Усилитель marantz pm-74d

Звучит отлично. До 25Вт работает в классе А, затем переходит в класс АВ до 100 Вт. В отличном состоянии на 5 ку. Marantz PM-74DJPY 79,800 (around 1986) The Integrated Amplifier which inherited the design concept and technique of PM-84, and was developed. Marantz's original quarter A is adopted as a circuit system, it operates in pure A class up to 1/4 (quarter) of the maximum output, and above that, it automatically shifts to AB class and demonstrates 100 W output To do. In addition, PM-74D is equipped with AVSS that shifts the output supply voltage in conjunction with Quarter A. AVSS shifts the output supply voltage according to the power to operate the power element in the area with the least distortion and noise. This is making the power element operate in the ideal state in all power levels. The direct switch of a flat amplifier direct connection is carried in CD and Phono input. CD direct connects directly to a flat amplifier simply by passing through the volume. Moreover, Phono Direct is reproduced by the shortest path of phono amplifier / volume / flat amplifier / power amplifier. The direct coupling by low noise FET is adopted as high level input, such as CD, and the SN ratio is improved. The circuit design of the preamplifier has been redesigned, and the AIE (absolute / isolate / earth) circuit is installed. In the AIE circuit, crosstalk distortion is banished by completely separating the grounds of the left and right channels to improve separation. It has 7 inputs and 2 outputs. The differential circuit plus 2 pole compensation Phono exclusive IC by high Gm super-low noise FET is adopted as the Phono input. A large transformer and a large capacity condenser are adopted as a power-source part. High quality sound is achieved by using OFC wiring for main wiring and adopting copper plating screws. Model Integrated amplifier Rated output (Both channel operation, 20Hz-20kHz) AB class: 100W + 100W (8?) Pure Class A: 25W + 25W (8?) Output bandwidth 5Hz to 50kHz (8? load, THD 0.03%) Total harmonic distortion 0.015% (20Hz-20kHz, 8? load) Cross modulation distortion 0.015% Frequency characteristic 20Hz ~ 20kHz +0 -0.3dB Dumping factor 100 (6? load) Input sensitivity / impedance Phono MM: 2.5mV / 47k? Phono MC: 250?V / 100? Tape, Tuner, CD, TV / aux1, Video / aux2: 150mV / 20k? RIAA deviation 20Hz to 20kHz ± 0.2dB S / N ratio (IHF-A network) Phono MM: 86dB Phono MC: 75dB Tape, Tuner, CD, TV / aux1, Video / aux2: 98dB Phono maximum allowable input (1kHz) MM: 140mV MC: 14mV Tone control Bass: ± 10dB (100Hz) Treble: ± 10dB (10kHz) Power supply AC100V, 50Hz / 60Hz Power consumption (Electrical Appliance and Material Control Law) 220W External dimensions Width 462x height 164x depth of 376mm weight 14.3kg Привезу любую технику из Японии под заказ и новую технику любых брендов, сделаем профилактику. Соберём комплект усилитель, виниловый проигрыватель, акустика. Возможна плата по безналичному расчёту для юридических лиц