I am a student pilot, and am about to buy a headset.

I would buy an inexpensive headset that has decent passive attenuation. Your
FBO probably rents headsets at something like $5 a day. Buying one of them
outright (new) would be about $100. Just do that and take your training. By
the time you have your license, you'll have a better idea of what you want, and
then buy that. Keep the old one for your passenger.

Jose

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