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Quad amplifier 40W

2015-01-03 14:31  
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40W 4 channel audio amplifier 300x279 Quad amplifier 40WThis circuit?provides?a total of four?speakers?4 ohms?and?40W?at?12v?powered.?It is therefore?ideal?for use?in the car.?Total?harmonic distortion?is rather high,?about 10%?at full power.?But?with?half the power?requirements?(20W)?is less?than 2%.?Anyway it?is not intended?to?have a?high performance?system?in the car.

With the?integrated?audio?TDA8571J?designed?for?automotive applications,?this 40w amplifier circuit can expand?the sound?of the car radio?or?connect?a portable?MP3?player?in it.?Internally, the?chip?has eight?operational?amplifier?set?on the bridge, allowing?each?speaker terminal?being energized.?Dont?connect the?negative terminal of?the mass of?the speaker,?because?they?will?produce?a short circuit?on the?output.

As usual?in these kinds of?development,?the heat?dissipation?is an important factor?forproper?cooling?to?ensure stable operation,?but?poor ventilation?can?destructive?circuit.Although it?has?an internal?thermal?overheating?protection,?is still?destructive.

If?you?want to?use it at home?(not?recommended),?you?should?use a?12V source?capable of?draining?up to?250w?at?12v.?Remember?that?filtering?is?a key?source of?success in anyaudio?installation.?Use a?large?electrolytic?capacitor?to?eliminate?riple?and,?in turn,?foreliminate the?RF?ceramic?capacitors.

For input?using?shielded cable?and?RCA?female?plugs.?To?connect to the?car?radio?is recommended?that?you?put between?it?and the?amplifier?a?passive?equalizer,?In addition to?controlling the?tone?voice,?also can reduce?in?signal?strength.

In the audio car application should?be very careful?where you?get?power?because?the system requires?a large amount?of power.?Placing it on top?of the?light?rail?is?possible?to?damage?the vehicleelectrical?system?or, alternatively,?you?can?blow the?fuse.?A good alternative?is to place itdirectly from the?battery?of the car?and switch the?power?through?the relay coil?halogenlamps?which?connected in?parallel?to?the antenna?output power?or?control?of existing equipment.


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