Headphones · On-ear · Open-back · Dynamic
Koss Porta Pro
All Koss · 1984 · MSRP $50
The Koss Porta Pro is a lightweight, foldable on-ear headphone introduced in 1984, featuring dynamic drivers and a retro design with foam ear cushions and an adjustable headband. It uses a dual-entry cable and includes a limited lifetime warranty.
Specifications
| Frequency response | 15 Hz – 25 kHz |
| Sensitivity | 101 dB SPL/mW |
| Impedance | 60 Ω |
As stated by the manufacturer — not community data.
Will it drive? · On paper
Plays straight from a phone
A phone or laptop reaches full listening level. An amp is a choice, not a requirement.
| Needs, for 110 dB peaks | 0.69 V · 7.9 mW |
| Phone or laptop (≈0.70 V, 20 mW) | Enough |
| Dongle DAC/amp (≈2.0 V, 120 mW) | Enough |
Worked out from the stated 101 dB/mW and 60 Ω — not a listening test.
Community score
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