Speakers with their own amps


Was just wondering,

Are there speakers out there that have their own amps to drive the whole speaker?
Not just internal amps to drive the subs but also amps to drive midrange & treble.

I see 2 advantages to this.
1. One could drive the speakers with just a preamp avoiding the cost of amp/amps.
2. Would allow the designer to voice the speaker to their design and how they wanted them to sound.

Would probably still allow the consumer to balance their systems sound, to one's liking, via a preamp, processor, cabling, etc.

I have the ability to drive my speakers from my preamp leaving my amp to drive the mids & highs.
I've come to like this option.

Thoughts?
joysjane
This was the feedback I got from Ayon. They implement no negative feedback and as a result, there was quite an audible noise from the Ayon as a preamp when I used the Solo. Using a SS preamp fixed that.
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The buzzing was apparently a result of lack of negative feedback and impedance and not just an impedance mismatch issue. Impedance mismatch would normally just give you a rolled off frequency response.
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They are nice if you don't care about being locked into the amps that come with them!