Brand new in factory sealed box! One Synergistic Research Black Box in white color. Retail price is 1.995 euro, now for 1.749 euro only! Free shipping in Europe! There is no other compact acoustic treatment device that you can place in your listening room to solve your low-frequency problems except the Synergistic Research Black Box. Based on our award-winning and patented sympathetic resonance technology, the Black Box is an (all in one) Broad Spectrum Low-Frequency Resonator Array with UEF Tech that effectively eliminates bass nodes while expanding your room’s ability to accurately portray low-frequency information and spacial content. Working from the principle that all frequencies in the audible bandwidth are linked through harmonics, the Black Box balances low frequencies, mid-range, and high frequencies through a mathematically derived algorithm based on tuned sympathetic resonance. So when you get the phase correct at 20Hz for example, it clears up every multiple of 20Hz so, 40Hz, 80Hz, 160Hz and on. Even if you don’t have a bass problem in your listening room you can benefit from the Black Box. With improved low frequency definition in perfect phase alignment with all frequencies that make up your favorite music you hear natural sounding bass in a holographic sound stage with mid’s and high’s that sound natural and transparent. And unlike large bass traps, the Black Box performs this feature in a small, aesthetically pleasing package. The Black Box sits on 3 stiletto spikes decoupling it from your floor for improved response. Placement: best way to place a Black Box is to find where the bass is building up. This is usually near a wall. If you go around the room where the wall meets the floor, with your ear a foot or two from the ground and you will get an idea where the bass build up is. Then try the Black Box in those locations to see what placement is effecting the music most beneficially.