Description
????Item Title????DescriptionACCUPHASE M-2000 Monophonic Power Amplifier PAIR ? It is in perfect condition.? A new musical life! SHIPPED IN A WOODEN CRATE???? Model RatingsType Monaural power amplifierRated Continuous Average Output(between 20Hz and 20kHz) 1? load: 2000W (limited to music signal)2? load: 1000W4? load: 500W8? load: 250WTotal harmonic distortion ratio 1? load: 0.12? load: 0.054? to 16? load: 0.03IM distortion ratio 0.003Frequency response at rated continuous average output:20Hz to 20000Hz +0 -0.2dBAt 1W output:0.5Hz to 160000Hz +0 -3.0dBGain 28.0dBLoad Impedance Continuous output: 2? to 16?For music signal: 1? to 16?Damping factor 400Input sensitivity (8? load) At rated continuous average output:1.78VAt 1W output:0.11VInput impedance Balanced:40k?Unbalanced:20k?S/N(A-correction) 120dB(input short, at rated continuous average output)Output meter logarithmic compression type-60dB to +3dB and output direct reading scalePower supply AC100V, 50Hz/60HzPower consumption No input: 180WElectrical Appliance and Material Control Law: 950WAt 8? rated output: 585WDimensions: W 475 x H 252 x D 545mmWeight 50kg Monaural power amplifier developed for ideal constant voltage drive. High-power transistors with a collector loss of 130W and a collector current of 15A are used. These are configured in a 22-parallel push-pull configuration to achieve ultra-low impedance. These elements are mounted on a huge aluminum die-cast heat sink for efficient heat dissipation.As a result of this margin, a large output power amplifier with linearity up to ultra-low impedance loads is realized, and it also demonstrates excellent power in driving loads that include reactance components. A current feedback amplifier circuit that feeds back the output signal in the form of current is employed.First, the impedance of the input terminal on the feedback side is lowered to detect a current. The current is then I-V (current-voltage) converted by a transformer-impedance amplifier to produce the output signal.The extremely low impedance of the feedback input section prevents phase rotation, resulting in almost no need for phase compensation.As a result, a small amount of NFB can significantly improve various characteristics, resulting in excellent dynamic characteristics such as rise time and natural energy response in terms of sound quality. By bridging two M-2000 amplifiers, the output can be increased fourfold.In the bridge connection, two amplifiers are input with the same voltage and opposite phase signals to each other, and a speaker is connected to the output end of both amplifiers.In the bridge connection, the output power is increased by a factor of 4, making it a super-dreadnought monaural amplifier of 1000W/8 ohms. Balanced connection terminals are provided to minimize exposure to external induced noise. Components through which signals pass are usually made of pure copper, but the M-2000 uses gold plating on top of this.Thorough efforts have been made to improve sound quality on the copper foil surface of the printed circuit board, as well as on the grounding plate, capacitor terminals, input terminals, and speaker terminals, which carry large ripple currents. In the power supply section, a large super ring type toroidal transformer with a large power capacity of approximately 1.5kVA is employed.This transformer is adhered to a non-resonant aluminum case with a highly efficient heat dissipation structure using a filler material with excellent thermal conductivity and high vibration isolation effect, thereby blocking external influences.Furthermore, the iron cores cross section is close to a circle, and the coil can also be wound close to a circle for better adhesion, resulting in less loss and lighter weight. Leakage flux under load is also reduced, resulting in less roar and vibration. In addition, the cross-sectional area of the iron core is smaller and the weight ratio of copper wire is larger, resulting in smaller iron loss and inrush current.In addition, two large electrolytic capacitors of 40,000 ?F/120 WV are used. A phase switch is provided to invert the phase of the entire system.Switching is done simply by switching the positive and negative of the balanced amplifier input section, so there is no deterioration in sound quality. A large logarithmic compression type power meter is provided.Meter operation and illumination can be turned on and off. Extra-large speaker terminals are provided to accommodate extra-large speaker cables.The material is solid brass, machined and gold-plated, and covered with a molded cap for insulation purposes. ?The watch has not been overhauled. Those that have been overhauled are noted.?If there is something you are looking for, please feel free to contact us.? If there is a discrepancy between the photo and the description on the product page, the photo will be considered as the correct one.Thank you. Shipping Standard Shipping ( Japan Post , FedEx , DHL ) The package will arrive 5-14 days after shipment. International Buyers - Please Note:Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyers responsibility. Please check with your countrys customs office to determine what these additional costs will be prior to bidding or buying. If there is a remote charge for your address we will charge you for additional shipping.Thank you for your understanding. ReturnsReturn Policy. We value your satisfaction with our service. We have an unconditional return policy if notified within 60 days of receipt ( time limits vary by item ). All returns must be in original condition. Once the product has been used, it cannot be returned. Returns must be made within the time limit upon receipt of the merchandise.Please contact us first for return before you ship it back to us.Thank you !
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