Hitachi SR-904 specifications

Category : Receiver

Brand : Hitachi

General

Connections

Technical data

Amplifiers

Tuners

Special equipment

• Manufacturer: Hitachi
• Model: SR-904
• Type: Receiver
• Years of construction: 1979 - 1980
• Made in: Japan
• Color: Silver
• Remote control: no
• Power consumption: 250 W
• Dimensions: 490 x 144 x 400 mm (WxHxD)
• Weight: 13.5kg
• Factory price approx.: 1'200 DM

• Number of inputs:
  • Phono: 2.5mV / 47 k643961b8da111c0a15d770a1109a86d4, 220 mV max.
  • Aux: 200 mV / 50 k643961b8da111c0a15d770a1109a86d4
  • Tape Play 1, 2: 200mV / 50 k643961b8da111c0a15d770a1109a86d4
  • Tape Play DIN 1, 2: 500 mV / 80 k643961b8da111c0a15d770a1109a86d4
  • Adapter: 200 mV / 50 k643961b8da111c0a15d770a1109a86d4
  • Antenna FM / MW: 75 643961b8da111c0a15d770a1109a86d4 / 300 643961b8da111c0a15d770a1109a86d4
• Number of outputs:
  • Tape Rec 1, 2: 200 mV
  • Tape Rec DIN 1, 2: 50 mV
  • Headphones
  • 2 pairs of speakers

• Phono: 2.5mV / 47 k643961b8da111c0a15d770a1109a86d4, 220 mV max.
• Aux: 200 mV / 50 K-ohms
• Tape Play 1, 2: 200 mV / 50 K-ohms
• Tape Play to DIN 1, 2: 500 mV / 80 k643961b8da111c0a15d770a1109a86d4
• Adapter: 200 mV / 50 K-ohms
• antenna FM / MW: 75 643961b8da111c0a15d770a1109a86d4s / 300 643961b8da111c0a15d770a1109a86d4s

• Tape Rec 1, 2: 200 mV
• Tape Rec DIN 1, 2: 50 mV
• headphones
• 2 pairs of Speakers

• continuous power output (DIN)
  • 8 643961b8da111c0a15d770a1109a86d4: 2x 75 W (RMS , 20 - 20, 000 Hz)
  • 4 643961b8da111c0a15d770a1109a86d4: 2x 100 W
• dynamic performance
  • 8 643961b8da111c0a15d770a1109a86d4: 2x 150 W
  • 4 643961b8da111c0a15d770a1109a86d4:
• total harmonic distortion: with 0.09% (at nominal power)
• damping factor: 45
• frequency response: 10 - 40'000 Hz, ± 1.5 dB
  • performance range: 8 - 40'000 Hz
• signal-to-noise ratio: (external voltage)
  • Phono: 75 dB
  • high level: 87 dB
• control:
  • Bass: ± 10 dB at 50 Hz, 100 Hz
    • Kippfrequenzen sound: 150 Hz, 300 Hz
  • in the Middle: ± 6 dB at 1 kHz
  • treble: ± 10 dB at 10 kHz, 20 kHz
    • Kippfrequenzen: 3 kHz, 6 kHz,
• Loudness: + 9 dB at 100 Hz, + 4 dB at 10 kHz
• High Filter : - 8 dB at 10 kHz, 12 dB / octave
• Low Filter (Subsonic): - 8 dB at 50 Hz, 12 dB / octave
• Mute:

• 8 643961b8da111c0a15d770a1109a86d4: 2x 75 W (RMS , 20 - 20, 000 Hz)
• 4 643961b8da111c0a15d770a1109a86d4: 2x 100 W

• 8 643961b8da111c0a15d770a1109a86d4: 2x 150 W
• 4 643961b8da111c0a15d770a1109a86d4:

• performance range: 8 - 40'000 Hz

• Phono: 75 dB
• high level: 87 dB

• Bass: ± 10 dB at 50 Hz, 100 Hz
  • Kippfrequenzen: 150 Hz, 300 Hz
• in the Middle: ± 6 dB at 1 kHz
• treble: ± 10 dB at 10 kHz, 20 kHz
  • Kippfrequenzen: 3 kHz, 6 kHz,

• Kippfrequenzen: 150 Hz, 300 Hz

• Kippfrequenzen: 3 kHz, 6 kHz,

• receiving: FM, MW
• frequency:
  • FM: 88 - 108 MHz
  • MW: 530 - 1'605 kHz
• frequency response: 30 - 15 000 Hz, + 0.5 dB, - 1 dB
• input sensitivity:
  • FM: 1,6 µV
  • am: 20 µV
• total harmonic distortion:
  • FM: 0,2% (Mono) 0.3% (in Stereo)
  • MW: 0,2%
• signal-to-noise ratio:
  • FM: 74 dB / 68 dB (Mono/Stereo)
  • MW: 50 dB
• channel separation: 45 dB
• selectivity:
  • FM: 85 dB
  • MW: 40 dB
• frequency selection:
  • FM: 1 dB
• in addition to the wave selection: 100 dB
• mirror frequency attenuation:
  • FM: 85 dB
  • MW: 70 dB
• ZF-loss:
  • FM: 100 dB
  • MW: 90 dB
• ON-suppression: 55 dB

• FM: 88 - 108 MHz
• MW: 530 - 1'605 kHz

• FM: 1,6 µV
• am: 20 µV

• FM: 0,2% (Mono) 0.3% (in Stereo)
• MW: 0,2%

• FM: 74 dB / 68 dB (Mono/Stereo)
• MW: 50 dB

• FM: 85 dB
• MW: 40 dB

• FM: 1 dB

• FM: 85 dB
• MW: 70 dB

• FM: 100 dB
• MW: 90 dB

• Pre-/power amplifier can be separated
• 2 VU-meters
• FM Muting, Auto Lock

• Other models from the same series:
• Hitachi SR-504
• Hitachi SR-604
• Hitachi SR-804
• Hitachi SR-904
• Hitachi SR-2004

• image: Hitachi SR-904

• report in the "Good Old Hi-Fi": [[1]]

• report in the "Good Old Hi-Fi": [[2]]

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