|Marantz PM-14SA ver.2
The Integrated Amplifier which raised completeness
by supplying the technology acquired by SC-7S1/MA-9S1 to PM-14SA.
large review of the power circuit is carried out.
The cobalt capacitor of a low foil scaling factor / low loss of what was
adopted with separate amplifier, and an affiliated sequence is adopted
as the electrolytic capacitor of a power-source block. Moreover, the efficiency
ratio has adopted the super ring-core toroidal transformer of good 450VA
with little leakage magnetic flux as a power transformer. Furthermore,
the feed line was shortened as much as possible, and the shake of potential
is eliminated by improving grand potential completely.
The schottky-barrier diode used also with separate amplifier is extensively adopted as each rectifier circuit, and
low-noise-ization is attained as it is efficient.
The high precision
low-noise metal film resistor and polypropylene film capacitor which the current
feedback type circuitry adopted also as PM-14SA is adopted as the preamplifier
part, and were adopted as separate amplifier are adopted. This has realized
low-noise-izing and a high slew rate.
As circuitry, by the first rank,
voltage amplification module adjustable HDAM which can perform DC offset
coordination is adopted, impedance conversion is performed in an FET buffer, and
a power-source feedback is poured in here. By the SEPP+ diamond output circuit
by a bipolar transistor, the subsequent stage has secured drive capacity
sufficient by having a stream composition like power amplifier with a high
current amplification factor at high speed.
The conventional current
feedback type circuitry is adopted also as a power amplifier part, and parts
used with separate amplifier, such as a film capacitor and a resistor, are adopted. The phase compensation could be made light by lowering a feedback
impedance, and high speed amplifier is realized. This circuitry can remove the
choke coil of the harmful output unit on a tone quality, securing the stability
to a load variation, and has advantageous composition also in S/N.
is connected through the I/V translation part by a current mirror circuitry
after impedance conversion to the power amplification part of three-step
Darlington which earns a direct-current amplification factor from the first rank
in which high speed adjustable HDAM carries out a voltage amplification. The
output stage has single push pull composition by the method bipolar transistor
of a multiemitter of Pc=200W.
It is the first rank's applying a
direct-current feedback 100%, and performing an offset coordination of
adjustable HDAM, and it is possible to eliminate DC servo by the active element
which poses a problem by S/N etc.
The power transistor is arranged by the
heat sink through the high copper cover of vibration proof / the shielding
The termination with a large pitch which it began to shave is adopted as
compact-disk input terminal.
thing made from German WBT is adopted as a speaker terminal.
input/output terminal and changeover switch which can carry out the independent
using of a preamplifier part and the power amplifier part are carried.
Moreover, in consideration of the using of an active Woofer, the pre out
is designed so that it may be outputted also in the time of integrated.
possibilities to the by amplifier interconnection have been obtained by setting
up the gain of a power amplifier part similarly to SM-17SA ver.2.
high-density zinc die-casting chassis to which the copper plating was given is
The phone equalizer amplifier is carried.
Naked insulator is adopted.
The OFC power cable of the conductor cross section 2mm2 is attached.
Wireless remote control is
|THD (20Hz - 20kHz, both channel simultaneous drive, 8ohms)
|Cross modulation distortion (SMPTE)
|Output bandwidth (an 8-ohm load intensity,
||10Hz - 50kHz
|Frequency characteristic (compact disk,
||5Hz-100kHz+0 -1 dB
|Dumping factor (8 ohms, 20Hz - 20kHz)
||Phono MC: 270 microvolts/100 ohms
man month: 2.4mV/47kohm
High SFT Level: 250mV/20kohm
|An Output voltage/impedance
||Pre out: 2.0V/250 ohm
|Phono maximum permissible input (1kHz)
|RIAA deflection (20Hz - 20kHz)
|S/N (an IHF A network, input short-circuit)
||Bass: ±8dB (100Hz)
Treble: ±8dB (10kHz)
||Line: Four lines
Balance: One line
Tapes system: Two lines
Phone: One line
Main in: One line
||Pre out: One line
Tapes system: Two
Speaker: Two lines
Headphone: One line
|Power consumption (Electrical Appliance and
Material Safety Law)
|The maximum Dimensions
||Width 458x height 166x depth of 464mm
||Wireless remote control