This owner's manual provides guidance on setting up the Yamaha NS-625 and NS-645 Natural Sound speaker systems. It details optimal placement to avoid resonance and feedback from record players or glass surfaces, ensuring speakers are level with the listener's ears.
The document also covers connection procedures for linking the speakers to an amplifier using color-coded terminals (red for +, black for -) to maintain proper polarity. It includes specific recommendations for selecting a compatible amplifier based on power handling and impedance requirements.
| Frequency response (NS-645) | 40—20,000Hz |
|---|---|
| Power handling capacity (NS-645) | ~ 7 A d Nominal Impedance 4 4 acousti c conditions |
| Nominal impedance | 4 ohms |
| Woofer size (NS-645) | 250mm cone |
| Woofer size (NS-625) | 200mm cone |
| Crossover frequency | 2,000Hz |
| Dimensions (HxWxD) NS-645 | 540mm x 300mm x 259mm |
| Weight NS-645 | 14.6kg (32.1 Ibs.) |
The speakers should be used with an amplifier that has at least 20W output power.
The NS speaker terminals are color coded, with red for (+) and black for (—).
No, surfaces such as glass should be avoided.