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Koss Porta Pro
Impedance 60 Ω
Efficiency 101.0 dB SPL/mW
Frequency Response 15 - 25,000 Hz
Transducer Type Dynamic
Operating Principle Open
Ear Coupling On-ear
Weight 70 g
Target SPL Requirements
Target Power Voltage
90.0 dB 0.08 mW 0.07 Vrms
92.5 dB 0.14 mW 0.09 Vrms
95.0 dB 0.25 mW 0.12 Vrms
97.5 dB 0.45 mW 0.16 Vrms
100.0 dB 0.79 mW 0.22 Vrms
102.5 dB 1.4 mW 0.29 Vrms
105.0 dB 2.5 mW 0.39 Vrms
107.5 dB 4.5 mW 0.52 Vrms
110.0 dB 7.9 mW 0.69 Vrms
Price History
Current $39.99
Highest $70.86
Lowest $39.99
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Model Peak SPL Portable Price
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SMSL SAP-5 SMSL SAP-5 119.4 dB $42.19
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