NHT SuperZero 2.0 Mini Monitor Speaker (Gloss Black, Single) (Discontinued by Manufacturer) Acoustic suspension - . system use the trapped air to control and damp the speaker movement like shocks on a car. Mini form factor keeps box resonance down and make speaker disappear. Phase Perfect Corssover - the 2nd order crossover is phase perfect and 1k lower than the original SuperZero for smoother response Wireless sub option uses USB input for both power and signal input - no jumpers needed.