P/21 vs Porta pro(Yaxi) the 40$ fight of Koss (Long review in coms, and will answer any questions!) : r/headphones
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/cdn.vox-cdn.com/uploads/chorus_asset/file/10774847/akrales_180502_2518_0120.jpg "Koss Porta Pro Wireless review: a classic mistake - The Verge")
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