Who makes an active speaker that isn't ported?

Gregm - you're correct there are XO's in active speakers. What I meant to say is... well, precisely what you pointed out. My mistake.

Cinematic Systems... I thought ATC's were ported in the front. What multi-driver model is not ported?

The ports are not a bass alignment, they are to release pressure from the cabinet under high SPL conditions, same with the Meyer Sound reference monitors.

So they are ported but not to extend bass frequencies.

For whatever it is worth, the best vehicle sound I have ever heard is with a six speaker system (Infinity) with ten watt amps with each speaker.

ports are not a bass alignment, they are to release pressure from the cabinet

Are you saying the ports don't contribute to the/any sound? Do you know anything about this? If so, care to expand? Cheers

DB,

One more name to your list (a name who has perhaps been a pioneer in this active loudspeaker technique):
Boothroyd-Stuart Meridian's DSP8000

AFAIK, this active speaker is a sealed box (atleast reading the info posted on their website)
http://www.meridian-audio.com/p_d8k.htm