SR-003 In-Ear Earspeakers + SRM-252S Driver Unit The SR-003 is a 5-pin PRO bias type in-the-ear earspeaker, and can be used by connecting to a driver unit having 5-pin PRO bias output socket. Also, the inner type structure of the SR-003 enables you to enjoy excellent electrostatic sound readily without covering your ears. The SR-003 connects to STAX driver units or adapters equipped with 5-pin type PRO bias output. SR-003 Earspeakers Type Electrostatic, In-Ear Frequency Range 20-1kHz ±2dB, 1kHz-20kHz ±4dB Capacitance 44pF including cable Impedance 360KΩ / 10kHz Sensitivity 111dB / 100Vrms / 1kHz Max Sound Pressure 119dB / 1kHz Standard bias voltage 580 VDC Cable 1.5m, 6 strand, Wide format Weight 28g with cable 12g without cable Standard Earpads ? SRM-252S Driver unit Frequency response: DC ~35 kHz 40Vrms when using SR-207 Rated input level: 125 mV with 100V output Maximum input level 30Vrms at minimum volume Amplification: 58 dB (x800) Total harmonic distortion  max. 0.01% at 1 kHz 100Vrms Input impedance 50 kΩ RCA Maximum output voltage: 280Vrms / 1 kHz  Standard bias voltage 580VDC PRO bias Temperature 0~35 degrees, max. 90% (no condensation) DIM 132 × 38 × 132 mm Weight 540g SRS-005S InEar System Weight in Retail Box 1kg		Japan Made. Highest manufacturing standard Contents .. SR-003 Earspeakers 2 pairs Silicone Earbuds, M and L SRM-252S Driver Unit Japan AC100v adapter We sell Voltage Converters. Japanese Manual Supplied by Authorized Resellers in Japan. 1 year Japan Warranty from the day we sent your parcel. We can help you liaise with the maker in Japan. You will pay for postages to/from our Japan office. Singapore and Malaysia buyers can bring/post to us locally. We will deliver FREE to/from Japan. Return postage chargeable.