Description
Features/NotesMaintained by a designated contractor in June 2023. Comes with a general-purpose power cable. There are scratches, dirt, and rust.Control amplifier improved based on C-200 and C-200SCompatible with MC cartridges for the first time, equipped with an MC head amplifier Frequency response: 20Hz to 20kHz +0 -0.2dB????????????????????????????????????????A stereo control amplifier based on the C-200 and C-200S, which has been significantly improved by introducing the latest technology.A cascode bootstrap push-pull differential input method is adopted based on the all-amplification-stage push-pull method. By cascode bootstrapping, a large gain is obtained and high frequency characteristics are improved, and at the same time, deterioration of distortion due to increase in input impedance is also improved.This circuit is used for an equalizer amplifier and a high level tone control amplifier.A DC servo system is adopted as an equalizer amplifier and a high level tone control amplifier, and the MM disk input and output are completely connected directly.The DC servo amplifier uses an IC, and the output of the IC does not directly control the signal system of the differential input amplifier, but instead uses a method of controlling the base current of the constant current source.This servo circuit can minimize the influence of servo system noise on the signal system and has excellent DC drift control ability. Therefore, excellent effects can be obtained even when used in an equalizer amplifier with high low-frequency gain.The head amplifier section consists of a differential push-pull input and a RET pure complementary output circuit. In addition, the input section, which affects sound quality, is a direct connection method that does not use a capacitor.A multiple power supply system is adopted in which independent constant voltage power supplies using RET and IC are placed in a total of six locations on each side of the head amplifier, equalizer amplifier, and high level amplifier.Each of these is placed close to the circuit and maintains low impedance over a wide band, reducing interference between each unit.The headphone amplifier section uses a DC configuration class A pure complementary direct-connection dedicated amplifier.A printed circuit motherboard method is used to connect unit amplifiers, power supply sections, and some functions.The glass epoxy motherboard mounts sockets for plugging in each unit amplifier, power transformer and rectifier, filter capacitors, and front panel push switches.Each part is connected by a printed circuit conductor path, eliminating variations in characteristics due to uneven wiring that often occurs with wire wiring, and achieving uniform performance.The tone control section employs a 2dB step system using left and right independent 11-contact rotary switches, which has been adopted since the C-200.A turnover selector switch is also provided, and an ON-OFF switch for canceling tone control is also provided.Equipped with a loudness compensator that corrects the hearing sensation during low volume playback and adjusts the energy balance.Two types of curves can be selected depending on the playback level and listening room characteristics.It is equipped with a subsonic filter and a high filter.It is equipped with functions such as a -20dB attenuator switch, a mode switch using a 5-contact rotary switch, a disk input impedance selection switch, and an output ON-OFF switch.Model Stereo Control CenterFrequency characteristics (new IHF) highlevel: 20Hz to 20kHz +0 -0.2dBdisc:20Hz?20kHz ±0.2dBTotal harmonic distortion rate (new IHF) 0.005% or less (20Hz to 20kHz)Input sensitivity/impedance(Rated output/New IHF0.5V output) disc1, discFront MM:2.0mV/0.5mV/100, 47k, 82k, 150k?(head amp off)disc2 MM:2.0mV/0.5mV/47k?(head amp off)disc MC:0.1mV/0.025mV/100?(head amp on)tuner, aux, tape play: 126mV/31.5mV/47k?Rated output/impedance output:2.0V/2?tape rec:126mV/200? (at the time of disc input)Headphone terminal output impedance: 0.3?Output: 0.25W (8?, 1kHz, distortion rate 0.01%)S/Ndisc(head amp off): 85dB (rated input, input short, A correction)82dB (new IHF)disc(head amp on): 72dB (rated input, input short, A correction)74dB (new IHF)tuner, aux, tape play: 110dB (rated input, input short, A correction)88dB (new IHF)Input conversion noise disc(head amp off):-139dBVdisc(head amp on):-152dBVtuner, aux, tape play: -128dBVMaximum output level 10V (distortion rate 0.005% or less, 20Hz to 20kHz)disc maximum input(1kHz, distortion rate 0.005% or less) head amp off: 400mVrmshead amp on:20mVrmsMinimum load impedance output:1k?tape rec:10k?gaintuner, aux, tape play ? tape rec:0dBoutput:24dBdisc(head amp off)? tape rec:36dBoutput:60dB(head amp on:+26dB)Tone control: Step type with 11 contact rotary switchTurnover frequency Bass: 200Hz, 500HzTreble: 2kHz, 7kHzBass 500Hz: ±10dB (100Hz), 2dB steps200Hz: ±10dB (35Hz), 2dB stepsTreble 2kHz: ±10dB (10kHz), 2dB steps7kHz:±10dB(35kHz), 2dB stepsloudness compensator(Volume -30dB) comp1:+3dB(100Hz)comp2:+10dB(100Hz),+5dB(20kHz)Filter Subsonic filter: 17Hz, -12dB/octHigh filter: 8kHz -12dB/octAttenuator -20dBSemiconductor used: Transistor: 102 piecesFET: 29 piecesIC: 11 piecesDiode: 50 piecesPower supply AC100V/117V/220V/240V, 50Hz/60HzPower consumption 80WExternal dimensions (including legs) Normal: Width 445 x Height 160 x Depth 373 mmWhen equipped with wood case: Width 466x Height 190x Depth 385mmWeight 13.4kgFor remote delivery areas, additional fees will be charged. 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