Harmonic Time
Alignment circuit topology
In the preamp and
power amp stages , open-loop gain is designed with a high cut-off point, and
local NFB (negative feedback) is used sparingly. This approach faithfully
preserves the phase relationship of the music signal and distortion components,
making distortion all but inaudible. Musical expression therefore is utterly
natural and transparent.
Line amplifier stage
with discrete components
The line amplifier
consists only of strictly selected high-quality parts. The open-loop gain
frequency response is designed to be flat, to bring out the full potwntial of
the Harmonic Time Alignment principle.
High current
capability
The power
transistors are amply dimensioned, yielding a peak current capability of 28
amperas (Amplifier 1) or 18 amperas (Amplifier 2). In addition, the large power
transformer and large filtering capacitors provide the necessary muscle to
drive even very low impedance speakers
with ease.
Multi-regulated
Power Supply
Separate rransformer
windings are provided for the control section and the audio signal circuitry,
to prevent interference between stages. The phono stage and the line amplifier
stage have dedicated locl power regulators which provide stable and clean current.
Isolated ground
principle
The phono stage and
the line amplifier stage employ Nakamichi's original isolated ground design.
This ensures that the ground potential always remains constant, resulting in
stable signal transmission.
System Remote
capability
The supplied remote
control unit can be used to operate not only the amplifier but also other
connected Nakamichi components.
Specifications
Power Section
Continuous Average
Output Power (both channels driven, 20-20,000 Hz, 0,1%T.H.D.):
80 watts per channel
into 8 Ω
130 watts per
channel into 4 Ω
Dynamic Output
Power:
180 watts per
channel into 4 Ω
270 watts per
channel into 2 Ω
Power
Bandwidth: 10 -50,000 Hz
Frequency
Response: 20 -20,000 Hz +0, -0,5 dB (5 -
80,000 Hz +0, -3 dB)
Signal-to-Noise
Ratio (A weighted, Input Shorted):
better than 105 dB re rated power
(better than 83 dB , IHF-A 202)
Total Harmonic
Distortion (8 Ω , rated power, 20 - 20,000 Hz) : 0,1% or less
Headphone Output
(into 40 Ω ): 187 mW
Output Current
Capability: 28 A peak per channel
Preamplifier Section
input
Sensitivity/Impedance:
Phono MC : 0,125 mv/100 Ω
Phono MM : 2,5 mv/47 k Ω
CD, Tuner, Tape, Aux
: 150 mv/20 kohm
Maximum Input Level
(1 kHz):
Phono MC : 9 mv
Phono MM : 180 mv
Output
Level/Impedance:
Rec Out : 150 mv/1,5 k Ω
Total Harmonic
Distortion (1 kHz, Rec. Out, 1 V Output Level):
Phono MC : 0,1% or less
Phono MM : 0,008% or less
RIAA Deviation
Phono MC /MM : 30 - 20,000 Hz ±0,5 dB
Signal-to-Noise
Ratio
Phono MC : 70 dB
Phono MM : 82 dB
Tone Controls
Bass : 20 Hz ±10 dB
Treble : 20 kHz ±10 dB
General
Power Source: 120, 230, 240 or 110, 120, 220, 240 V AC ,
50/60 Hz
Power
Consumption: 600 W max.
Dimensions (W x H x
D): 430 x 125 x 360 mm
Weight: 15,0 kg
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