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| NEC A-10 |
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| 99,800yen(March 21, 1983 release) |
The Integrated Amplifier which poured in all the
technologies that ask for the ideal which should have amplifier, and carry out
thorough serious consideration of the basic performance, and NEC can have, and
was completed.
In addition to 5 power-source parts of a stage
independency, the newly developed reserve power source is carried in the
power-source part.
Since an electric current was a discontinuous pulsating
flow by the repetition which are 100Hz - 120Hz in the case of the conventional
capacitor input type power source, even if the time when an electric current is
not flowing arose and it was going to acquire the Oide power at the time of an
electric discharge of a capacitor, there was a fault that supply voltage fell.
The reserve power source was developed in order to conquer this fault, the
2nd power source works and at the moment of the charging current being disrupted
comes the structure of bringing the charging current close to the continuous
uniform fluence.
Thereby, it became small, the impedance of the power source also fell, and the peak value of the charging current has measured the
enhancement of current-supply-source capacity. Moreover, a power-source ripple
of about 8dB also improves, and enables the low-pass play distorted also at the
time of the Oide power which is not.
High gain MC head amplifier is
carried.
It is Takamasa who connected three para pushes of low-noise high
gain FETs, and the size of the output by the difference in the type of a
cartridge is supported by a low position and high position equipment.
The operation switchpoint which can be used making a preamplifier part
and a power amplifier part become independent is carried.
If a switchpoint
is made into "SEPARATED", the input of a power amplifier part and the output of
a preamplifier part will be separated, and it will become an enable
independently, respectively.
Moreover, the input level of the power
amplifier part serves as a right-and-left independent variable type.
The
Subsonic Filter is carried.
Three steps (-10, -20, -30dB) of attenuator are carried.
When
using independently a balance control or power amplifier, the power output level
control which can be used as an output volume is carried.
The REC
serector is carried.
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| Form |
High-quality integrated amplifier
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| <Power amplifier part>
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| Circuit system |
Whole page direct DC servo circuitry
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Effective output (both channel drive)
A
sinusoidal consecutive output, 20Hz - 20kHz |
120W+120W (4ohm)
60W+60W (8ohm) |
| THD (at the time of an effective output)
|
0.003% or less |
| Cross modulation distortion (at the time of
an effective output) |
0.003% or less |
| Frequency characteristic |
5Hz - 300kHz |
| Input sensitivity/impedance |
1.23V/20kohm |
| <Preamplifier part>
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| Circuit system |
Whole page direct DC servo circuitry
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| Input sensitivity/impedance |
Phono man month: 2.5mV / 47kohm
Phono MC (Low): 80 microvolts/ten ohm
Phono MC (High): 250 microvolts/100 ohm
compact disk, Tuner, AUX, Tape1, 2:150mV / 20kohm |
| An Output voltage/impedance |
Rec output: 150mV/100 ohms
Preamplifier
output: 1.23V/600 ohm |
| SN ratio |
Phono MM:90dB(-142dBV)
Phono MC (Low):
72dB/80 microvolts (-154dBV)
Phono MC (High): 82dB/250 microvolts (-154dBV)
compact disk, Tuner, AUX, Tape1, 2:110dB (-126dBV) |
| RIAA deflection |
It is 10Hz - 100 kHz . less than ±0.2dB. |
| Phono maximum permissible input |
MM:300mV |
| Attenuator |
0 -10dB-20dB-30dB |
| Subsonic Filter |
15Hz (-3dB, 6 dB/oct) |
| Input/output phase |
Inphase |
| <Synthesis>
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| Power circuit scheme |
Stage independent shunt-regulator scheme +
reserve power source |
| Power consumption |
230W |
| Dimensions |
Width 430x height 150x depth of 430mm
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| Weight |
20kg |
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