NS-555
NS-555
1420 d3-Way Bass-Reflex Tower Speaker System. 
The EF (Elliptical Form) Series feature Waveguide horns, PMD (Polymer-injected Mica Diaphragm) woofers and highest quality internal Monster Cable wiring for total enjoyment of digital movie sound and music sources, plus elegant Yamaha traditional piano finish cabinets.
| Type | 3-Way, 4-Speaker Bass-Reflex Floor-Standing Speaker System | 
| Woofers | Dual 16cm PMD cone | 
| MidRange Driver | 13cm cone with Waveguide horn | 
| Tweeter | 2.5cm aluminium dome with Waveguide horn | 
| Frequency Response | 35 Hz-35 kHz | 
| Nominal Input Power | 100 W | 
| Maximum Input Power | 250 W | 
| Sensitivity | 88 dB/2.83 V/1 m | 
| Crossover Frequencies | 1 kHz/4 kHz | 
| Impedance | 6 ohms | 
| Dimensions (W x H x D) | 222 x 980 x 345 mm | 
| Weight | 20 kg |