|
| Marantz Model 1200 |
295,000yen(at the 1972 time(? )) |
The Integrated Amplifier which packed control
amplifier Model3300 and the Koide power version of power amplifier Model240 into
one.
Except for the difference in an output, the circuitry of a main
part is the same stream composition as Model240, and has adopted the
differential amplification, the pure complimentary, and the whole page
hardwired-connection OCL circuitry.
Moreover, the transistor of a pair is prepared for the completeness chosen
also as the differential-amplification stage or the output stage of a push
pull, and it is adjusted so that the basic circuit itself may carry out
a direct-current balance completely naked. The power transistor is used
with 2 stone parallel push pull.
Moreover, an
idling electric current is fully sent, and while AB class operation is
maintained also at the time of low level and it decreases a notching distortion
peculiar to a transistor etc., the higher-order and the oddth distorted measure are performed.
The pre part serves as the same circuitry as Model 3300, and has adopted the hardwired-connection circuitry where the equalizer stage,
the tone control stage, and the amplification stage also used the differential
circuit for the first rank.
About the contact of the switchpoint,
gilding is not used easily, but a contact surface product is fully taken, and
the method of adjusting contact resistance moderately is taken.
A cut
core is used for a power transformer and the flux itself is held down to it by
the transformer around which the short ring was wound.
|
| Form |
Console stereo amplifier |
| <Power amplifier part>
|
Continuous rating output
(Both channel, 20Hz - 20kHz) |
4ohm: 125W+125W
8ohm: 100W+100W
16ohm: 50W+50W |
| THD |
0.15% or less (at the time of 20Hz -
20000Hz, and an Output power) |
| Cross modulation distortion |
0.15% or less (at the time of 20Hz -
20000Hz, SMPTE, and an Output power) |
| Frequency characteristic |
6Hz-80000Hz+0 -3 dB
20Hz-20kHz±0.25dB
|
| a power band -- the Wiz |
10Hz - 40000Hz |
| Dynamic range |
100dB |
| Channel separation |
60dB |
| Dumping factor |
100 (8ohms) |
| Tone control |
Treble: ±10dB (10kHz)
Bass: ±10dB
(100Hz) |
| <Preamplifier part>
|
| Input sensitivity/impedance |
Phono: 1.35mV/47kohm
High SFT Level:
135mV/100kohm |
| An Output voltage/impedance |
Tape Recorder: 3V/1kohm
Headphones:
More than 3V/8ohm
Center Channel: 3V/1kohm |
| Filter |
High Filters: 5kHz, 9kHz
Low Filters:
50Hz, 100Hz |
| <Synthesis>
|
| Power source |
AC100V, 50Hz/60Hz |
| Power consumption |
420W |
| Dimensions |
Width 390x height 146x depth of 356mm
|
| Weight |
14.1kg |
|
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