|1,100,000 yen(June, 1999 release)
Stereo power amplifier which inherited the design technology of M-2000 or A-50V,
supplied the element of the highest grade, and applied the polish to sound
The high power transistor of the collector loss 130W
and collector current 15A is adopted as the output element of P-1000. This
element is excellent in many characteristics, such as a frequency response, a
current gain linearity, and switching, and super-low impedance-ization is
attained with constituting this element from an 11-parallel push pull.
elements are attached on the huge heat sink by aluminum die-casting, efficient
heat dissipation processing is carried out, and the Oide power power amplifier
even with 1-ohm linear super-low impedance load is realized.
feedback type magnification circuit which returns an output signal in the form
of current is adopted as circuit composition.
In this circuit, the impedance
of the input terminal which becomes the return side is lowered first, and
current is detected. I-V (current-voltage) conversion of the current is carried
out with a transformer impedance amplifier, and the output signal is made.
In order that it may be hard to generate phase rotation since the impedance
of a return input portion is very low, and there may almost be no necessity for
phase compensation, many characteristics have been sharply improved by a little
NFB(s), it excelled in dynamic characteristics, such as a standup, and the
natural energy response has been obtained also in respect of sound quality.
The use as monophonic power amplifier of bridge connection with the
changeover switch carried in P-1000 is possible.
Bridge connection is a
system which inputs the same signal as two amplifier with which polarity
differs, and connects a speaker to the output end of both amplifier, and can
supply high power.
The printed circuit board by a Teflon base is adopted
as an electric power magnification circuit.
Teflon has the features, like
what has a low dielectric constant, and very little (low loss) leak current
between the patterns formed on the printed circuit board, heat resistance, and
the high frequency characteristic are excellent.
By use of this Teflon base,
since the dielectric constant is low, the propagation velocity of a signal
becomes quick, and since there is little path loss, purer transmission of a
signal is possible.
Copper with high purity is used for the parts which
signals, such as a grounded plate, a capacitor terminal, an input terminal, a
speaker terminal, etc. in which a printed board Copper-foil side and ripple
current flow, pass. In P-1000, improvement in sound quality put into practice by
performing plate-ization with gold on this is aimed at.
The large-sized toroidal transformer of the large power capacity of about
1.5 kVA is adopted as a power transformer. Furthermore, it excels in heat
conduction, and using the high load material of the vibrationproofing effect,
it adheres to the unresonated aluminum case of efficient heat dissipation
structure, and the influence on the exterior is intercepted.
Impedance of a toroidal
transformer is very low in order to coil thick copper wire around a
doughnut-like core, and it is small, and conversion efficiency is very high. In
particular, in P-1000, the super ring type is adopted, the section of an iron
core can also roll a coil in a circle closely circularly, and since adhesion
nature is good, a loss can lessen the leakage flux at the time of load, and a
roar few,Furthermore, iron loss and in rushes current are small made by making
the cross-sectional area of an iron core small, and enlarging the rate of a bulk
density of copper wire.
Moreover, two large scale types of 56,000 micro F
are carried in the aluminum electrolytic capacitor.
it can respond also
to a very-thick speaker cable -- the large-sized speaker terminal is overly
A brass Naked is used for the material of a terminal, it begins to
delete, the golden plate is formed, and the mould cap of the insulated purpose
is put from on the.
The balance connection which cannot receive visitor
guidance noise easily is carried.
In balance transmission, in order that the
noise ingredient generated in a cable may go into two poles at this phase, if
compounded, only a noise ingredient will disappear and the good signal
transmission of it becomes possible.
The analog type large-sized power
meter which can carry out the Direct reading of the large power range by
logarithm compression is carried.
Operation of meter and on/off of lighting
||Stereo power amplifier
|Rated continuation average output
|At the time of stereo specification
(both channel operation) :
|1,000 W/ch (it restricts to 1 ohm and a
500 W/ch (2ohms)
250 W/ch (4ohms)
125 W/ch (8ohms)
|At the time of mono specification
(bridge connection) :
|2,000W (it restricts to 2 ohms and a music
|At the time of stereo specification (both
ch(es) operation) :
|At the time of mono specification (bridge
||20Hz-20kHz+0 -0.2 dB (at the time of a rated
continuation average output)
0.5Hz-150kHz+0 -3.0dB (at the time of 1W
||28.0dB (at the time of stereo/mono
||At the time of stereo specification: 2ohms -
At the time of mono specification: 4ohms - 16ohms
* Restrict to a
music signal and stereo1ohm and mono2ohm load are possible.
||300 (at the time of stereo/mono
|Input sensitivity (8-ohm load)
|At the time of stereo specification :
||1.26V (at the time of a rated continuation
0.11V (at the time of 1W output)
|At the time of mono specification :
||2.52V (at the time of a rated continuation
0.11V (at the time of 1W output)
||Balance input: 40kohm
(A compensation, input short-circuit)
|114dB (at the time of a rated continuation
117dB (at the time of a clipping output)
|Power output meter
||A logarithm compression type, with a display
- 60dB - +3dB, and the output Direct-reading
scale of 2-ohm load
||148W (at the time of no inputting)
1,070W (Electrical Appliance and Material Control Law)
635W (at the time
of an 8-ohm load Output power)
|The maximum Dimensions
||Width 475x height 258x depth of 545mm