Description
Product descriptionA stereo power amplifier based on the P-300 and P-300S that has been significantly improved by introducing the latest technology.A MOS FET is used for the drive stage, and a broadband transistor is used for the output.By using a MOS FET in the front stage, the bias voltage of the output stage is stabilized, and the emitter resistance of the output stage can be removed. As a result, the bias of the output transistor at high output is not cut off, and switching distortion is almost eliminated.MOS FET drives have high input impedance, making the operation of the previous stage easier, enabling higher performance.A cascode connection of transistors is adopted as a pre-drive stage, and wideband amplification is performed stably.The cascode bootstrap differential push-pull input is adopted as the input circuit, and while obtaining a large gain, the high frequency characteristic is improved and the deterioration of the distortion factor due to the rise in input impedance is prevented.By configuring the FET input, the input coupling capacitor is removed and connected directly.Furthermore, direct current feedback is applied with a DC servo amplifier to block direct current and suppress DC drift occurring within the circuit.In the power supply section, the power transformer has dedicated left and right windings to suppress left and right interference due to the dedicated rectifier and filter circuit.It has a built-in bridge circuit that allows the stereo power amplifier to be used as a monaural power amplifier, and with the flip of a switch it becomes a high-power monaural power amplifier. amplifierWith a bridge connection, the amplifier works in both the + and - directions, doubling the voltage applied to the speaker, increasing power, and also canceling out distortion, improving characteristics.Equipped with a step attenuator that changes in 1dB steps up to -20dB.Equipped with a logarithmic compression type peak level meter, the output power of an 8? load can be directly read along with the dB scale.In addition, peak hold is possible with the meter function changeover switch, and the peak value can be held and displayed every 3 seconds.It has input/output terminals on the front panel.?Main specificationsModel stereo power amplifierContinuous average output(20Hz to 20kHz, distortion rate 0.01% or less)When using stereo: 200W+200W(4?)150W+150W(8?)75W+75W(16?)Bridge connection: 400W (8?)200W(16?)Total harmonic distortion(0.25W~rated output, 20Hz~20kHz)When using stereo: 0.01% (4?)0.005%(8?)0.005%(16?)Bridge connection: 0.01% (8?)0.01%(16?)IM distortion rate (new IHF) 0.003%Frequency characteristics 20Hz to 20kHz +0 -0.2dB (rated output, level control maximum)0.4Hz to 500kHz +0 -3.0dB (output 1W, level control maximum)0.4Hz to 150kHz +0 -3.0dB (output 1W, level control -6dB)Gain When using stereo: 27.8dBBridge connection: 33.8dBLoad impedance When using stereo: 4? to 16?Bridge connection: 8? to 16?Damping factor (new IHF, 50Hz) When using stereo: 150Bridge connection: 75Input sensitivity/impedanceWhen using stereo: 1.4V/50k? (rated output)0.11V/50k? (new IHF, 1W output)Bridge connection: 1.17V/50k? (rated output)0.06V/50k? (new IHF, 1W output)S/N (A correction)When using stereo: 120dB (rated output, input short)100dB (new IHF, 1W output)Bridge connection: 110dB (rated output, input short)90dB (new IHF, 1W output)Stereo headphones low output impedance typeSubsonic filter 17Hz, -12dB/octOutput meter Logarithmic compression type, with peak hold switching-40dB to +3dB and output direct reading scaleSemiconductor used: Transistor: 42 piecesFET: 12 piecesIC: 7 piecesDiode: 61 piecesPower supply voltage AC100V/117V/220V/240V, 50Hz/60HzPower consumption No input: 80WAt 8? load rated output: 550WExternal dimensions Normal: width 445 x height 160 (including legs) x depth 373 mmWhen equipped with a wood case: Width 466 x Height 190 (including legs) x Depth 385 mmWeight 22.5kg?The condition of the product is that it is used and has some scratches and dirt due to daily use.Instruction manual and power cable includedThe back panel is slightly bent.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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