Used for ten years, as in hi-fi home theater, the least we can say is that they produce a sound of a substantial scale. Being equipped with two HP low amplified by an amplifier 130 watts, they are content with average power amplifiers. I started feeding them with an amplifier Onkyo A-9711 of 80 watts, enough for listening to a very respectable volume. When I went to the home theater, then I have fed with a Denon AVR-2105 amp good enough, too (two B & W DM-301 rear speakers). I love the bass very strong and powerful and it goes easily from a box in HC. They can be put into multi-amplification as serious HP may have their own separate entrance. Paid 1830 euros a pair, I find the quality / price / potential ratio. I did not take long to choose: I "cracked" from me to have them heard. I would do the same choice without hesitation, but maybe in 10 years, it was better for the same price?