Yamaha Natural Sound R900 Recevier

Model: R-900

Type: Receiver

Years of manufacture: 1981 - 1982

Made in: Japan

Color: Silver

Remote control: no

Power consumption: 430 watts

Dimensions: 480 x 122 x 337 mm

Weight: 9.5 kg

Original price approx.: 550 US-$ (1982), 1'450 DM

Connections

Number of inputs:

Phono MM/MC: 2.5 mV/47 KOhm, MC: 120 µV/100 Ohm.

Aux, 2x Tape: 120 mV/47 KOhm

Main-In: 1 V/47 KOhm

Number of outputs:

2x Rec-Out: 120 mV/470 Ohm

Pre-Out: 1 V/1.6 KOhm

Headphones: 259 mW

Technical Data

Amplifier

Continuous power (at distortion factor)

8 Ohm: 2x 70 Watt at 0,015%, 2x 78 Watt according to DIN

4 Ohm: 2x 100 Watt at 0,5%

Dynamic power

8 Ohm:

4 Ohm:

Total harmonic distortion: 0.005%

Attenuation factor: > 40

Frequency response: 5 - 100000 Hz

Signal to noise ratio: 100 dB

Tone control:

Bass: ±10 dB at 50 Hz

Treble: ± 10 dB at 20000 Hz

Loudness: adjustable

Subsonic: 15 Hz/12 dB, switchable

Mute: no

Direct/Line-Straight: no

Stereo channel separation: 53 dB

Tuner

Reception: FM, MW

Frequencies:

FM: 87.6 - 108 MHz

MW: 525 - 1605 KHz

Frequency response: 30 - 15'000 Hz

Input sensitivity: 1.2µV/30µV (Mono/Stereo DIN)

Distortion factor: 0.07

Signal to noise ratio: 74 dB (Stereo DIN)

Channel separation: 50 dB

Selectivity: 68 dB

Co-wave selection: 1.5 dB

Spurious wave selection: 100 dB

Image frequency attenuation: 62 dB

IF attenuation: 100 dB

AM suppression: 65 dB

Output level:

RDS: no

Station memory: 5 FM, 5 MW