||350,000yen(October, 1995 release)
Tube pre-main stereo amplifier produced commercially
in commemoration of the 70th anniversary of foundation.
The title of 38 of
the long-term seller covering all the past 7 model is inherited.
Williamson circuitry is adopted as a power amplifier part.
signal was formed by little PK splitting of the tone-quality failure,
output-tube EL34 (6CA7) was operated by the push pull, and total NFB is limited
to a few.
Output-tube EL34 has selected carefully and adopted the thing of Golden
Dragon specially produced with the line. Furthermore, "12AU7"
is used for the first rank. It is the orthodox element and circuitry of
using "2B H7" for the driver stage.
OY type of the tradition which determined the
validation of the Lux as a transformer manufacture is adopted as the output
transformer which has great influence on a tone quality.
material is used, it unites with a specification based on a splitting volume
original with OY, and the new design is performed. In addition to the
outstanding tone quality with little phase rotation, this has gained low-pass
and the gentle response extended to the full audio frequency band.
leakage flux is completely eliminated because the main unit of a transformer
gives filling by fixed material on a severe shielding and also dedicates it to
The custom-made volume control which has improved distortion
in the Puri part and aimed at the improvement in a tone quality on Hearing
impression is carried.
As for the tone control circuit, 12 AU of thermionic
tubes consist of 7. The more natural correction by making upper register and a
bass region become independent is possible in this circuitry.
A prejudice is put into practice also among a basic part, and the compound
electrolytic capacitor, the highly precise mold resistor, and the circuit
board which were newly improved are filled with consideration of a tone
quality, such as using the double-sided type made from glass epoxy.
The source selection can change a line input and a tapes input/output
Moreover, if 3 head deck is used, the simultaneous monitor at
the time of a sound recording can also be performed with a monitor switchpoint.
Furthermore, it is also possible to jump over a monitor switchpoint and a
balance volume and to send the signal of the source in the purer status with a
line straight switchpoint.
In order to correspond to compact disk, DAT,
etc., four line inputs are carried.
Moreover, the highly precise phone
equalizer is also built in.
While certainly fixing the thermionic tube, in order to eliminate the influence
of an oscillation from the outside, moderate weight was given to the chassis
and the rigid high structure is completed.
Furthermore, a high-density material is used for a
side panel, and consideration is made by the measure against a vibration
suppression, such as constituting from a material in which the oscillation modes
Moreover, the knob of volume control or a multiple contact switch is
what combined blast finish and a hairline manipulation.
AC inlet is
adopted as a power cable.
Moreover, a polar mandatory can also be performed
now by adoption of a line phase sensor.
||Tube pre-main stereo amplifier
Phono man month: 2.5mV/47kohm
||0.5% (6 ohms, 1 kH/NFB6dB)
||20Hz - 20000Hz, and +0 -0.5 dB
||±15dB (the maximum variation)
||Line straight switchpoint
REC OUT switchpoint
Tone control (Bass/Treble)
equalizer (man month)
||190W (based on a convention of Electrical
Appliance and Material Control Law)
||Width 430x height 209x depth of 387mm