Audio Database

The pictorial image of Integra H-1E

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.
By 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.

The 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 carried.

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.

A Insulator

Rating of a mode
Form Phone preamplifier
Input sensitivity/impedance MC(Hi): 150microvolt/100 ohm
MC(Lo): 150microvolt/50 ohm
man-month: 3.0mV / 47kohm
Allowable input
(1kHz, 0.05% THD)
An Output power/impedance 300mV/200 ohms
Maximum output 12V
(20Hz - 20kHz, 3V Output)
MC: 0.003% or less
man month: 0.0008% or less
S/N ratio (A-weighted) MC: 80dB (0.5mV input / input short-circuit)
man month: 88dB (5.0mV input / input short-circuit)
RIAA deflection ±0.15dB (20Hz - 20kHz)
Output muting attenuation 65dB or more (Soft Muting)
Supply voltage AC100V, 50Hz/60Hz
Power consumption (Electrical Appliance and Material Control Law) 18W
Dimensions Width 435x height 85x depth of 359mm
Weight 6.6kg