|89,800yen(around the 1980 time)
The Integrated Amplifier which carries a super equalizer in order to utilize the
engine performance of a cartridge.
Basic composition has 2 amplifier
composition of MC/MM super equalizer amplifier and non switching A power
amplifier, and is considered as the perfect direct-current composition which
does not use a coupling capacitor for a signal course from MC input terminal
even to SP output terminal in addition to this simple composition.
perfect Capacitor-Less composition has realized the direct direct-current servo
system of DENON by carrying in an equalizer and both the amplifier of power,
shut out direct-current drift and has realized original sound quality of
direct-current composition amplifier.
In order to aim at correspondence
to the cartridge in which a broadband play is possible, the super equalizer is
carried in the equalizer part.
Composition consists of the NF form
direct-current amplifier and CR form equalizing filter by newly developed low
noise dual FET, and the first rank serves as parallel differential amplification
of dual FET of a direct direct-current servo system.
This has gained the high gain which is overly equal to the head amplifier
only for MC in addition to wide-range-izing. Moreover, MC cartridge of
a low output is also supported.
Moreover, the dual listening mechanism of a cartridge is carried and not
only change use of MC/MM but the comparison audition of two MC or two MM
can be operated with the push button of the front panel.
Direct direct-current servo
system high gain non switching A power amplifier is carried in the power
Composition is the low impedance buffer amplifier by a first
rank low noise FET parallel differential +IC high-speed operation (operation)
amplifier,It is a driver stage of a 3 steps of differential current mirror, and
an output stage of the high-speed power transistor 2 parallel push pull, and the
direct direct-current servo is applied to the first rank of buffer amplifier
from the output terminal of power amplifier at overalls. This is aiming at the
characteristic improvement of amplifier, such as Sadamu a high speed, high gain
and Takayasu, and a low distortion.
Moreover, while carrying the high speed
thermal feedback circuit in the zero crossing linear bias circuit original with
DENON and banishing switching distortion which is a merit of non switching in a
bias circuit, high operational stability is realized.
control is carried in the tone circuit.
It consisted of only passive devices
required for tone control, and the distortion of the tone circuit itself and the
problem of S/N are solved by not giving an amplifying function.
flux, the large-sized toroidal transformer which thought the rate of voltage
fluctuation as important, and a 44,000-micro F block capacitor are carried in
the power-source part.
This power-source part has been arranged at the
center of the power amplifier part of right-and-left independence, and has
adopted the layout of the power current pure radiation construction system which
is a curtate distance about wiring and makes L/Rch the equal distance.
Functions, such as a direct couple switch, a Rec out off function, an
effective equalizer Subsonic Filter only at the time of a record play, and
loudness control, are carried.
|<Power amplifier part (Tuner in->SP
|Output power (both channel drive, a sine wave continuation output, 20Hz
|THD (20Hz - 20kHz, Output-power-3dB)
||0.005% or less
|Cross modulation distortion (an equivalent
for 60Hz:7kHz=4:1 and an Output power)
||0.008% or less
|Output bandwidth (IHF, both ch(es) drive)
||5Hz - 400kHz (THD0.035%)
|Frequency response (at the time of 1W
||1Hz-400kHz+0 -3 dB
|Output load impedance (1kHz)
||AorB: 4ohms - 16ohms
|<Preamplifier part (Input
sensitivity/impedance is removed and it is Phono in->Rec out)>
||Phono MM: 2.5mV/50kohm
2:0.125 mV/100 ohms
Tuner, AUX, Tape:150mV/40kohm
|The maximum except take-off/Output power
|RIAA deflection (MM, MC)
|THD (at the time of 1kHz and 9V output)
||0.001% or less
|Signal to noise ratio (IHF-A, input short
||Phono MM: 90dB (at the time of a 2.5mV
Phono MC: 73dB (at the time of a 0.25mV input)
Tuner, AUX, Tape:
||Bass: ±8dB (100Hz)
Treble: ±8dB (10kHz)
||18Hz, 6 dB/oct
||100Hz : +7dB, 10kHz : +6dB
|Power supply voltage
|Power consumption (Electrical Appliance and
Material Control Law)
||Width 434x height 132x depth of 407mm