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(1990)

"Music, talk the romance. "
"Atmosphere of music, we would like to convey even to after effect.... "

Stereo & pre-amp
PRA-2000RG
Standard price: 330,000 Yen (classified by tax)


1. Balance output equipment of new system "INVERTED S BALANCE circuit" adoption

It is transmission system of the ideal to which balance transmission cancels the noise which is induced in the transmission cable, does not receive the influence of imported noise. As for this balance output amplifier it is general to form with the operational amplifier by IC, but when it is this method, it cannot guarantee sufficient efficiency at such as the dynamic range and Signal-noise ratio.
With DENON, in order to pull out without leaving the characteristic of balance transmission system, developing the INVERTED? leek ALANCE circuit anew. As amplifying element everything is made discrete constitution of the high performance and high quality part use, power supply voltage is converted approximately 3 times that of system (±47V) to high tension until recently, low, with the distortion removal circuitry which furthermore develops DENON individual non return technology, actualizing distortion factor and high Signal-noise ratio. The sufficient dynamic range sharp startup quality was guaranteed.

2. In output step in all FET type advanced flat amplifier unbalanced output step of MOS FET adoption MOS FET adoption

As for FET, time lag of signal transmission being little extremely, input impedance is very large, it meaning that the odd number next distortion factor does not occur, it has ideal quality as a transmission amplifying element of the analog signal. The knitting machine, pursued, the ideal of the amplifier of digital age, such as CD, DAT and BS formed the flat amplifier with FET.
As the first level the pole makes differential amplification of noise FET low, goes hand in hand with refuse coat bootstrap system, decreases the feedback between input/output to the extremity, linearity was improved substantially. In addition, MOS FET (Pc30W) the pre- driver step of adoption improves linearity substantially the similar cascode bootstrap to the first level, with P-P system, low assures the improvement straightening high pass quality. MOS FET (Pc30W) the end step of adoption consists of the source follower circuit, is compatible load drive quality with high input impedance low, obtains the transmission characteristic which is superior as a flat amplifier of digital age.

3. Balanced lance adoption of wide band LC-OFC coil (CD-2 balance input)

Because it corresponds to the balance output which is equipped in the high-class CD player et. al., balance input transformer of the wide band LC-OFC coil was adopted for CD-2 balance input. Because of this, quite being smooth unlike the operational amplifier system due to IC, wide band you obtain quality.

4. The LC- p type power circuit which uses the large-sized coil which cuts power source noise

In order to cut off power source noise, the knitting machine adopted the LC- p type power circuit by the large-sized choke coil.

5. The constant voltage power supply classified by unit which removes mutual interference

The equalizer - pure electric current was supplied to the amplifier, the flat amplifier, the balance amplifier and the control circuit with shortest course, the constant voltage power supply which removes the interference between each unit was loaded classified by unit.

Advanced high quality PHONO equalizer of 6.MOS POWER FET adoption and maximum permissible input 500mV/1kHz - amplifier

Up-to-date technology was thrown to also analog disk playback, polishing was bet on degree of completion as a pre-amp. As for the knitting machine, as the maximum permissible input 500mV/1kHz which corresponds to wide ?????????? playback is acquired, MOS POWER FET (Pc30W) you adopted for the output step, assured the high acceleration of signal transmission, improved load drive quality low.

7.PHONO input MM/MC 2 systematic equipment. In MC input LC-OFC trance adoption

As for MC input, like the recent high-class MC cartridge because it corresponds to the cartridge of very low power output voltage, boosting ratio 1: MC trance of the LC-OFC coil of 20 was adopted.

8. With "EQ OFF switch" equipment the equalizer - amplifier complete separation (power source OFF) the design

When using PHONO input, the circuit and power source were cut off completely the equalizer - by the amplifier OFF switch, cancelled influence to such as CD playback.

