[Viffermike]

As many Etons are, these are highly unusual speakers plainly designed for two overarching goals:
- Ease of installation using OEM wiring, plugs, and power
- Ease of integration with aftermarket power solutions

Note three things in the image of the coaxials:

1). As pbb911 notes, it has dual female plugs for BMW's proprietary male wiring plugs. However, There's no real point for a 'daisy chain' plug like the components have because the speakers are not physically separated. I believe the second plug is simply a 'convenience' plug to daisy chain in a third speaker, or use the array in a system already set up as components.

2). The wires on the rim of the basket. For each female plug, one lead goes to the midrange's voice coil, and the other goes to the tweeter through the midrange's cone. This is proof that each speaker receives a full-range signal.

3). Those wires are also proof that there is no built-in crossover like the vast majority of coaxials have. Eton (and, more frequently, other aftermarket coaxial makers) do this on purpose because so many aftermarket amp/DSP solutions have active crossover networks that work far, far better than passive in-speaker solutions.

I would not run these speakers without a crossover in any application.

By the way, Eton misrepresents its 'crossovers'. Crossovers, by definition, are dual-band: they start to cut output at a certain frequency, then start to allow output at another, higher frequency -- hence the term 'crossover'. Eton's unit are actually high-pass filters ONLY. The one recommended for these coaxials cuts at 150Hz. That means that unless there is a second passive high-pass filter somewhere in the coaxial's construction that takes out frequencies between 150Hz and, 2-3Khz (very possible, but I see no evidence of that in the speakers' images), the tweeters are getting a near-full-range signal, too. That is NOT good.

I've heard a couple of Eton sets personally. They're an improvement over OEM, to be sure, but there are better choices out there. Just because they're 'hand-made in Germany' doesn't mean they're the best choice -- in fact, I'd argue that they are likely more middle-of-the-road at Etons' price point because the price includes a higher margin than normal for two things:
- the higher cost of labor
- the convenience of installation and use