Description
DescriptionMR series pre-main amplifier with New Hyper ?-X balanced circuit. The New Hyper ?-X balanced circuit is used to reduce electrical noise generated inside the circuit to zero in operation. This circuit is composed of the Hyper ?-X balanced circuit and the Advanced Wilson Current Mirror type balanced current circuit, which was developed by further developing the Wilson Current Mirror high CMRR type constant current circuit that realizes a theoretical improvement of 140dB in CMRR. This circuit is a further development of the advanced Wilson current mirror type constant-current circuit. This makes the driver stage a closed loop with separate windings, which successfully rectifies current variations due to DC offset caused by asymmetry of elements in the circuit, and also improves the stability of the operation of the circuit itself. The main power supply section of the output stage, where transformers and electrolytic capacitors are assembled, is also closed-loop with separate windings, creating an optimal operating environment for balanced amplifiers throughout the entire system, from sound entry to exit. In addition, NM-LAPT, a dedicated audio device, is employed. In order to enhance the response to instantaneous signals, a New Diamond differential circuit is used in the drive stage, which allows the output to be taken out without phase inversion, thus realizing excellent characteristics with high current supply capability for rapidly changing input signals. In addition to the cascade connection of FETs in the first stage, the driver power supply section is symmetrical and balanced, resulting in a wide range and high speed circuit, which further improves the operating characteristics of the New ?-X balanced amplifier. It also prevents sound quality degradation when connecting external devices with different impedances. The power supply section uses the New ?-X balanced power supply. The output stage is a balanced close, and the driver stage is a balanced constant-current power supply with symmetrical upper and lower balance and a closed-loop configuration that is completely independent from grounding, preventing unbalanced current in the power supply from adversely affecting sound quality. Furthermore, the stable high current supply capability is realized by employing carefully selected original parts such as a large power transformer with a special structure, electrolytic capacitors for power supply, and fast recovery diodes. Vibrations from the power supply system and vibration system are controlled by reinforced twin monaural construction and isolated mechanical feedback. High-quality parts such as gold-plated leaded resistors and capacitors are used, as well as specially constructed insulators that disperse and absorb external vibrations. By connecting to the power amp direct input terminal, each source passes through the circuit in the shortest distance and can be directly connected to the power amp section. It also has a source power direct function. The volume uses a 6-set detent volume. SPECIFICATIONSModel Integrated amplifierEffective output (10Hz to 20kHz,Both channels operating simultaneously) 105W+105W (6?)90W+90W (8?)Total harmonic distortion (at RMS output) 0.003% or less (8 ohms)Modulation distortion ratio: 0.003% or less (8 ohms)Damping factor 150 (8?)Frequency response (1W) DC to 300kHz +0 -3dBInput sensitivity/impedance (1kHz) 1V/5k?SN ratio (A-network) 120dB min.Dynamic Power 280W(2?)220W(4?)155W(6?)TIM distortion (Sawtooth) Below measurement limitSlew rate 180V/?secRise time 0.6?secInput sensitivity/impedance (1kHz) Phono MM: 2.5mV/47k?Phono MC:300?V/100?CD, Tuner, Line, Tape/DAT1, 2: 150mV/20k?Phono maximum allowable input MM:210mV(THD 0.01%)MC:21mV(THD 0.1%)Frequency response (1W) Phono MM:20Hz to 20kHz ±0.2dBCD, Tuner, Line, Tape/DAT1, 2: DC to 200kHz +0 -3dBSN ratio (A-network) Phono MM: 88dB min.Phono MC: 70dB min.CD, Tuner, Line, Tape/DAT1, 2: 110dB or betterTone control Bass max. change: ±6dB(50Hz)Treble maximum change: ±6dB(15kHz)Subsonic filter 16Hz(-3dB), 6dB/octLoudness +6dB(50Hz), +4dB(10kHz) All items in my store are 100% authentic.Please contact me if you have any questions.ShippingWe always send the item with a tracking number. So please place an order without any concern on delivery. You can always track the delivery status.Shipping is only available to the address registered in eBay. If you want us to send another address, please change your address on eBay and then place an order.FedEx or DHL or Japan Post serviceShip our within 10 business days once receive paymentAbout Importers ObligationImport 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. These charges are normally collected by the delivering freight 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.Thank you for your understanding.KJ
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