|ONKYO Integra H-1E
|120,000yen(around the 1994 time)
MC head amplifier which aimed at the improvement in
an S/N ratio taking advantage of the frequency characteristic of the head
amplifier no one but of an electronic circuitry, or the merit of a distortion.
In order to improve an S/N ratio, the source feedback type amplifying
circuit is adopted.
Since the equivalent noise resistor of an input stage is 1/2 compared with the common differential amplifier, the source feedback type amplifying circuit can aim at the improvement in the S/N ratio in head amplifier.
Furthermore, a slew rate becomes high by using this circuitry, and the wide
band play is enabled.
In order to employ the low-noise property of head
amplifier in a power source efficiently, the newly developed SEPP (single ended
push pull) power source excellent in noise performance is carried in it.
the push-pull operation, the linearity of the impedance to an output current
variation has been improved, and the high-speed responsibility is realized.
Moreover, the responsibility over the incrementation orientation and the
falloff orientation of an electric current becomes symmetrical, and the
variation of supply voltage can be reduced.
The equalizer amplifier is
using NF type which has a track record with separate amplifier, and also has
acquired the property excellent in adopting the high precision component partses
selected carefully thoroughly.
Moreover, DC servo circuitry is carried, a
coupling capacitor is abolished, and the purity of sound is raised.
power-source part is taken as the twin power source which carries independently
the LASER transformer of the super-low leakage flux property of having
suppressed the leak, in the object for head amplifier, and equalizer amplifiers,
respectively so that the flux which leaks and comes out of a transformer may not
soil a music signal.
Moreover, the blue capacitor of the development number
923 which challenged the difficult problem which reconciles the opposite
requirements of obtaining a feeling of energy and a high resolution to a
capacitor, spent three years of years on the development, and was developed is
The all aluminum monocoque chassis of 9mm thickness is adopted
as a front panel part.
By preparing many ribs in an inside-and-outside side,
the rigid improvement in a chassis and the reduction of the unnecessary
vibration are aimed at, and also E. I. du Pont de Nemours Cau LeAnn who has
rigidity and vibration suppression nature is employed as the insulator
supporting a chassis.
In order to attain high-quality sound-ization thoroughly, the printed circuit
board with a high-quality sound film capacitor and a thickness of 70 micrometers
of a carbon resistor and a Copper foil is adopted.
Moreover, the PIN termination is using the rigid high brass shaving payment plating terminal, and an installment of the rear panel of this terminal uses right-and-left 1 pair as a two-point stop, and is fixing it to a rigid. This PIN termination sets a terminal space character on either side to 18mm, and enables the using of the very-thick PIN plug.
A muting circuit is a soft muting circuit which stopped the
unpleasant noise at the time of an operation, and the shunt type which does not
affect a tone quality is used for it.
||MC(Hi): 150microvolt/100 ohm
MC(Lo): 150microvolt/50 ohm
man-month: 3.0mV / 47kohm
(1kHz, 0.05% THD)
|An Output power/impedance
(20Hz - 20kHz, 3V Output)
|MC: 0.003% or less
man month: 0.0008% or
|S/N ratio (A-weighted)
||MC: 80dB (0.5mV input / input short-circuit)
man month: 88dB (5.0mV input / input short-circuit)
||±0.15dB (20Hz - 20kHz)
|Output muting attenuation
||65dB or more (Soft Muting)
|Power consumption (Electrical Appliance and
Material Control Law)
||Width 435x height 85x depth of 359mm