Well, both the Wellbrooks I’m looking at are active. The only difference is that one uses a coax loop and the other one has a rigid loop, and what’s inside that I don’t know.
The Wellbrook website is confusing since it shows lots of discontinued models.
And the comparison chart Says the ALA1530LN is passive while the landing page says it’s active.
Plus I emailed them and got no answer which is why I’m posting here.
It’s really a terribly confusing website.