Description
Product descriptionStereo power amplifier that uses the W/super servo system. The W/super servo method is adopted, which feeds back harmful components from both the + and - sides of the output end via a servo amplifier and cancels them.The output stage has a three-stage Darlington configuration, and uses high fT power transistors to achieve low distortion output. Furthermore, the operating characteristics of the power transistor are set to Onkyos original linear switching method, which further improves the distortion rate.This method was developed with the aim of producing A-class characteristics while taking advantage of B-class characteristics, focusing on the fact that normally only the final output stage of an amplifier functions as a B-class amplifier.The bias is fixed. It is a method with linear characteristics that was developed based on the design policy that high fT power transistors should be used, and it demonstrates excellent performance in combination with high fT power transistors.The power supply section uses a newly developed large-sized twin-wind transformer as a result of pattern research on its effect on sound quality. In addition, as a result of careful hearing and investigating the correlation with the physical properties of the material, we have developed a low-inductance circuit that directly connects a multi-tab type low-impedance, wide-range chemi-con to the printed circuit board. I am using it as.Furthermore, thorough low impedance has been achieved by using bus lines for power supply and distribution to each section, earth lines, etc.A monolithic IC is used for the protection circuit, which improves stability and also detects DC leakage voltage appearing at the speaker terminals and overcurrent in the power stage, and instantaneously activates a relay (using silver contacts/parallel) in the event of an emergency. protects circuit components.Speaker switching prevents deterioration of the damping factor by switching SP-1 and SP-2 dedicated protection relays. In addition, the low-pass filter for the DC voltage detection amount is independent of LR, so it works even when the left and right polarities are different.A large peak meter is used that performs logarithmic compression and peak hold using a highly stable monolithic IC.In addition, in order to obtain high-speed response, it is driven by a dedicated drive circuit using an operational amplifier.The level can be changed from 0dB to 120W and 12W with the front switch.We carefully examine everything from semiconductor elements and transformers to resistors, capacitors, printed circuit boards, wiring lead wires, and solder.?Main specificationsModel W/Super servo stereo power amplifierEffective output (20Hz to 20kHz) 160W+160W (4?)120W+120W(8?)Dynamic power (1kHz) 180W+180W (8?)Total harmonic distortion (THD, 20Hz to 20kHz) 0.003% or less (at effective output)0.003% or less (at 60W output)Cross-modulation distortion rate (SMPTE 70Hz:7kHz=4:1) 0.003% or less (at effective output)Power band width (IHF -3dB, THD 0.2%) 5Hz to 100kHzGain 26.3dBFrequency characteristics 1Hz to 100kHz +0 -1.5dBSN ratio (IHF-A network input shunt) 120dBInput sensitivity/impedance 1.5V/47k? Speaker load impedance 4?~16?Damping factor (8?, 1kHz) 180 Output terminal Speaker System1, 2 HeadphoneTransient killer operation time Power on:5secPower off:100msecSemiconductors used: Transistors: 47, FET: 2, IC: 6, diodes: 40Power supply AC100V, 50Hz/60HzAC outlet maximum 600WPower switch non-interlocking: 1 systemPower consumption 190W (Electrical Appliance and Material Control Law)Maximum external dimensions Width 450x Height 174x Depth 400mmWeight 18.5kg?The condition of the product is that it has scratches and dirt.Confirmed to be energized and was used until about 3 years ago. We have not confirmed the sound output.For remote delivery areas, additional fees will be charged. Import duties,taxes and charges are not included in the item price or shipping charges. These charges are the buyers responsibility. 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.
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