Breakbeat,
That's totally up to you and your specific needs...but if it was me, no I would not use a sub with the Omen Def's. But that's only because of my 2 channel direct music listening...I don't "need" a sub with the the full range Def's.
If I was 2 channel music direct with the Noesis, then I have to have a sub...no way around it.
The Def's for movies?, then of course use a sub.
That's totally up to you and your specific needs...but if it was me, no I would not use a sub with the Omen Def's. But that's only because of my 2 channel direct music listening...I don't "need" a sub with the the full range Def's.
If I was 2 channel music direct with the Noesis, then I have to have a sub...no way around it.
The Def's for movies?, then of course use a sub.