Audio Database Aurex SC-77 120,000 yen(an age -- unknown) Description �@ SC-77 is considering it as monophonic amplifier, the influence of the sound in right and left is eliminated, and high-quality sound-ization is attained more. The 2 steps of first rank cascode connection three-step Darlington whole page direct connection pure complimentary OCL circuit is adopted. In the output stage of the push pull system, the output of 120W has been obtained at 20Hz - 20kHz. The input gain change-over switch of the amount of NF(s) variable system is carried. Usually, although Input sensitivity is 1.6V, it is possible to improve by about 10dB with a switch. In order to prevent amplifying a low-pass unnecessary noise as it is, the Subsonic Filter was prepared and 10Hz or less is cut by 12 dB/oct. An Attenuator type level control is carried. The efficient large-sized toroidalcore transformer is carried in the power-source part. Moreover, also paying attention to a power source capacitor, 11000 micro F is carried two. This electrolytic condenser reduces the etching area of electrode foil, and is striving for the fall of impedance as a low magnification structure where large electric current density can be taken. The survey data sheet by a computer (CADIS) is attached. Rating of a mode Form Monophonic power amplifier Circuit system First rank cascade connection 2 steps of differential whole page direct connection OCL Three-step Darlington Parallel push pull system Specification semiconductor Transistor x32, diode x21 Effective output (20Hz - 20kHz) 120W (0.05% distortion, 8ohms) 170W (0.05% distortion, 4ohms) THD (20Hz - 20kHz) At the time of an effective output : 0.05% At the time of 60W output : 0.04% At the time of 1W output : 0.05% It is 1kHz at the 60W output time. : 0.002% It is 50kHz at the 60W output time. : 0.02% It is 100kHz at the 60W output time. : 0.08% Cross modulation distortion (50Hz:7kHz=4:1) At the time of an effective output : 0.08% At the time of 1W output : 0.03% output bandwidth (IHF, 8ohms) 5Hz - 100000Hz (distorted 0.1%) Frequency response (at the time of 1W output) 5Hz-100000Hz+0dB-0dB Input sensitivity/impedance 1.6V/50kohm (being a switch 10dB up) Dumping factor (8ohms) 50 or more Signal to noise ratio (IHF A network) 115dB Remains noise 0.3mV Subsonic Filter 10Hz(12dB/oct) Power source AC100V 50Hz/60Hz Power consumption 165W Dimensions Width 450x height 93x depth of 375mm Weight 11kg