i have heard the w6 in person in a store but they still sound better than my mb quart pwe 354
oh i have a raa 1000 amp its good to me i havent had that many experiance car audio though get the amp its worth it but as for a sub i would get a RE SX thats what i want
the quart is a great amp. the jl offers a lot of tuning functions that are needless imo. you'd be paying a lot more for no reason at all. the amp turns volts into watts. if that's what you want out of an amp, the quart and numerous others will do it well for a fair price. power supply is key. particularly when you are speaking on subs, not much else really matters (as far as audible sound is concerned). further, the quart is slightly underrated.
but they still sound better than my mb quart pwe 354