What rig do you have that can measure an IEM before and after EQ? I'd like to get one and start playing around with it.
I don't have a measurement rig. I use the open databases from
https://squig.link/ and
https://crinacle.com/graphs/iems/graphtool/ . On
https://squig.link/ there are a lot of reviewers that share measurements. I was actually thinking about buying an iec711 coupler, but I'm not sure if it's worth it. As far as I understand the measurements are accurate until around 5-7KHZ. I compared multiple IEMs on the platforms and the measurements are quite similar up to that region so I can mostly rely on the data that was already measured. But everything after 5-7KHZ is not really accurate and varies from each other. E.g. here are 3 different Traillii measurements:
Additionally there is unit variation in IEMs and the measurement tool. If you look at the Supermoon measurements they are even more different in the treble region.
So I am not sure how much additional value it would add if I own a measurement rig. I'd be sure about frequencies up till 5-7KHZ which I am already as there most of the IEMs are already measured mutliple times. And for the treble it would not help me at all.
What EQ settings have you used for SM above please?
Most of the measurement links I have mentioned abouve have an "Equalizer"-Tab. There you can select another IEM or target curve and automatically generate an EQ Profile. You can also select the frequency range that you want the auto-eq to be applied. It is adviced to go to max. 7KHZ due to the measurement inaccuracy.
So this is how it looks for the SM. I started from 300 HZ as I like the bass how it is. This time I went up till 15KHZ as I sometime try how it sounds. If it sounds good I leave it, otherwise I would go down to 7KHZ.
I then fine tuned the upper mids and treble, I added a 2DB high shelf as it sounds more similar to it's stock tuning, but overall I get away from the annoying peaks that bothered me before.
Preamp: -4.0 dB
Filter 1: ON PK Fc 300 Hz Gain -1.9 dB Q 0.500
Filter 2: ON PK Fc 410 Hz Gain 1.6 dB Q 1.600
Filter 3: ON PK Fc 650 Hz Gain 2.0 dB Q 1.400
Filter 4: ON PK Fc 2200 Hz Gain -4.4 dB Q 2.000
Filter 5: ON PK Fc 3700 Hz Gain 3.5 dB Q 2.000
Filter 6: ON PK Fc 6600 Hz Gain 4.1 dB Q 2.000
Filter 7: ON PK Fc 8700 Hz Gain -10.0 dB Q 2.000
Filter 8: ON PK Fc 13000 Hz Gain 8.0 dB Q 2.000
Filter 9: ON PK Fc 15000 Hz Gain -7.4 dB Q 0.500
Filter 10: ON HSC Fc 2000 Hz Gain 2.0 dB Q 0.900