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Superlux HD-668B
Impedance 56 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 0.09 Vrms
92.5 dB 0.28 mW 0.13 Vrms
95.0 dB 0.5 mW 0.17 Vrms
97.5 dB 0.89 mW 0.22 Vrms
100.0 dB 1.6 mW 0.3 Vrms
102.5 dB 2.8 mW 0.4 Vrms
105.0 dB 5.0 mW 0.53 Vrms
107.5 dB 8.9 mW 0.71 Vrms
110.0 dB 15.8 mW 0.94 Vrms
Price History
Current $35.95
Highest $69.99
Lowest $35.95
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Popular amps for Superlux HD-668B

Model Peak SPL Portable Price
FiiO Fujiyama E06 FiiO Fujiyama E06 115.6 dB $27.99
SMSL SAP-5 SMSL SAP-5 116.7 dB $42.19
FiiO E11K / A3 FiiO E11K / A3 119.9 dB $59.99
Electric Avenues PA2V2 Electric Avenues PA2V2 118.6 dB $70.00
Cypher Labs Duet Cypher Labs Duet 117.5 dB $956.37
FiiO K1 FiiO K1 111.0 dB $39.99
SMSL MINI 5 SMSL MINI 5 116.7 dB $64.95