9. The high performance it is low in the all stage input circuits noise FET

10 Advanced balance input/output terminal, RCA pin-jack adoption

The high accuracy 4 connected large-sized (40 types) of 11.L and R each 2 connected parallel uses volume

The high accuracy 4 connected large-sized (40 types) of L and R each 2 connected parallel uses volume is used to main volume. Contact resistance of the resistor and the brush is decreased, sound quality deterioration quite is made small.

12. Using ????? for the volume knob. The Takasina rank due to real wood mirror surface finish cabinet adoption design

????? is the lumber which has been used for the pipe. In order the pipe while using over long time, to keep adapting to the hand, when touching, ????? whose touch is good was adopted for also the volume knob which long time is handled. In addition, the cabinet the tastefulness due to multilayer coding made the real wood mirror surface finish which overflows, the Takasina rank which adopts the trap door collected with design.

13 In addition merit

  • Adopting copper plating to the high rigid chassis and the front chassis of the sintered metal based large-sized weight class foot and plank material use
  • Adopting treble quality part such as high quality resistant for sound and electrolytic condenser and film condenser
  • Adopting the epoxy based glass compound baseplate which in the printed circuit board is superior in strength, electric efficiency and resistance swing characteristic
  • Input change the electronic switch and the software touch operation by advanced relay. The pre-setting switch attaching which can appoint the input at the time of power source ON


Specification standard

* Equalizer - amplifier section (PHONO IN - REC OUT)

  • Input sensitivity/input impedance
    • PHONO-MC 125 µ V/40 O
    • PHONO-MM 2.5mV/47k O
  • Maximum permissible input
    • PHONO-MC 25mV/1kHz
    • PHONO-MM 500mV/1kHz
  • Installed capacity/rated output
    • 30V/150mV
  • Total height harmonic wave distortion factor
    • PHONO-MC - REC OUT 0.01% (10V/1kHz)
    • PHONO-MM - REC OUT 0.005% (10V/20Hz - 20kHz)
    • CD-1 - PRE OUT-1 0.005% (10V/20Hz - 20kHz)
    • CD-2 - PRE OUT-2 0.005% (10V/1kHz)
  • RIAA deviation
    • PHONO-MC 30Hz - 20kHz ±0.3dB
    • PHONO-MM 20Hz - 20kHz ±0.2dB
  • Signal-noise ratio (IHF-A)
    • PHONO-MC 80dB (at 250 µ V Input)
    • PHONO-MM 90dB (at 5mV Input)
  • SUBSONIC FILTER
    • 16Hz 6dB/oct

* High level amplifier section

  • Input sensitivity/input impedance
    • CD-1, TUNER, AUX-1 and AUX-2 150mV/20k O
    • CD-2 (BALANCED) 150mV/2k O
  • Installed capacity/rated output
    • 10V/2V
  • Total height harmonic wave distortion factor
    • CD-1, TUNER, AUX-1 and AUX-2 0.005%/10V (20Hz - 20kHz)
    • CD-2 (BALANCED) 0.005%/1V (1kHz)
  • Frequency characteristic
    • CD-1, TUNER, AUX-1 and AUX-2 1Hz - 100kHz (+0/-3dB)
    • CD-2 (BALANCED) 20Hz - 50kHz (+0/-3dB)
  • Signal-noise ratio
    • 105dB (I. H.F.A)
  • Muting
    • - XXINF DB (LED blinking indication)
  • TONE CONTROL
    • BASS ±10dB/100Hz
    • TREBLE ±10dB/10kHz

* Synthesis

  • Power source electrical outlet
    • Non-linkage 1 (700W)
  • Power source
    • AC100V 50Hz/60Hz
  • Electric power consumption
    • 29W (it depends on electric supplies control method)
  • Size
    • (W) 476 (H) 144 (D) 388mm (height of the knobs and the foot is included)
  • Weight
    • 16.5kg




AllegroSound (Est.1973)
Los Angeles, California USA
Rick@AllegroSound.com
FOR SALE / TRADE
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Rick@AllegroSound.com

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323.960.5014

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