In 4000, your best best would be JBL 608C. They have enough thump to be run without an amp. The XO have setting for treble control of 0db for a bit brighter sound and -6db for laid back sound. The drivers are solidly built and give enough bass. Moreover since you are not running an amp, so run the 608C on full range rather than HPFing them. This would churn out even more bass.
One suggestion though. Install components in front doors and not anywhere in rear (rear doors/tray) for best sound stage.
freakdude.
One suggestion though. Install components in front doors and not anywhere in rear (rear doors/tray) for best sound stage.
freakdude.