# How many amps does a car radio use

## How many amps does a radio draw?

Most radios are fused ast 10 amps. Back to the equations, and using P=IV, we can see that for a current of 10 amps and a voltage of 12 volts, there is ONLY 120 Watts of power available on the power wiring to do everything in the radio… Any more and you blow the fuse…

## How many amps does a car stereo draw when off?

The acceptable current draw should be around 0.03Amps. If that can’t be achieved upto 0.075-0.1 can be acceptable if the vehicle is driven most days.

200w

## How many volts can a car stereo handle?

Usually the range is somewhere between 10.5-16.5 volts. A regulated power supply will put out the same power regardless of the vehicle voltage. So even if your vehicle’s voltage drops to eleven volts it will still put out the same power as if the vehicle’s voltage was fifteen volts.

16.667 Amps

## How many amps does a car battery have?

An average car battery has a capacity of around 48 amp hours which means that, fully charged, it delivers 1 amp for 48 hours, 2 amps for 24 hours, 8 amps for 6 hours and so on.

## How many amps is considered a parasitic draw?

The power used as a result of this continuous energy or cumulative load is called parasitic draw. It is usually a very small draw so the battery doesn’t become drained. Parasitic loads can run 20 to 120 milliamps.

## How many amps does a car starter take?

A good starter will normally draw 60 to 150 amps with no load on it, and up to 250 amps under load (while cranking the engine). The no-load amp draw will vary depending on the type of starter.

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## What amps does a car alternator produce?

But nowadays, a single alternator can produce power up to 2500 Watt, depending on the power demand. The power that can be produced by an alternator is determined by the alternator rating. The output of the alternator ranges from 40 Amp up to 120 Amp.

## How many watts is a good speaker?

If you like loud uncompressed music and your speakers are 90dB efficient, 200 Watts is likely plenty of power for you. If you only listen to light classical, jazz and don’t expect them to rock the house, 50 Watts is adequate. Higher efficiency speakers, like horns, take very few Watts.

## How many RMS is 1000 watts?

In fact, most amplifiers labeled as 1000 watts PMPO have a true RMS output of 10 watts or less. One that I measured put out 7.5 watts per channel.

## How do you match speakers to amp wattage?

Generally you should pick an amplifier that can deliver power equal to twice the speaker’s program/continuous power rating. This means that a speaker with a “nominal impedance” of 8 ohms and a program rating of 350 watts will require an amplifier that can produce 700 watts into an 8 ohm load.

120 volts

## How many volts does a radio use?

So this was all before transistors were readily available. So it was 0 to 100 volts depending on the design. Now Transistorized radios can work on 1.2 to 3, 6, or 9 volts. And of course for cars, many take 12 VDC.