Luxman Laboratory Reference Series 5M-21

Data

General

• Manufacturer: Luxman
• Model: Laboratory Reference 5M-21
• Type: DC Stereo power amplifier
• Years of manufacture: 1976 - 1982
• Made in: Japan
• Color: Silver
• Power consumption: 450 W
• Dimensions (WxHxD): 442 x 146 x 400 mm
• Weight: 19 kg
• Original price approx.: 240'000 Yen (Japan, 1976), 1295 US-$, 4'200 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
• VU meter separately for left and right channel
• Sensitivity selector switch for VU meter: 0 dB, - 10 dB
• 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)

• Other models in the same series:
  • 5C-50 Preamplifier
  • 5M-21 Power Amplifier
  • 5T-50 Tuner
  • 5F-70 Tone Control
  • 5G-12 Equalizer
  • 5E-24 Level Meter
  • 5L-15 Integrated Amplifier
  • 5M-20 Power Amplifier
  • 5T-10 Tuner
  • 5K-50 Tape

Pictures

• [[Luxman Laboratory Reference Series 5M-21 Front

• Luxman Laboratory Reference Series 5M-21 Front Right Details

• Luxman Laboratory Reference Series 5M-21 interior view

• Luxman Laboratory Reference Series 5M-21 back panel

• Luxman Laboratory Reference Series 5M-21 back panel detail view right side

• Luxman Laboratory Reference Series brochure image

• Luxman Laboratory Reference Series description from Luxman USA

Reports

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

Links

• External link: "Hifi Archive" website: [2]

• External Link: "Hifi Archive" website: [3]

• External Link: "The Vintage Knob" website: [4]

• External link: Audio Heritage, Japan website: [5]

• Luxman product overview: Luxman