Originally posted by 97teg
If you are looking at the same price range then yes you can compair the arc 4050 to the jl 300/4. If i was gonna compare amps in power i would say put the zapco c2k 2.5 up against the arc. The zapco is much more expensive but its the same power. It depends waht you are comparing.
I just selected that amp because I'm familiar with it, and it's in the correct power range - I wasn't trying to say that the JL or Arc were better for the money. For example, I used to own a RF 600a4 - got it for around $250, it was rated as follows:
75x4 @ 4 ohm
300 x 2 @ 4 ohm mono
It benched at 840W+ total power
So, once again, when you look at rated power, you have your "typical" amp making double the rated power when bridged then the JL.
I usally go by a price range and what i can get for that amount of money.
It boiled down to me explaining why I feel you get "cheated" when you use a JL - it had nothing to do with pricing. I agree though that usually (when dealing with a budget) comparing products by price point is a good way to go.
Im sure almost every reputable manufacturer worth anything underrates their amps including jl and arc. For this guys purposes he is not runnig horns. Also 2 ohm mids are nice but don't seem to be very common either. Since they are fairly rare it doesn't makes sence to make an amp for them.
No one "makes" an amp to run 2 ohm mids, but it is nice for those of us who do use them - it's especially nice for those who like to run multiple dedicated midbass drivers (or DVC drivers) in their doors to get a good power bump.
I agree that some amps are better suited for some jobs than other. If youa re gonna run the sub bridged then i don't think the 30 extra watts is going to make a difference.
I'd consider a 20% increase pretty significant
For this guys system I wouldn't think the 300/4 would be a bad amp. If he was gonna run your setup i would go with another amp. By looking at the stuff in your sig i can tell you really know what your talking about so ill stop 
What I run in my sig doesn't mean we can't have a friendly discussion about it
You are making some great points, and I think JL makes a great product....I think they are in the top 5 companies that I would consider building an enitre system with one manufacturer with.
I guess what I should say is that you can't go wrong with it, I just think you can do better.