How many watts do I need on an amp?

Question

i have a 2002 grand cherokee and wana no sumthin about amps

front speakers have these specs:
» 2-way crossover network (4,000 Hz, 12 dB/octave)
» frequency response: 40-23,000 Hz
» recommended power range: 10-100 watts RMS (300 watts peak power)
» sensitivity: 92 dB

rear door speakers have these specs:
» 2-way external crossover network (18 dB/octave, 3,500 Hz high-pass and low-pass)
» power range: 2-75 watts RMS (225 watts peak power)
» frequency response: 67-21,000 Hz
» sensitivity: 91 dB

subwoofers have these specs:
frequency response 25-400 Hz
recommended power range 80-600 watts RMS (300 watts per woofer)
peak power 1200 watts
sensitivity 93 dB

i dont no wat requirements i would need for my amp

Answer 1

Speaker power is not as useful as know what your amplifiers use.

But P=AV, P is power, A is amps and V is voltage. The problem is the speaker voltage is modulated to make the sound. The amplifiers will have V fixed, I expect 13.5 volts. The current may be specified for a maximum load so if your speakers are a maximum load you can use this.

However, using the formula putting in the RMS of the woofer

600 = AV, if V is 13.5

600 = 13.5A

Divide both sides by 13.5

A = 44.4 so that's how many amps for the woofer which does not include waste in the amplifier so I would ads about 10% for this and you get about 50 amps. I think you can read the amps off the amp input side, they must state them.

Front 100 Watts

100 = 13.5A so this is 7 amps + waste say 8 amps but multiply by 2 for stereo.

Rear 5.5 say 6

so we have 16+12+50 = 78AMPS at the alternator for sound.

Make sure this does not hurt your gonads.

Answer 2

your full range speekers should have a 400 watt 4 channel 100 watt peek per channel.
your subs 1600 watt 2 channel 800 peek per channel
This is to get the best sound without slowly damaging your speakers from high power.
However you want your amp to match your speakers. The car audio world is hard to decifer from. If you have cheap speakers, a good amp of this size could blow them within seconds. best to go with the same make and model unless you know what is compatable.

Answer 3

i would go with two amps one for the front and the doors maybe a small kicker or mtx 4 channel and in the back or subs i would go with a driver 2 channel with at least 500 watts rmswith a remote bass control so you could tune it with out haveing to go to the amp everytime to adjust the bass..

Answer 4

your going to need at least an 800 watt amp, but the higher you go the better it ll be.

Answer 5

A M P = 2pts!