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Superlux HD-681
Impedance 32 Ω
Efficiency 98.0 dB SPL/mW
Frequency Response 10 - 30,000 Hz
Transducer Type Dynamic
Operating Principle Open
Ear Coupling Over-ear
Target SPL Requirements
Target Power Voltage
90.0 dB 0.16 mW 0.07 Vrms
92.5 dB 0.28 mW 0.09 Vrms
95.0 dB 0.5 mW 0.13 Vrms
97.5 dB 0.89 mW 0.17 Vrms
100.0 dB 1.6 mW 0.23 Vrms
102.5 dB 2.8 mW 0.3 Vrms
105.0 dB 5.0 mW 0.4 Vrms
107.5 dB 8.9 mW 0.53 Vrms
110.0 dB 15.8 mW 0.71 Vrms
Price History
updated 1 day ago
Current $34.95
Highest $44.95
Lowest $34.95
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Popular amps for Superlux HD-681

Model Peak SPL Portable Price
SMSL SAP-5 SMSL SAP-5 119.1 dB $49.99
FiiO E10K FiiO E10K 121.0 dB $71.30
Electric Avenues PA2V2 Electric Avenues PA2V2 121.0 dB $70.00
FiiO Fujiyama E06 FiiO Fujiyama E06 118.0 dB $27.99
SMSL SAP-4 SMSL SAP-4 121.0 dB $61.99
FiiO E5 FiiO E5 116.7 dB $20.00
FiiO E11K / A3 FiiO E11K / A3 122.3 dB $59.99