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What are the differences between the Audio Technica ATH-M20X, M30X and M40X? Are there any major differences, or would the M20X do just as well?
How about frequency response and sound isolation?
The ATH-M20X has a frequency response of 15Hz-20kHz, while both the M30X and M40X have a wider range of 15Hz-22kHz. The M40X also has better sound isolation, designed for use in loud environments.