|Marantz Model 1180
||135,000yen(around the 1977 time)
Low TIM (the Tran Gent intermodulation distortion) and the Integrated Amplifier
which pursued the TIM.
The power part
considered it as the 3 steps of pure complimentary OCL and parallel push pull
darlington circuit by DC stream composition of Marantz tradition, and the
low-noise element of a Marantz requests for price quotations is used for it.
Furthermore, the differential-amplification cascode bootstrap circuit by
low-noise specification FET is adopted as this power amplifier first rank, and
the temperature drift and the time drift which becomes a problem with DC
amplifier are suppressed to the relative minimum.
It has succeeded in
acquiring and adding the phase response and transmission capability which were
excellent by this over the large band from super-low-pass one to a super-high
region, eliminating the phase distortion in super-low-pass one, pulling up a
nakedness property, and practicing thought of Low TIM actually.
the ESP circuitry adopted by P510M.
This ESP circuitry detects momentarily
DC occurrence by the excessive output current and voltage, and outgoing end,
restricts the signal to a driver transistor to a safe value, and is protecting
it from an over drive or short-circuit.
And it protects continuously,
without also detecting a frequency and time by a differential at the moment, and
interrupting a special NetWare program.
Furthermore, it has the relay which
also combined the delay circuit (4 seconds) which prevents the shocking noise by
the power source ON, and a speaker separates automatically in case of the outage
of a transistor.
By actual special-NetWare-program play, Tran Gent's
peek in the sources, such as large direct cutting of a dynamic range, may exceed
mean-value level of +10dB - +20dB (ten to 100 times).
It had the peek
indicator which answers momentarily to such a peek, level adjustment was made
easy, and the clip block is prevented.
Equalizer amplifier serves as a 3
steps of first rank differentials hardwired-connection differential circuitry
with 5Tr stream compositions of the difference input amplifier by a
made-to-order low-noise element, buffer amplifier, and low electric-current
load-intensity first class amplifier.
The loudness contour is equipped and low and the quantity region at the
time of a small sound volume can be finely tuned in the amount of corrections
by the Fletcher Munson curve to ten steps according to a sound volume according
to the property of a human being's ear.
The try tone control organization original with the Marantz in
which a MID range control is possible is equipped.
It can copy to the
deck from a tape deck, and a differential is individually possible for the Tape
Copy organization which can also be monitored in other sources in an independent
The bessel type filter which was excellent in the roll-off
characteristics is adopted.
9kHz and the roll-off curve in which 18dB / oct
is steep at 15Hz were realized, and it has succeeded in reducing phase
The tone circuitry was jumped and the tone defeat which sets
the frequency characteristic as a flat is equipped.
The DC/AC amplifier
change-over switch is carried.
Wooden cabinets are options.
||Stereo Integrated Amplifier
(20Hz - 20kHz, both channel drive)
|Frequency characteristic (20Hz - 20kHz)
||+ 0, -0.2dB
|Cross modulation distortion
||Main-amplifier input: 1.5V/30kohm
Phone man-month: 1.8mV/47kohm
|An Output power/impedance
||Pre Out: 1.5V/200 ohm
|RIAA deflection (20Hz - 20kHz)
|Tone control property
||Low: 15Hz, 18dB / oct
High: 9kHz, 18dB /
||240W (Electrical Appliance and Material
||Width 416x height 146x depth of 316mm
||Standard walnut cabinet WC-110 (7,000yen)
Standard mahogany cabinet WC-110N (12,000yen)