FYI, the Zu Cubes have the concentric tweeters, not the Omen Bookshelf. There are a few folks on here who run Cubes if you search the forum.
I haven't heard Omen bookshelf but I do have Omen DW's which I love. I would imagine the bookshelf version gives a very big sound like the full size Omens minus the bass extension that the Zu Griewe cabinet loading gives.
My Zu DefHeads are also sealed cabinets rated down to 50hz just like Omen bookshelf. They sound huge and I don't ever feel the need for a subwoofer for them.
I haven't heard Omen bookshelf but I do have Omen DW's which I love. I would imagine the bookshelf version gives a very big sound like the full size Omens minus the bass extension that the Zu Griewe cabinet loading gives.
My Zu DefHeads are also sealed cabinets rated down to 50hz just like Omen bookshelf. They sound huge and I don't ever feel the need for a subwoofer for them.