alper_yilmaz
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Hi MMac,
I am almost positive that even the lowest-output Decware amp would work quite fine with your Omen's unless you are looking for crazy levels of volume. I am driving 91dB B&W's with my SE84UFO. The B&W's I have are a 2.5-way system with a crossover that must be soaking most of the signal and still sound satisfactory in terms of volume. I am not sure, though, if mine are the 4-ohm or the 8-ohm version.
Also, please note that there is so much detail you will hear from the Decware/Zu combination that you might not even need high volumes; i.e. your listening habits might even change...
If I were in your position, I would start with a version of the SE84UFO. These have amazing second-hand value actually, so if you are not satisfied you can always sell them at a great price anyway. I would not go for any passive or active sub at this time either. Just buy the SE84, feed it with a high-output source; I would say at least with 4-5 volts (by the way, this is not based on any actual measuring, but rather my experience with low-wattage Decware amps in general). If the bass is not satisfactory, you can look into some mechanical coupling through the placement of your speakers. You might end up with some boomy bass, but again, there is no recipe for this that I know of; it is just trial and error.
If you cannot get decent bass from your Omen's this way, I do not think it is the amp, but rather the speakers; and increasing the power of the amp would help just a bit, but not a lot. This is based on my experience with my Omega Hoyt-Bedfords with moving from an SE34I.2+ to a TORII mkII (from 4-5 watts/ch into 25-26 watts).
With any Decware amp, I believe you won't be disappointed. It is more the other components in your system that might give you headache, but at least Decware has amazing second-hand value, so I believe it is a safe investment.
If the above does not satisfy you, then you should start considering passive subs, etc... But one step at a time... IMO and IME... :)
Best,
Alper
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