Description
Product descriptionAiming to be a work of art, this integrated amplifier condenses Yamahas circuit technology and achieves a high degree of perfection comparable to that of separate amplifiers.*The basic circuit configuration consists of an equalizer amplifier, tone control amplifier, DC amplifier, main amplifier with volume switchable between class B and class A, and a head amplifier for MC cartridges.The equalizer amplifier, tone control amplifier, and MC head amplifier have almost the same circuit configuration as the C-2.*The circuit configuration of the main amplifier is: first stage current mirror cascode bootstrap FET differential amplification ? cascode connection constant current load emitter grounded amplification ? Darlington connection pure complementary parapush OCL drive / Output stage, signal path / NF loop to capacitor This is a DC amplifier that eliminates the*The equalizer circuit consists of a cascode bootstrap current mirror differential input using Yamahas original super low noise pair FETs, a Darlington connection constant current load emitter grounding, and a pure complementary SEPP output stage.*The basic circuit configuration of the tone circuit is almost the same as the equalizer amplifier, and the second stage Darlington connection is omitted because it does not require as much gain as the equalizer amplifier.A volume is inserted in the front stage of the tone amplifier, and when the volume is turned down, the signal source impedance changes, but by adopting a cascode bootstrap circuit like the equalizer amplifier, distortion due to changes in signal source impedance is eliminated. There is no deterioration in rate.*The MC head amplifier section uses Yamahas original super low noise IC to achieve a high SN ratio for the rated input.*In order to improve the SN ratio during actual use, two high-precision quadruple volume units are installed per channel on the input and output sides of the tone amplifier, and the output side ranges from 0 to 6 dB, -24 to -infinity, and from -6 dB to -infinity. Adjustment is made on the input side to -24dB.*The peak meter can indicate the peak level of a signal in a wide range of -50dB to +5dB (0dB = 100W/8?) and 1mW to 316W/8? using a logarithmic compression circuit and a peak hold circuit. It also has a fast rise time of 100?s and is compatible with pulsed signals.Furthermore, the meter is equipped with a changeover switch, and the output level of SP out and the output level of Rec out can be switched and displayed.*Equipped with a Mode switch, Stereo Normal, Stereo Rev, L+R, L, and R can be selected.* Equipped with a muting switch, -20dB muting is possible with a single switch.Also, if you set this switch to the Pre out off position, the Pre out signal will no longer be output.*The preamplifier section and main amplifier section can be used separately.*In order to further improve low noise and low distortion, the equalizer sheet is directly connected to the rear panel, no shielded wires are used, and the printed circuit board pattern is designed to minimize noise and distortion. The board through which the signal passes is tightly shielded.Furthermore, with an emphasis on operability, newly developed universal joints are adopted for the Phono selector, Rec out selector, and Input selector, achieving low noise, low distortion, and improved operability.?Main specificationsEffective output (0.03%, Aux)20Hz to 20kHz: 140W+140W (4?, class B) 120W+120W (8?, class B) 30W+30W (8?, class A) 1kHz: 180W+180W (4?, class B)130W+130W (8?, B class)Total harmonic distortion rate (20Hz to 20kHz) Phono 1, 2 ? Rec out (5V): 0.003% or less Phono MC ? Rec out (3V): 0.03% or lessTuner, Aux ? Pre out (3V): 0.005% or less Main in ? SP out (60W, B class, 8?): 0.01% or less (15W, A class, 8?): 0.005% or lessTuner ? SP out (60W, B class, 8?): 0.01% or lessPower band width (0.03%, 8?) Class B: 10Hz to 50kHz Class A: 10Hz to 70kHzDamping factor 45 or more (8?, 1kHz)Frequency characteristicsPhono 1, 2 MC (RIAA deviation): 30Hz to 15kHz ±0.2dB Tuner-Pre out: 5Hz to 100kHz +0 -1dBTuner-SP out (8? load): 5Hz to 50kHz +0 -1dBInput sensitivity (rated)/impedance Phono 1:2mV/47k?, 68k?, 100k? Phono 2:2mV/47k?Phono MC:50?V/10??Tuner, Aux:120mV/50k??Main in:1V/50k?Maximum allowable input (1kHz, 0.02% distortion) Phono1, 2: 310mVr.m.s Phono MC: 7.5mVr.m.s Tuner, Aux: 20Vr.m.s Output level/impedance Rec out: 120mV/600? Pre out: 1V/500?Tone control characteristics Bass (125Hz?500Hz): ±10dB (20Hz) Treble (8kHz?2.5kHz): ±10dB (20kHz)Subsonic filter 15Hz, 12dB/octHigh filter 10Hz, 12dB/octNoise level/SN ratio (IHF-A Network) Phono1, 2:82dB Phono MC:71dB (input 50? short) 68dB (input 0? short)Tuner, Aux, Tape: 100dB Main: 118dBResidual noise 0.07mV or lessPower supply AC100V, 50Hz/60HzRated power consumption 300WExternal dimensions Width 461x Height 170x Depth 360mmWeight 20kg?The condition of the product is C RANK: Used item with signs of use and many scratches and stains.Maintenance completed by our stores designated contractor (power circuit, tribe transistor, small transistor replacement, protection relay overhaul, bias voltage adjustment, contact failure cleaning of each switch)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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