these are the speakers i am going with.... next i need to choose a 4 channel amp... now i want one that doesnt put the max rms watts but close to the max right? otherwise i would be blowing them?... a little help would be great!

4x6- Infinity Kappa, 462.7cfp
Power Handling, RMS: 60 watts
Power Handling, Peak: 180 watts
Frequency Response: 75Hz - 21kHz
Sensitivity: 94dB
Impedance: 2 Ohms

6x9- Infinity Kappa 692.7i
Power Handling, RMS: 110 Watts
Power Handling, Peak: 310 Watts
Frequency Response: 35Hz - 25kHz
Sensitivity: 95dB
Impedance: 2 Ohms

 

anyone???

 

RMS power ratings for speakers are virtually worthless. I guarantee that if you fed 100 watts of rap music into those 6x9s they'd die a very fast death.

A good brand name (i.e. not Audiobahn or Boss or any of that crap) 50x4 amp will work very well for you. Anything from Alpine, Kicker, Rockford, etc will be suitable.

 

good thing i wont ever be feeding it that rap crap lol and yea i was lookin at amps for around 50 watts of power but i see a lot with 60 and i dont wanna max out the 2 4x6's

 

which would be better
this kicker
KICKER ZX200.4 ZX Series 4Ch. 200W Amplifier AMP
RMS Power @ 4ohm stereo: 35Wx4
RMS Power @ 2ohm stereo: 50Wx4
RMS Power @ 4ohm mono: 100Wx2

or this alpine
ALPINE MRP-F250 4/3/2 CHANNEL POWER AMPLIFIER 200W MAX
Power Output: RMS Continuous Power (@14.4V, 20 Hz to 20 kHz CEA2006)
Per channel into 4 ohms (1% THD): 40W X 4
Per channel into 2 ohms (1% THD): 50W X 4
Bridged into 4 ohms (1% THD): 100W X 2

 

Personally I prefer Kicker, but others may prefer Alpine. Either will work well for you, though I suspect that the kicker is the more powerful of the two dispite their ratings. I haven't met a kicker amp yet that didn't significantly exceed their rated power.

As for those 4x6s, you'll beat the hell out of them no matter what amp you choose if you don't filter the bass out of them. Most head units now allow you to high-pass the output, and if yours allows that, use it. High-pass those 4x6s at around 120hz and see how they do. IF you still bottom them, move the high pass up to 150hz. Using that high pass will prevent you from letting out all the smoke.

 

Neither-your're going to be running 4 speakers at 4 ohms, so at best you will have 40 watts to each speaker. A good deck will put put about 25 rms x 4. That extra 15 watts won't make much difference in db Neither amp is going to make your ears bleed. I have 4*6 kappa's and a 4*6 reference component set in an s10 being powered by a kicker kx350 x2. Each pair of speaker is getting 87.5 watts. It is loud to the point where you can't listen full blast more than an few minutes, but the amp will struggle supplying power for bass heavy songs. How much do you want to spend? If you are on a budget and don't mind giving up fading capabilities, a two channel is cheaper and most will let you run them at 2 ohms stereo.
http://http://www.woofersetc.com/index.cfm?fuseaction=product.display&Product_ID=3180
http://http://www.woofersetc.com/index.cfm?fuseaction=product.display&Product_ID=3807
If you want to stay with infinity:
http://http://www.woofersetc.com/index.cfm?fuseaction=product.display&Product_ID=2959

 

There is a 1000 times greater chance of blowing speakers from being under powered than overpowered. If you your amp is cranked and you turn up the volume, it will begin "clipping"; which is basically when the signal causes the speaker to dwell at the top of the excursion with current running to it. This will overheat the voice coil and blow it.

 

Regardless of what head units claim for output, they don't make anywhere NEAR the power that a modest 4 channel amp will. A 40x4 amp will be significantly louder than any head unit, with the exception of maybe a head unit that's using a new style digital amp, but I don't know of anybody doing that yet.
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Not exactly. While you certainly don't want to clip your output, when dealing with dinky speakers like 4x6s, it's not too common to clip them to death. Good old fashioned overpowering due to feeding them a full range signal is the most common cause of death on little speakers like that. Those little speakers with their little voice coils can't handle a lot of power, and when you start pumping a full range signal into them, the constant power from the bass cooks the coils or causes mechanical damage from overexcursion.