A few things can help immensely: a) Vibration control devices betweenn speakers and stand. Walker Points I use are excellent. Marigo dots as explained above; b) increase current to your amp. The new copper FatBoys from Electraglide are bass "oriented" c) modify crossover; d) change speakers: e.g. Audio Vienna, "Mozart", Sonus Faber "Grand Piano" Impact new speakers (see their web site)
