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  • Original low noise dual FET at first stage as well as all stage direct coupling Class A DC amplifier configuration with no coupling capacitor has realized natural tone quality with large amount of information
  • Further improved emitter follower at output stage has enabled wide range reproduction resulting in both the extended dynamic range at high frequency and improved over all tonal quality
  • In addition to RCA input terminal, XLR balanced input terminal has been added to provide connection to wide range of audio equipment
  • Custom made 2 axis 4 gang volume control
  • Extravagant non-magnetic aluminum alloy chassis
  • Components with little aging characteristics are hand selected for tonal quality and performance
Type All-stage semiconductors, Low-noise dual FET input Class A operation, Pure balance DC amplifier configuration Earspeaker driver unit
Frequency response DC to 90,000Hz (with 1 SR-L series Earspeaker)

High Harmonic Distortion

Max 0.01% (1kHz at 100V r.m.s. with SR-L500)


60dB (x1000)

Input Terminal 1 RCA with 1 RCA parallel out and XLR

Rated Input Level

100mV / 100V Outputs

Max. Input Level 30V (at minimum volume level)

Input Impedance

50KΩ(RCA) 50KΩx2(XLR)

Max. Output Voltage 400V r.m.s. (1kHz)
Standard Bias Voltage PRO 580V x 2
Power Voltage Frequency 117V (50Hz / 60Hz)
Power Consumption 30W
Temperature & Humidity 0 to 35ºC / 90% max. without condensation
Dimensions 5.9 (W) x 3.9 (H) x 14.2 (D) in
Weight 6.6lbs
Colour Silver
Voltage 240V

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