i have heard a few in halfords, and fli was crap lol, even my mates agreed lol iirc even sony xplod sounded better.
I work in Halfords - you can't tell what a sub sounds like in Halfords in our Audio Boards mate, their free to air behind them not enclosed so you'll never get their true sound. In the odd board there is an enclosed space but it isn't the right volume for the sub.
Ask anyone who does REAL installs, and they'll tell you the Fli is better than any 'package' you can buy for under £200 in Halfords... especially their own subs. Fli is just a brand of vibe, no less quality.
Another big part that plays in how good they sound is how they are set up, filters, gains etc. if it's not done properly it'll sound crap. My Fli sounded better than my mates £600 worth of install because he didn't have it set up properly - now obviously his sounds better.
Again another big part is the bit rate of the music, if you get bad quality music you get bad quality sound. Get good quality music 320kb/s + you'll get good sound. The only way to compare is to put them all in the same car, with the same headunit, and the same settings and the same music!!!
Chaos has heared my Fli what did you think?
Secondly:
Having a sub does not mean your a Chav, especially a Fli. Do I look like a Chav?with a chavvy fli sub