HP-V57

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Year: 1988
Frequency Response (Hz): 10-25,000
Sensitivity (dB/mW) : 104
Impedance (Ohms):16
Review / Info: Features an in-line volume control and uses samarium cobalt drivers ($35 in 1990). Has the same specs and appearance as the HP-V53 (no in-line feature) and has been confirmed to have the same construction and internals, except for the added in-line controls of the HP-V57. The HP-V59 includes an in-line volume control and a mono/stereo switch.