These headphones only have about 5 hours of listening time on them. They have great sound and new you can buy them for between $99.00 - $150.00

PreSonus® HD9 professional studio headphones feature 45 mm dynamic, neodymium drivers in a closed-back acoustic design that provides superior listening isolation and reduces headphone bleed. Its tailored frequency response extends all the way from 10 Hz to 26 kHz, with accurate bass response, enabling precise mixes. The HD9 offers high power handling (900 mW per channel into 40 ohms) while providing comfort, durability, and reduced listening fatigue.

High resolution drivers
Precision-tuned acoustic chamber
Extended bass response
Comfortable and long-lasting ear pads
Lightweight

https://www.presonus.com/en-US/misc/more/headphones/2777200103.html
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