Marantz Model 2252B

1 9 7 7 1977
1 9 7 9 1979

Old-school high-fidelity from when Superscope owner already was in financial trouble but nevetheless still had californian Marantz and japanese SRC subsidiaries design sane components producing sane WATTS : when 2x 52W felt like 2x 520W.

DC symmetrical SEPP output with one big trafo, two big caps, four pairs of Marantz-tagged bipolar transistors (A753 / C1343) mounted on big heatsinks - the word is big, yes ?

Also Gyro-geared PLL MPX dual-gate MOS-Fet 4-gang tuner section (3 for FM) with 200Khz ceramic filters and Baxandall triple L/R tone controls.

Feature-packed indeed for 1977.
And solid.
And loud.



Nudies at audiovintage.fr and photos at TVC.

Marantz Model 2252B, image 1 Marantz Model 2252B, image 2 Marantz Model 2252B, image 3
Marantz Model 2252B specifications
Title Value
POWER AMP section POWER AMP section
RMS Output power : 2x 52W (8 Ohm, 20Hz...20Khz, both channels)
2x 65W (4 Ohm, 20Hz...20Khz, both channels)
DIN 45500 output power : 2x 70W (8 Ohm)
2x 105W (4 Ohm)
Sinus output power : 2x 75W (8 Ohm)
2x 135W (4 Ohm)
THD : 0,05% (8 Ohm)
0,1% (4 Ohm)
IMD : 0,05% (IHF)
Damping factor : 45 at 20Hz
PREAMP section PREAMP section
Phono input : 100mV (1Khz)
Phono input equivalent noise : 1,5µV
Phono dynamic range : 96dB (input load vs. equivalent noise ratio)
Phono input sensibility : 1,8mV (for 47kOhm load)
Phono S/N ratio : 76dB (for 7,75mV input)
Phono RIAA accuracy : ± 0,75dB (20Hz...20Khz)
Line inputs : 180mV / 20kOhm (aux & tape)
Line S/N ratio : 90dB (for 7,75mV input)
Outputs : 600 Ohm (tape rec)
900 Ohm (preamp out)
FM section FM section
Sensitivity : 1,9µV
50 dB quieting sensitivity : 40µV (stereo)
3,2µV (mono)
THD : 0,15% (stereo)
0,30% (mono)
Frequency Response : 30Hz...15KHz (+0.2 / -1.5dB)
S/N ratio : 73dB
Capture ratio : 1,0dB
IF image rejection : 70dB
IF rejection 95dB
Subcarrier rejection 60dB
Alt. channel selectivity : 70dB
Spurious rejection : 90dB
AM rejection : 50dB
Stereo separation : 45dB (1Khz)
AM section AM section
Sensitivity : 15µV
Alt. channel selectivity : 46dB
IF rejection : 40dB
Image rejection : 45dB
THD : 0,5% (30% mod.)
S/N ratio : 50dB
Spurious response rejection : 60dB
General General
PC : ?
Dimensions : 44 x 13,7 x 36,5cm
Weight : 14kg.
Marantz Model 2252B : 0 topic
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page online since : september 2010
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