Etymotic Evo Measurements (Frequency Response Graphs) and Comparisons with Etymotic ER2XR

Here are the measurements of the Etymotic Evo Asia Tour review unit done on my IEM Measurement Rig v1.0.

Etymotic Evo Left and Right Channel Frequency Responses with both dual and triple flange tips

Etymotic Evo Average Frequency Responses with both dual and triple flange tips

Etymotic Evo vs Etymotic ER2XR (normalized at 85dB@1kHz)

TCL SOCL300 – Rs. 400 ($5) earphone/IEM with mic

I bought the TCL SOCL300 for around Rs. 400 ($5) from Amazon India.

The earpiece is super tiny and it sounded very weird on first listen with stock M-size tips. Everything seemed to be imaging to the right. I thought it had a channel imbalance so I measured them and it turned out to have great channel matching. Turns out it was a seal issue and going up to the stock L-size tips solved it.

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Etymotic ER4 over the years

Released in 1991, the ER4 was the world’s first noise-isolating high-fidelity in-ear earphone that became the basis of all subsequent in-ear earphones and in-ear monitors worldwide, creating an entire category of consumer electronics. 30 years later, the ER4 is still produced and while it’s changed over the years, it is still channel-balanced to within 1 dB by Etymotic.

If any earphone was to be considered the most significant in earphone history, it would be the ER4, the one that started it all. So I thought it would be interesting to see how it has evolved over the years.

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