Description
Description of itemThis is a DC integrated amplifier equipped with a diamond differential circuit based on the essence of an audio amplifier, which is music reproduction.It has a design that further improves the DC amplifier section, and the equalizer section, flat amplifier section, and power amplifier section are all DC amplifier configurations with excellent dynamic characteristics.Moreover, the inputs of all block stages are all FET inputs and push-pull input circuits, and the direct couple system eliminates the input capacitors of all block stages.This eliminates the causes of sound quality deterioration such as low frequency phase rotation caused by the inclusion of a capacitor in the signal path, achieving pure transmission of music signals and a wide range.A diamond differential circuit is mounted in the power amplifier section.The circuit configuration employs a constant current differential circuit using dual FETs that allows a large current to flow with low noise characteristics in the first stage, and a diamond differential circuit using a cascode bootstrap in the second stage.In addition, the power stage uses NM (Non Magnetic) transistors with good linearity, and the entire circuit is constructed of a symmetrical circuit and has a 2-pole phase correction circuit, achieving waveform transmission with little distortion up to high frequency range. doing.The circuit configuration of the equalizer amplifier section is a direct couple method that eliminates the input capacitor that causes sound quality deterioration.The first stage uses dual FETs with high stability, low noise, and high GM, and has two differential stages and a current Push-pull drive with mirrored current differential, pure converter SEPP output.Moreover, the equalizer element of the NF circuit uses a highly accurate metal film resistor and a styrene capacitor with few capacitance errors and excellent temperature characteristics.The flat amplifier section also employs a direct couple system that eliminates input capacitors that are not effective in terms of sound quality.The first stage is a cascode-connected differential amplification with current source using low noise, high GM dual FETs, and the second stage has an eight-stone configuration with a current differential push-pull circuit with a current mirror, making it a DC power amplifier. Like the section, it has an excellent configuration with open loop characteristics aimed at reducing TIM distortion.Also, when the tone is turned on, the flat amplifier switches to the NF type tone amplifier, providing straightforward tone control characteristics with little distortion.The power supply part is made into 2 power transformers, and the left and right completely independent system is adopted.In addition, by using a 12,000?Fx4 electrolytic capacitor and a metallized film capacitor, we have achieved low impedance characteristics from ultra-low to ultra-high frequencies.Equipped with an MC head amplifier.Equipped with a loudness switch, subsonic filter, tone defeat switch, and balance control.The tape play function and tape copy can be performed independently, and it is also possible to take out the tuner signal independently during recording.For example, you can check the air while listening to a record. Two speaker output systems can be connected: OFF, A, B, and A+B.Equipped with 3 spare AC outlet circuits (1 interlocking circuit 100W, 2 non-interlocking circuits 250W) and a ground terminal.It is possible to separate the pre and power.?Main specificationsEffective output 70W+70W (10Hz to 20kHz, THD 0.008%, 8?)70W+70W(1kHz, THD 0.003%, 8?)Total harmonic distortion rate 0.008% or less (10Hz to 20kHz, effective output, 8?)Cross modulation distortion rate (70Hz:7kHz=4:1) 0.008% or lessOutput bandwidth 5Hz to 70kHz (IHF, both channel operation, 1kHz, 8?)Damping factor 100 (IHF, both channel operation, 1kHz, 8?)Frequency characteristics DC to 400kHz, +0 -3dBInput sensitivity/input impedance 1V/47k?(1kHz)SN ratio 125dB or more (IHF, A network, short circuit)Channel separation 90dB or more (IHF, 1kHz)Rise time 0.5?secSlew rate ±160V/?secInput sensitivity/input impedance(1kHz) Phono-1 MM:2.5mV/47k?Phono-2 MC only: 0.1mV/100?AUX, Tuner, Tape Play 1, 2 (PIN): 150mV/47k?MC compatible impedance 100? or lessPhono maximum allowable input (1kHz) Phono MM:300mV(THD 0.01%)Phono MC:15mV(THD 0.03%)Output voltage (1kHz) Tape Rec 1, 2 (PIN, at 47k?): 150mVPre Out (at 47k?): 1VMax Pre Out (THD 0.05%, at 47k?): 4VOutput impedance (1kHz) Tape Rec 1, 2: 600? or lessTotal harmonic distortion rate Phono MC (1kHz, 6V): 0.01% or lessPhono MM (20Hz - 20kHz, 6V): 0.005% or lessAUX, Tuner, Tape Play 1, 2 (20Hz - 20kHz, 1V): 0.005% or lessCross-modulation distortion rate (70Hz:7kHz=4:1) AUX, Tuner, Tape Play 1, 2 (1V): 0.005% or lessFrequency characteristics RIAA deviation (Phono 1, 2, 20Hz - 20kHz): ±0.2dBAUX, Tuner, Tape Play 1, 2:5Hz - 100kHz, +0 -1dBSN ratio (IHF, A network,Short circuit) Phono MC (input conversion): -152dBVPhono MM:88dB or moreAUX, Tuner, Tape Play 1, 2: 100dB or morechannel separation(IHF, 1kHz) Phono MC: 70dB or morePhono MM:70dB or moreAUX, Tuner, Tape Play 1, 2:75dB or moreSeparation between inputs(Input short, 1kHz) Tuner?Phono MM:90dB or moreTape Play 1, 2?Phono MM:90dB or moreTuner?Tape Play 1, 2:90dB or moreTape Play 1?Tape Play 2: 90dB or moreTone control Bass:±10dB(50Hz)Treble:±10dB(15kHz)Subsonic filter 16Hz (-3dB, 6dB/oct)loudness(Volume -30dB) +10dB(50Hz)+4dB(10kHz)Headphone terminal output 85mW (8?)Load impedance 4~16?Rated power consumption 195W (Electrical Appliance and Material Control Law)External dimensions Width 430x Height 168x Depth 390mmWhen equipped with rack mount adapter: Width 482x Depth 418mmWeight 15.5kgWhen equipped with rack mount adapter: 16kg?The condition of the product is rank D. It is a junk item with scratches and dirt.The product is everything shown in the photo. Please be sure to check the photos.The power cord is broken.There is a large dent on the back, and the top is slightly bulged.There are some small scratches and scratches, and there are tape marks on the back.Some dirt remains.We have not been able to confirm all operations.Therefore, we will exhibit it as a junk item.There are places where the knob wont stop turning.For remote delivery areas, additional fees will be charged. Import duties,taxes and charges are not included in the item price or shipping charges. These charges are the buyers responsibility. These charges are normally collected by the delivering freight(shipping) company or when you pick the item up. -do not confuse them for additional shipping charges. We do not mark merchandise values below value or mark items as gifts. -US and International government regulations prohibit such behavior.
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