Loudspeakers
| Woofer |
Y |
| Woofer diameter (imperial) |
5.5 " |
| Tweeter diameter |
1 " |
| Mid-range driver diameter (imperial) |
5 " |
| Number of drivers |
4 |
| Number of speakers |
2 |
| Amplifier |
Built-in |
| Tweeter |
Y |
| Recommended usage |
Universal |
| Mid-range driver diameter |
130 mm |
| Woofer diameter |
160 mm |
| Tweeter diameter |
30 mm |
Audio
| Crossover frequency |
450 Hz |
| Sensitivity |
89 dB |
| Frequency range |
32 - 50000 Hz |
| Impedance |
6 Ω |
Additionally
| Wireless technologies |
Wired |
NS-F901, 3-Way, Bass-Reflex, Floor-Standing, 32 Hz-50 kHz, 200W, 89dB, 6ohms, 30.7kg
- Soavo Concept: Delivering Natural Sound
- New A-PMD Midrange reproduces high resolution sources with richly clear detailed sound
- New A-PMD Woofer provides low range reproduction with abundant power and responsiveness
- Aluminum dome tweeter with DC-Diaphragm™ with neodymium magnet
- Innovative cabinet design (non-parallel surfaces)
- Three-way mitered-joint construction
- Two-chamber cabinet (woofer and midrange separated by slanted partition) with vertical bracing
- Highest quality parts including Solen capacitors in the networks
- Graceful appearance designed by Toshiyuki Kita
The NS-901 Series adopts Yamaha’s unique new A-PMD (Advanced Polymer-injected Mica Diaphragm) with improved cone paper in order to reproduce high resolution sound sources. Taking advantage of the strong points of the A-PMD—extreme lightness, rigidity and stability—the speaker achieves smoothness, very fast response, and sound with good dissemination, reproducing information-rich sound sources with an impressive feeling of density. The A-PMD incorporates a powerful magnetic circuit with a large neodymium magnet and a highly stiff aluminum diecast frame that increases the aperture ratio, achieving outstanding power handling and responsiveness in the mid frequency range, the heart of the music. The rubber surround, a spider made by Kurt Müller of Germany and meticulous tuning also contribute to the reproduction of high quality music and movie sound.
The bass unit also adopts the new A-PMD with a paper cone upgraded for the reproduction of high resolution sound. The use of a large ferrite non-shielded magnet ensures high drive power that provides prodigious bass volume. By utilizing high quality parts such as a high rigidity aluminum diecast frame that dampens resonance, it reproduces bass with a deep sense of scale, achieving both power and speed, leaking out of the speaker cone. This means the full power of the waves is forced out through the air port, resulting in clear, powerful bass.
