Aurex SB-?77C/sb?77c Toshiba Aurex Integrated Amplifier from japan Description Condition: used Aurex SB-?77C/sb?77c Toshiba Aurex Integrated Amplifier ?Manufacturer/Model NumberAurex SB-?77C ?AccessoriesNone ?Condition/Maintenance ContentsMaintenance operation confirmedPower-SW knob broken repair (creating acrylic for missing parts/tenon processing and gluing)Each SW/VR contact cleaning (E cleaner)Power-SW pilot lamp burned out (replacement)Each input/sound output operation confirmedInterior/Exterior/Input plug cleaningCLEAN-DRIVE terminal lever fulcrum broken, cable fixing force weak/SP-A (R side) SP-B (L side)There are scratches on both sides of the front panel, and noticeable scratches and dirt on the top cover. Maintenance is performed at our store.All parts work normally. ?About the productAurex SB-?77 ?175,000 (around 1980) An integrated amplifier that uses clean drive and ? loop.Type: Integrated amplifier Continuous output: 100W+100W (8?, 20Hz-20kHz)105W+105W (8?, 1kHz)Total harmonic distortion: 0.007% (at rated output)Intermodulation distortion: 0.007% (at rated output)Frequency response: DC-300kHz +0 -3dBOutput bandwidth (IHF, distortion rate 0.05%) 5Hz-80kHz (8?, both channels driven)Speaker impedance: 8?-16?Semiconductors used: Transistors: 80ICs: 2Diodes: 40FETs: 18Power supply voltage: AC100V, 50Hz/60HzPower consumption: 170WExternal dimensions: Width 420 x Height 151 x Depth 399mmWeight: 11.5kg Payment Please pay within 5 days after the auction closed. Shipping About other area, please ask me. When you purchase two or more my items, I can send them together and discount shipping cost. Returns Returns are accepted ONLY if the item was not the item described. International Buyers - Please Note: * Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyers responsibility. * Please check with your countrys 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.

Condition is Pre-owned What is shown in the photos is what you will receive. All included items will be shown in the photos. Please see all photos for details on condition. For size reference the vertical lines in the background are 2 apart on center. If there are any flaws or defects they will be photographed and/or noted in the condition description Items are shipped Monday-Thursday. Items cannot be shipped on weekends. All items ship within 2 business days. Please message me with any questions

