Najwyższy model z tej linii tożsamy z modelem 1550.
poza jedną przewagą, modele z serii MR mają bardzo ładne drewniane obudowy.


Marantz MR 250(L)

1974r.

Receiver

Rated output per channel:
DIN 4 ohms (1 kHz): 98 W
FTC 4 ohms (20 Hz - 20 kHz): 55 W
DIN 8 ohms (1 kHz): 64 W
FTC 8 ohms (20 Hz - 20 kHz): 50 W
Total Harmonic distortion at rated output: 0.15%
Damping: 40

Frequency response:
Phono (RIAA): ±1 dB
Aux (±1dB): 18 - 30 Hz/kHz
Main in (± 1 dB): 18 - 30 Hz/kHz
Signal/Noise ratio:
Phono: 72 dB
Aux. Output: 80 dB
Input Sensitivity/Imp:
Phono: 2.8/47 mV/k ohms
Auxiliary: 180/20 mV/k ohms

Separation:
Phono (1 kHz): 35 dB
Aux. (1 kHz): 43 dB
Main in (1 kHz): 55 dB

FM Stage (87.5 - 108 MHz):
Sensitivity:
DIN Mono (S/N 26 dB 75 ohms): 1 µV
DIN Stereo (S/N 46 dB 75 ohms): 25 µV
IHF Mono: 10.8/1.9 dBf/µV
Selectivity/Adjacent channel 98 MHz ± 300 Hz: 65 dB
Signal/Noise ratio 98 MHz:
Unweighted:
Mono: 62 dB
Stereo: 55 dB
Weighted:
Mono: 66 dB
Stereo: 60 dB

MW stage (525 - 1605 kHz):
Sensitivity (26 dB S/N 30% mod. 1 MHz): 30 µV
Selectivity: 20 dB

LW stage (150 - 350 kHz):
Sensitivity (26 dB S/N 30% 250 kHz): 250
Selectivity (250 ± 9 kHz): 24

Width: 440mm
Height: 137mm
Depth: 358mm
Weight net: 12.0kg