Originally Posted by Newbie01
Cross Over matters a ton more than the driver itself.
Actually, assuming a competent crossover design such that each driver is operating well within its ideal range with appropriate filter slopes, the sound quality of the tweeter itself is probably the most critical component as it covers the greatest frequency range, from upper mids through beyond human hearing. No passive or active crossover or EQ, no matter the design, will ever make a dome tweeter sound like a RAAL true ribbon or even a soft dome tweeter sound like a metal dome tweeter. Transient characteristics, various distortions, resonances, dispersion are all highly influential on sound quality and these aspects are essentially unchanged by crossover design. This is precisely why you can have two tweeters with the exact same frequency response sound completely different from one another...
That stated, all aspects of a loudspeaker -- from the cabinet, to the drivers, to driver layout, cabinet tuning and damping effect overall sound quality.
I have heard the SBS-01 speakers and while the tweeters they use do not sound like any of our various custom SEAS models, I think they would be decent as surrounds provided they are located fairly close to the listener due to their low efficiency. However, keep in mind that you will need a ton of power in your rear channel if you intend to at least come close to matching the dynamics of the front speakers.