SANSUI AU-D907 Integrated Amplifier (Transistor) 228070079 from JAPAN

Description: Item Description This is a SANSUI pre-main amplifier. I have been using it for a while since I received it, but I introduced an active speaker, and it became too much for me, so I put it on display. I used it normally until the beginning of October.I think there is no problem with the use. Only check the energization. We treat it as junk just in case to prevent trouble. Sansui's original super feed forward system adopted in the power amplifier sectionThe AU-D 907 F EXTRA uses MOS-FETs as error correction amplifiers to further improve circuit quality. The use of MOS-FET circuits, which have more than five times the switching speed of bipolar transistors and are superior in broadband characteristics and temperature stability, improves the stability of the distortion cancellation signal produced by error correction amplifiers.The pre-driver stage is equipped with a diamond differential circuit that minimizes the TIM distortion to zero. Equipped with linear step MC transformer to support MC cartridgeThis transformer is a reflection of Sansui's amplifier and transformer technologies. It is equipped with a Permalloy 5-layer shield structure, a 78% 0.1 m/mL type Permalloy core, a special balanced winding structure with thick windings, and measures against microphonic shock noise. This enables a transformer with good dynamic characteristics and a high signal-to-noise ratio in a wide range.Also, high and low impedance can be switched to accommodate any MC cartridge. The power supply uses a large transformer with balanced windings made from a CI core that is well regulated. The condenser uses a newly developed original alpha condenser with high speed and ultra-low magnification. The 12,000 μFx4 is used to produce low-frequency sound, while the 4,700 μFx4 alpha condenser is used to enhance the mid-range sound. Fast recovery diodes are also used to increase the speed of playback.In addition, a total of five power supply structures have been adopted to achieve left and right independence and to eliminate interference between stages. The equalizer circuit uses a diamond differential circuit DC amplifier.The first stage has good pair characteristics and employs a differential circuit using low noise and high gm dual FETs. Shipping Free Shipping Payment eBay Managed Payments Other Term International Buyers Please Note: Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding/buying. 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.

Price: 579 USD

Location: tokyo

End Time: 2024-08-24T02:29:07.000Z

Shipping Cost: 0 USD