I have a Helos20, but it's not hooked up yet (waiting until I move in a few months). One advantage the 20 has over the 100 is that it can be used as a stereo speaker, which I think makes it ideal for rears. I plan on getting another so I can run 7.1.
I have Helos 100's as rears. They work fine for me. Aim them properly. Also, there is a setting choice to be made for a narrowly defined listening area, or wide. The narrow is REALLY narrow, but the wide works great.
These are coupled with ML Voyage fronts, and ML Passage center.
My AV receiver has Audessy, which is a wonderful invention. But because of this I really am not sure how hard that tuning is pushing the edges of the speakers themselves. All I can say is the final result is very pleasing.
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