I have recently had 4 x JL TR600-XS fitted to my car. The Sound Gallery in High wycombe fitted them so I don't know how easy they were to fit, but they do fit in the standard door enclosures. One piece of advice though, when they were first fitted they sounded dull and lifeless. I was told they would take a couple of weeks to bed in, and they did. they sounded much better after fitting a seperate amp though. The head unit (Sony XRC7200R) has a nominal 4 x 40 watt output, but the difference with a seperate amp was brilliant. I also had a bass box fitted in the boot and that certainly helped.
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