So far superb!
Crutchfield Customer Review (What's this?)
I was unable to install these myself, not having any cutting tools took them to a local custom shop. They were amazed at these speakers, asked me many questions. At this time they are hooked up to the stock Ford head unit which uses them as subs only. Next phase is to install a proper head unit (Pioneer Stage 4 or 3) to run them full range. Even though I have less 'power' (stock deck speakers were 2 ohm) the pitch definition is a world apart from the el cheepo stock philco subs (and I use that term losely). I listen to a mix of NIN, Metalica, Motorhead, late romantic period french organ music and Wagnerian Opera. Can hardly wait until I change and am able to run them full range! I recommend staying away from the cheaper Focal lines. Step up and purchase the upper lines, you'll have no regrets.
Pros: Worth every penny, much better low frequency overtone definition. Before there was just a fat bloated sound with no ability to make out specific pedal notes or stop changes. Now there is more than a hint. The only limiting factor is the front end. And that is only temporary.
Cons: Very large, not an easy install, expensive and no longer made/imported.