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NIF SHOPDescriptionPlease see description for item condition.perfect working article This is one of the best without pickled ginger. As you can see in the picture, there are small scratches on the exterior. Please check the picture. have about two months to go I will attach the warranty of the store where you bought it. Sansui released a masterpiece model of pre-main amplifier in 1980. Please enjoy the finest vintage sun sui tone. be the best of the 07 series The next generation model of the AU-D 907 This is AU-D 907 F. The AU-D 907 F consists of an equalizer section, an MC head amplifier section, a flat amplifier/tone amplifier section, and a power amplifier section. This was a direct coupling that eliminated the input capacitors in all block stages. Also, in order to stabilize the DC region, However, in order to eliminate the output capacitor, the DC servo system was adopted, and the DC amplifier configuration improved the bare characteristics in all stages. It was equipped with the Super Feedforward System indicated by the F in the model number. In most audio amplifiers, NFB (negative feedback), in which a part of the output is reversed and added to the input side, improves distortion rate, frequency characteristics, SN ratio, and input/output impedance. However, the NFB cannot reduce the distortion to zero. There are many problems such as the lowering of the effect in the high range, and each company reexamined to the NFB technology and developed the new strain reduction technology, etc.. was done. Meanwhile, Sansui was working on a theory called feedforward.. Feedforward produces the distortion canceling signal which is exactly the same as the distortion generated in the output in the amplifier, and combines it with the main signal in the output. It is a technology to cancel all kinds of distortion, but it was said to be an impossible theory. Sansui, after five years of research, has developed a “Super Feedforward System that combines NFB and feedforward. Harmonic Distortion, Cross-Modulation Distortion, and Switching Generated in Power Stages The reduction of dynamic distortion such as TIM distortion, envelope distortion, etc., as well as the large reduction of all distortions such as distortion, crossover distortion, etc. was actually happening.Shipping Fedex , DHL, japan post or Yamato japan for AustraliaInternational 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. Thank you for your understanding.
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