just tried more or less, what you said, it is complicated due to the disposition of the living room/kitchen. But I kind off put them with 1 metre and half behind and 1 metre and half left side wall one, 2.5 metres aprox side the other one. Boom effect is lower, the curious thing is that on listening position just I will say 1.5m max from them the boom it is very low, but if you stand up is notorious. Lower volume helps a lot and the type of music aswell, the boom effect was anoying with Alive 2007 from daft punk, with very predominant low ends. My main query, taking in consideration that at lower volumes they shine, would a amp with more watts do any better, or just worse? Maybe one more transparent than the cambridge will improve the experience at lower volumes, say rega elex-r that I was previously interested, arcam29, marantz pm8005, abrahamnsen, naim si5.