
20.000 Hz, 10 dB, 1.13 oct