The modified C-Class Sixteen model of the Harman card company in 1976 is able to deliver 400 watts of power through a 4-ohm speaker with an AB class Amplifier circuit . The power transistors 2SC5200 and 2SA1943 use the...Electronics Projects, Amplifier Circuit 400W Harman kardon Modified Clone "audio amplifier circuits, transistor amplifier, " Date 2019/08/04
The modified C-Class Sixteen model of the Harman card company in 1976 is able to deliver 400 watts of power through a 4-ohm speaker with an AB class Amplifier circuit. The power transistors 2SC5200 and 2SA1943 use the TL072 opamp in the 400w anfi circuit. The OPA2134 opamp is said to be of better quality available but the price is high …
400W Amp circuit diagram
Features of the 400W Anfi circuit
250W power output with 8 ohm speaker 400W power output with 4 ohm speaker + 26dB / + 33dB gain – Frequency response 10Hz-100KHz +/- 0.5dB ( multisim simulation result em>) THD @ 1kHz <0.01% ( multisim simulation result em>) DC Offset output is lower than 50mV
The ammeter’s power supply is symmetrical + 75v -75v DC capacitor for the filter layer is prepared with pcb 35 amperes bridge diode is mounted in the amplifier chassis used transformer 2X52V AC output power should be at least 850VA
Be very careful when making circuits and the quality of the materials used will be better if their quality is high. For the first test, the transformer input must be connected to the transformer input for the first time. If there is no problem when the power is supplied, connect the DC voltmeter to the output without giving an audio signal to the input. Set the trimmer until the value is less than 50mV or 50mV.
The writer noted that if everything is true and the voltage is too high than 50mV, the opamp needs to be replaced.
ATTENTION Be careful with the capacitor high voltage circuitry + – Be careful with the capacitor connections + Reverse polarity may cause large explosions at high voltage Fuse Power Line,