If you plug in a cable from the KPA to the K2 speaker jack, then the KPA speaker is activated; otherwise, it is the K2 speaker. 73, Lyle KK7P > Hi folks - When the KA100 amp is used in the EC2 enclosure and connected > to a standard K2 - is the K2 speaker the speaker that is activated - or > the speaker in the amp? 73/Tim NZ7C