Luxman Laboratory Reference Series 5M-20

Data

General

  • Manufacturer: Luxman
  • Model: Laboratory Reference 5M-20 (identical to 5M-21, but without VU meter)

Type: DC Stereo power amplifier

  • Years of manufacture: 1977 - 1982
  • Made in: Japan
  • Color: Silver
  • Power consumption: 450 W
  • Dimensions (WxHxD): 442 x 146 x 400mm
  • Weight: 18.8 kg
  • Original price approx.: 210'000 Yen (Japan, 1977), 1095 US-$, 2'950 DM


Connections

  • Number of inputs:
    • Direct in: 890mV, 50 kOhm
  • Number of outputs:
    • 2 x loudspeaker

1 x headphone jack


Technical Data

  • Continuous power (at THD)
    • 8 Ohm: 2 x 100W (10 Hz ... 20 kHz, 0.005% THD)
    • 4 Ohm: 2 x 150W DIN
  • Dynamic power
    • 8 Ohm:
    • 4 Ohm:
  • Total harmonic distortion: < 0.005%.
  • Attenuation factor: 80 at 8 Ohm
  • Frequency response: 0 - 100'000 Hz (- 1 dB)
  • Signal to noise ratio: >120 dB
  • Crosstalk attenuation: - 70 dB (20 Hz ... 20 kHz)
  • Noise voltage:


Special Features

  • Real Time Processed DC Stereo Power Amplifier
  • Function indicator lamp: "White" = Normal operation, "Red" = DC Offset
  • Separate level controls L / R on rear panel
  • Switch on rear panel for loudspeakers: "Direct Coupling - General Speaker", "Input Capacitor - Elektrostatic Speakers
  • Output for peak LED display


Remarks

  • The Luxman Laboratory Reference Series made its debut in 1976.
  • Highlights included the first Real Time Processed DC amplifier and the first synthesizer tuner.
  • Other components of the Laboratory Reference Series included the 5C-50 preamplifier and the 5M-21 power amplifier, the 5G-12 Graphic Equalizer, the 5F-70 Parametric Tone Control, and the 5E-24 LED Level Meter Unit.
  • In 1977 and 1978, the Luxman Laboratory Reference Series was expanded to include the 5L-15 integrated amplifier, the 5M-20 power amplifier without VU meter, and a less expensive tuner, the 5T-10, and the 5K-50 cassette tape deck, the latter of which was probably obtained from a third-party manufacturer.
  • The functionality, performance and innovative design made the series unique and distinctive.
  • Special features were:
    • World's first DC amplifier and synthesizer tuner.
    • Computer controlled cassette deck

Stackable components (the 4 device feet had corresponding recesses with the device standing underneath)



Pictures

  • [[Luxman Laboratory Reference Series 5M-20 Front

Luxman 5M-20-3.jpg

  • Luxman Laboratory Reference Series description from Luxman USA

Luxman Laboratory USA Series-2.jpg


Reports

  • External report: "Hifi Studio" website: [1]


Links

  • External link: "The Vintage Knob" website: [2]
  • External link: Audio Heritage, Japan website: [3]

Luxman Product Overview: Luxman