Nakamichi SR-4 E

Data

General

• Manufacturer: Nakamichi
• Model: SR-4E
• Type: Receiver
• Years of manufacture: 1988 - 1990
• Made in: Japan
• Color: Black
• Remote control: no
• Power consumption: max. 350 W
• Dimensions (WxHxD): 430 x 100 x 370 mm
• Weight: 9.8 kg
• Original price approx.: 2'500 DM

Connections

• Number of inputs:
  • 2x Video/Aux (200 mV, 20 kOhm)

1x VCR/Tape2 (200 mV, 20 kOhm) 1x Tape In (200 mV, 20 kOhm) 1x CD In (200 mV, 20 kOhm) Phono (MM 140 mV; 47kOhm / MC 3/8 mV; 100 Ohm )

• • FM antenna (75/300 Ohm)
  • AM antenna
• Number of outputs:
  • 1x Tape Out
  • 1x Video/Tape2 Out
  • 1x Monitor Out
  • Headphones (6,3mm jack)
  • 2 pairs of speakers
  • Processor Loop OUT/IN f. Equalizer/ Surround

Technical Data

Amplifier

• Sine continuous power

8 Ohm: 2x 60 W (DIN),

• pulse power
  • 8 Ohm: 2x 85W
  • 4 Ohm: 2x 125W
• Total harmonic distortion: 0.1% (at nominal power)
• Attenuation factor: 77 (8 Ohm)
• Frequency response: 20 - 20,000 Hz (+0; -1 dB, Germany model)
• Frequency response: 20 - 20,000 Hz (+0; -0.5 dB, Germany model)
• Frequency response: 5 - 45,000 Hz (+0; -3 dB, Germany model)
• Frequency response: 5 - 75,000 Hz (+0; -3 dB, otherwise)
• Signal-to-noise ratio:
  • Phono: better 78 dB MM; 71 dB MC
  • Power amplifier: better 105 dB
• Tone control:
  • Bass: yes
  • Mids: no

treble: yes

• Loudness: variable Loudness
• Subsonic: yes
• Mute: Yes
• Direct/Line-Straight:

Tuner

• Reception: FM, MW
• Frequencies:
  • FM: 87.4 - 108 MHz
  • MW: 515 - 1.611 kHz
• Frequency response: 20 - 15,000 Hz
• Input sensitivity:
  • FM Mono: 23 dBf / 7.7 müV

VHF Stereo: 43 dBf / 77.4 müV MW: 53 dB mü/m Distortion factor FM: less than 0.2 Distortion factor MW: less than 0.3 Signal-to-noise ratio: 74 dB (mono), 69 dB (stereo)

• Signal-to-noise ratio:
• Channel separation: better 43 dB (1kHz)
• selectivity FM: 70 dB (+/-300kHz)
• selectivity MW : 20 dB (+/-9kHz)
• Co-wave selection: 2.0 dB
• Spurious suppression: better 90 dB
• IF attenuation: better 75 dB
• IF attenuation: better 80 dB
• AM rejection: better 60 dB
• Output level:
• RDS: no
• Station memory: 10

Special Features

• Remote control

Remarks

• Other models in the same series:
• Nakamichi SR-2 E
• Nakamichi SR-3 E
• Nakamichi SR-4 E

• [[Successor series:
• Nakamichi TA-2 E
• Nakamichi TA-3 E
• Nakamichi TA-4 E

• STASIS - circuit licensed to Threshold Co.

Reports

• Rainer Kruse at hifi-classic-reparatur.de (April 2, 2014), see also link below:
• "The Stasis circuit developed by Threshold, guarantor for load stable power supply in the low impedance power range, worked in the well-known power amplifiers, and in the flat receivers!".

The SR-2,3 and 4 receivers, the SR-4 even remote controllable, had a good sounding phono section (the 2 unfortunately only MM) and of course an excellent tuner built in. Sound-wise, these parts tend to have a natural low and wide, rather than high, stage.

• An SR-4 sounds much more natural than, say, an Accuphase E-206, which plays louder and bigger, but much less musical.

Details are beautifully resolved with an emphasis on subtleties and textures, analytical in the best sense.

• At the same time the parts still look smart and are well adjustable, just no debris.
  
• If you get your hands on a semi-maintained unit today, after more than 20 years, they run flawlessly. A manufacturing quality that the Europeans and Yanks were running after!"

• Report in "FonoForum" 7 / 1988

Links

• Nakamichi SR receiver review with nice catalogue picture at hifi-classic-reparatur.de from April 2, 2014, retrieved December 17, 2017.