I finally found something that works and sounds very good at the same time. They are Yamamoto PB 10 footers.
See reviewers comments in http://6moons.com/audioreviews/yamamoto3/footers.html
They are sold in the US by www.venushifi.com and in Europe by www.jacmusic.com at $35 per set of 4.
See reviewers comments in http://6moons.com/audioreviews/yamamoto3/footers.html
They are sold in the US by www.venushifi.com and in Europe by www.jacmusic.com at $35 per set of 4.