Marantz PM-88SE
?90,000 (1990 sale)
The pre- main amplifier which was developed as the special edition of PM-80.
"The basis of the amplifier on the basis of the idea, power source", has adopted toroidal trance to the power source section. Because regulation (current supply source ability) is good, also the natural frequencys are few, it is optimum as a trance of the amplifier.
Furthermore, the custom made bulk electrolytic condenser is loaded.
In addition, the speaker circuit and the power cord/code, furthermore the OFC line is used to the internal wiring material, the flow of smooth electric current is guaranteed.
Furthermore, the powerful noise killer element is loaded quite barely as the rectification noise measure which exerts influence on the sound quality even at the quantity, when rectifying the high frequency noise which it occurs is absorbed, the sound quality which does not have the turbidity is actualized.
As for the power amplifier section, Pc (collector loss) the power transistor of 100W is used with parallel push pull, profit is raised by the fact that circuit constitution is made three step Darlington connections.
In addition, with PM-88SE 20W/ch (8 Ω) pure A class expansion of output is adopted. With the AB class amplifying system which allots the plus side and negative side of the signal with the separate transistor, the case where the music signal from plus side changes on negative side of electrification of the transistor/cutoff the switching strain occurred instantaneously, but with A class expansion all ripple mark of the signal in order the う you wipe and to do with the same transistor, electrification/the cutoff like AB class expansion does not happen, holds down the occurrence of the switching strain.
In addition, when big power is necessary, also it is possible to change to AB class expansion.
The sealed board of OFC which locks the power transistor decreases the unnecessary radiation which occurs from the transistor.
The フォノ equalizer section forms low noise FET and the low noise amplifier which combines one for audio IC, in order to transmit the signal of the small analog disk of level faithfully, administers very careful consideration.
In addition, influence of the curvature of the analog disk is held down by being attenuated the ultralow limits of 30Hz.
Attention is paid to the selection of the part finely in addition to this e.g., the electrolytic condenser of the silk separator, the paper polyester baseplate which is superior in damping characteristic is adopted to the printed circuit board in the coupling condenser.
The frame with adoption of side ･ die-cast, has protected each circuit from the vibration from inside and outside, with the other vibration-proof part the influence with the vibration is removed.
The chassis is plated processing the whole copper, the fact that high frequency jumps in the other circuit and the element prevents.
Furthermore, you hold down the amplifier itself vibration with the adoption of the 3mm thick vibration-proof top cover, have decreased also the vibration from outside.
Both volume and the selector, the knob of aluminum purity is used.
The influence with the fact that the volume shaft vibrates is largely decreased, the especially volume knob is not simply to install the knob of purity, volume itself is locked securely with the large-sized washer.
Input has equipped フォノ 1 system (MM/MC change), 4 system and tape input/output 3 system of the line.
In addition, 1 system also of the processor input/output terminal it equips.
2 systems of the banana plug corresponding terminal is equipped in the speaker terminal.
Rating of type System Stereo pre- main amplifier
Rated output (20Hz - 20kHz and both ch drive) At the time of class AB: 100W + 100W (8 Ω)
120W + 120W (6 Ω)
140W + 140W (4 Ω)
At the time of class A: 20W + 20W (8 Ω)
Dynamic power At the time of class AB: 170W + 170W (6 Ω)
220W + 220W (4 Ω)
340W + 340W (2 Ω)
Total height harmonic wave distortion factor (20Hz - 20kHz, 8 Ω loads) 0.008%
Cross modulation distortion factor (SMPTE) 0.008%
Output bandwidth (8 Ω loads and THD 0.03%) 10Hz - 50kHz
Frequency characteristic (CD source direct) 10Hz - 100kHz, +0 -3dB
Damping factor (8 Ω loads, 20Hz - 10kHz) 180
Input sensitivity/input impedance Phono MC: 250 μ V/100 Ω
Phono MM: 2.5mV/47k Ω
High Level: 150mV/33k Ω
Phono maximum permissible input (1kHz) MC: 16mV
MM: 160mV
RIAA deviation (20Hz - 20kHz) ?0.2dB
Signal-noise ratio (A network) Phono MC: 75dB
Phono MM: 85dB
High Level: 107dB
Power supply voltage AV100V and 50Hz/60Hz
Electric power consumption 220W (electric supplies control method)
External size Width 454? height 165? depth 380mm
Weight 17.5kg
.JPG)
