Yamaha NS-777 and NS-555 Speaker System Manual

Polymer-Injected

Mica Microscope Photo

NS-777/NS-555/NS-333/NS-C444

NEW PRODUCT BULLETIN

Flat High-Frequency Directional Characteristics of the Waveguide Horn

Front

40	30	20	10	0	0	10	20	30	40	50
										50

(6 kHz)

Diaphragm Physical Characteristic
	Density	Young’s Ratio	Absorbed Vibration	Acoustic Velocity
	(g/cm3)	(x10 kg4/cm2)	Ratio (tan δ)	(m/sec)
PMD (Polymer-injected Mica	1.15	8.0	0.05	2,620
Diaphram)	1.15	8.0	0.05	2,620
Diaphram)
Polypropylene Sheet	0.9	1.5	0.06	1,300
Pulp	0.46	1.6	0.03	1,870

PMD’s superior characteristics help ensure outstanding sound quality.

In order to effectively reproduce digital sound, speakers must have the following capabilities: wide dynamic range, high efficiency, sensitive response, and high linearity suspension. The PMD used in the EF Series Speakers plays an important role in providing these capabilities. Its strong points are listed in the chart. Density affects the speed of signal transmission and shows the speakers’ excellent linearity. Young’s Ratio represents strength, resulting in high efficiency and sensitive response. Absorbed Vibration Ratio is the value of internal loss; the lower this value, the lower the signal loss, so it also contributes to high efficiency and sensitive response. And finally, Acoustic Velocity represents the overall velocity of signal transmission, an important element in reproducing digital sound. With all these properties, PMD is a material perfectly suited to achieving the highest, most natural sound quality. The goal of digital sound composers is sound creation that permits the reproduction of realistic sound, including dialogue and sound effects, and PMD helps make this possible.

Rear

Conventional Radiation

Waveguide Horn Radiation (NS-777)

High frequency directional characteristics of an installed Waveguide Horn speaker (red lines) and ordinary (blue lines). The Waveguide Horn speaker shows excellent balance in the front direction, with the surround effect to the sides and rear is not adversely affected by reflected sounds.

Shaping and Controlling the

Sound Field

Waveguide Horns differ from conventional speaker horns in that their waveguide features a horizontal control angle of 135° and a vertical control angle of 120°. This allows the sound field to be shaped and controlled for optimal spatial expression in home theater environments. The Waveguide Horn also provides a much smoother frequency response than ordinary horns.

PMD Cone Woofer Makes These

Speakers Ideal for Home Theater

Sound

Home theater speakers must combine high power capabilities with excellent sensitivity and dynamic range, while being designed to prevent listening fatigue. The new EF Series speakers meet these

requirements by using a PMD (Polymer-injected Mica Diaphragm) cone woofer. This diaphragm is composed of 30%

high quality white Indian Pearl Mica, chosen for the significant contribution it makes to sound quality. In order to maximize its distinctive qualities, absolutely no coloring is added to the material. We’ve also varied the cone thickness, making it thicker in the middle, which has been shown to improve performance. The cone is extremely light, yet also tough and durable, with excellent response speed.

High Quality Monster Cable

Extremely high quality wiring, from the well-known Monster Cable Products, is used internally in each speaker to connect the woofer and crossover network.

High Frequency Response Dome

Tweeter

The proven capabilities and

durability of this dome tweeter made

it the ideal choice for these speakers. It can reproduce frequencies up to 35kHz and is powerful. The diffuser over the tweeter helps improve frequency response and directionality.

Bi-Wiring Connection Capability

(NS-777 and NS-555)

Bi-wiring means that instead of connecting the speaker to the amplifier or receiver with two cables (plus and minus), you can use four cables: two for the woofer(s) and two for the tweeter. This decreases modulation distortion for purer sound quality.

Beautiful Yamaha Piano Finish

with Elegant Elliptical Form

As one of the world’s leading piano manufacturers, Yamaha has a long history of wood-working expertise. The EF Series speaker cabinets feature the same luxurious and environmentally fliendly finish as our fine grand

pianos.

3/4 (U)

NS-777/NS-555, NS-333/NS-C444 specifications

The Yamaha NS-777, NS-555, NS-333, and NS-C444 speaker series exemplify Yamaha's commitment to delivering high-quality audio performance and innovative design. Each model is engineered to provide an exceptional listening experience for music enthusiasts and home theater aficionados alike.

The NS-777 is a powerful floor-standing speaker that features a three-way design. It boasts dual 8-inch woofers that produce deep, impactful bass, complemented by a 5-inch midrange driver that ensures clear, natural vocal reproduction. The high frequencies are handled by a 1-inch aluminum dome tweeter, which delivers smooth and accurate sound. With a frequency response that extends down to 30 Hz, the NS-777 is capable of conveying even the lowest notes with clarity and punch.

The NS-555, also a floor-standing model, shares many design elements with the NS-777 but with slightly smaller dimensions. It uses dual 5-inch woofers and a 1-inch tweeter, providing a balanced sound profile ideal for both music and movies. The NS-555 is particularly well-suited for systems where space is a consideration without sacrificing audio quality. Its efficient design allows for placement in a variety of room settings, making it a versatile choice.

For those seeking bookshelf speakers, the NS-333 offers impressive performance in a compact form factor. This two-way speaker features a 5-inch woofer and a 1-inch tweeter, providing a full range of sound that belies its smaller size. The NS-333 is perfect for smaller listening environments, making it an excellent choice for casual listening or as part of a multi-room audio system.

Completing the lineup, the NS-C444 serves as a dedicated center channel speaker. This model utilizes dual 5-inch woofers and a 1-inch tweeter, ensuring that dialogue and sound effects remain clear and distinct in home theater setups. Its design allows it to be easily integrated into various AV configurations, providing a cohesive sound stage that enhances the viewing experience.

All models incorporate Yamaha's advanced technologies, including the use of high-quality MDF enclosures to minimize unwanted resonance. Additionally, the speakers are equipped with precision-tuned ports for improved bass response and overall efficiency. With their refined look and exceptional audio capabilities, the Yamaha NS speaker series stands out as an excellent choice for anyone looking to elevate their audio experience.