Plese Check Photo and Discription.Please feel free to message me if you have any concerns. Manufacturer and model number Aurex SB-?77C Accessories None Condition/Maintenance Maintenance and operation have been checked. Repair broken Power-SW knob (Acrylic made for the missing part/ Adhesion by hoso processing) Cleaned each SW/VR contact point (E-cleaner) Power-SW pilot lamp broken (replaced) Input/output operation confirmed Cleaned inside/outside/input plugs CLEAN-DRIVE terminal lever fulcrum damaged, cable fixation force is weak/SP-A (R side) SP-B (L side) There are scratches on both sides of the front panel and noticeable scuffs on the top cover. The product has been serviced and maintained at our store. All parts operate normally. ?About the product Aurex SB-?77 ¥175,000 (circa 1980) Pre-Main Amplifier Amplifier with clean drive and ? loop. It is equipped with Aurexs original Clean Drive. In the clean drive system, a distortion component detection cord is added to the negative terminal side of the speaker, This detects distortion components generated by the speakers and feeds them back into the amplifier, The distortion components generated by the speakers are detected and fed back into the amplifier. The amount of feedback is then adjusted in the amplifier to cancel the distortion component. The feedback is then sent out to the amplifier. This reduces distortion caused by the transmission characteristics of speaker cables and back EMFs generated by speakers. This improves the dynamic characteristics by canceling the distortion caused by the back EMF generated by the speaker and the transmission characteristics of the speaker cables. Since almost no current flows through this detection cord, there is no voltage drop, distortion components can be detected at the speaker terminals. The cord also detects the impedance of the speaker cable, As a result, the voltage at the speaker input terminal is equal to the output voltage of the amplifier. The voltage at the speaker input terminal is equal to the output voltage of the amplifier, resulting in constant voltage drive. This clean drive system ensures that the amplifier is not affected by the waveforms of the speaker cables when they are connected to the amplifier, The harmonic distortion ratio when connected to speakers is reduced to less than one-tenth, and the intermodulation distortion is also greatly improved, In addition, the intermodulation distortion is also greatly improved. In addition, the impedance of the amplifier and speaker cables can be cancelled, The impedance from the speaker input terminal to the amplifier is zero, The damping factor at the speaker input terminals is infinite. Equalizer The amplifier section consists of dual FET 2SK146 with dual The equalizer amplifier section consists of a first-stage circuit with dual FETs 2SK146 and dual transistors cascode bootstrapped together, The equalizer amplifier consists of a first-stage circuit with dual FET 2SK146 and dual transistors cascode bootstrapped, and a second-stage differential amplifier with cascode bootstrap connection. MM/MC switching is by gain-switching method, which reduces the number of contacts to minimize sound quality degradation. The MC input also uses FETs in the ICL configuration to achieve high sound quality. A simple 2-amp configuration is used between the phono input terminal and the speaker terminals. In addition, there is no coupling capacitor between the Tuner, Aux, and Tape input terminals and the speaker terminals. In the direct position, the equalizer output is directly connected to the main input, thus providing a direct equalizer and tone defeat function. The amplifier section is a low distortion DC power amplifier with a first-stage differential circuit consisting of dual FET 2SK150 with dual transistor cascode bootstrap connections and a second-stage differential amplifier also with cascode bootstrap connections. In key parts of the circuit, a ? capacitor with copper deposition is used to simplify vibration modes and reduce impedance, and a VX capacitor, an improved version of the V capacitor, is used. A newly developed electrolytic capacitor (15,000?F, 63WV) is used in the power supply section. This capacitor uses carefully selected materials, a fast-response paste, low-magnification electrode foil by special etching, and a special method of forming a chemical conversion film to further improve sound quality. Model Pre-main amplifier Amplifier Continuous Output 100W+100W (8?, 20Hz-20kHz) 105W+105W (8?, 1kHz) Total harmonic distortion ratio 0.007% (at rated output) Modulation distortion ratio 0.007% (at rated output) Frequency response DC to 300kHz +0 -3dB Output bandwidth (IHF, distortion ratio 0.05%) 5Hz to 80kHz (8?, both channels driven) Speaker impedance8? to 16? Input sensitivity/impedancePhono MM:2.5mV/47k? Phono MC: 0.25mV/100? Tuner, Aux, Tape play: 200mV/50k? Recording Output 200mV Frequency response DC to 300kHz +0 -3dB Total harmonic distortion ratio 0.007 Tone ControlBass:±8dB(100Hz) Treble: ±8dB(10kHz) Subsonic filter 16Hz, 6dB/oct Muting: -20dB Equalizer deviation 20Hz-20kHz ±0.2dB Phono maximum allowable input(1kHz, distortion 0.01%)MM:300mV MC:20mV SN ratio(IHF-A network, short circuit)Phono MM:90dB Phono MC:71dB Aux:108dB Semiconductors used Transistors: 80 IC: 2 pcs. Diodes: 40 FETs: 18 Power supply voltage AC100V, 50Hz/60Hz Power consumption 170W DimensionsWidth420xHeight151xDepth399mm Weight 11.5kg SHIPPING?FedEx DHL or Japan Phost?From JapanPackages usually leave our warehouse within 10 days of payment.Weekend orders will ship on Monday or Tuesday.We provide valid Tracking Numbers for all orders. We will ship via FedEx. We can also ship by Japan Post. Please contact me prior to purchase if you wish to ship by Japan Post. PEYMENTS?PayPal?Debit?Cards?Credit?CardsWe ship within 48hours of payment.We Ship Within10 Days of Payment. RETURN INFORMATION?Exchabge possible within 30 days.?If you Have any Problems, Please Contact us in Advance Customoms Duty?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.

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Das Gerät wird als defekt beziehungsweise Ersatzteil verkauft. Nur bieten wer damit einverstanden ist. Falls Sie ein Problem mit der Ware haben nach dem Kauf können Sie sich telefonisch oder per Nachricht bei mir melden . Wir finden bestimmt eine Lösung die für beide Seiten optimal ist . Daher bitte vor der Abgabe einer Bewertung bei einem Problemen sich melden. Bilder sind Bestandteil der Artikelbeschreibung. Lieferumfang siehe Bilder. Die Versandkosten beinhalten zudem das Verpackungsmaterial (bitte beachten). BEARBEITUNGSZEIT EINES PAKETES KANN BIS ZU 4 WERKTAGE BETRAGEN!!! Wer mit den Versandkosten nicht einverstanden ist, muss das Gerät nicht kaufen. Wenn Sie ein Problem mit der Ware haben können Sie mich anschreiben und wir finden bestimmt eine optimale Lösung. Wen ein Gerät im Artikelzustand als Ersatzteil/Defekt eingestellt wird , wird es auch ausdrücklich als Ersatzteil beziehungsweise defekt verkauft, daher auch bei ungetesteter Ware , kein funktionsfähiges Gerät erwarten . Versandkosten fürs Ausland bitte Nachfragen. Die Ware unterliegt der Differenzbesteuerung nach UStG. §25a, eine Ausweisung der MwSt. ist nicht möglich.