Which amp would you use?

Hi there,

I think this is kind of an interesting way of doing this. I am installing a Hertz Mille Pro 6.5 (mpk 165.3, 4 ohm) component set-up into my 4runner and I need to pick an amp from my existing stash. I took the backs off all three amps and was surprised at what I saw. I guess largely because I do not know exactly what I am looking at sans the caps and power supplies.

Can you help me pick one on 3 criteria (just for fun)?
1 - Based on looks of the internals?
2 - Based on the specs?
3 - Knowing all what would you yourself actually run?

I will be using the hertz crossovers and may think about going active in the far future since I have the amps.

The three amps are:

Crossfire CFA 142 (35 watts x 2, 4 ohms).

RockFord Punch 100.2 Gold Cap (50 watts x 2, 4 ohms)

MTX Thunder TA404 (35 watts x 4, 4 ohms. Bridged: 140 watts x 2 4ohms.
This is amp is brand new (old stock) btw, I just pulled it out of the plastic, if that matters.

Thanks!
 

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No commercially built amp, in good working order, has a distortion that can be heard. Some have better equalization and better crossovers but the only distortion that you'll have is clipping. The higher power amps will prevent clipping better than the lower power amps.

And before you say that you never drive your amps to clipping, if you don't, you are the only one on the planet, except for those who only listen to golf games, AM radio talk shows or PBS.
 
For mids and highs a simple selectable high pass filter is usually enough. All of the amps you listed have one but with slightly different crossover points, 80, 85 and 120 I believe. My preference is an adjustable crossover because there is no one crossover point that is best for every system.
 
The symmetrical layout of the Rockford is more pleasing.

Being a curious person, I would have no choice other than using each one for a while to compare. If you've already got them, there's no better way to make an assessment. More fun, too.