Yamaha NS-333/NS-C444 Product Bulletin

Also see for NS-333: Product catalog Owner's manual Owner's manual Owner's manual

3/4 (U)NS-777/NS-555/NS-333/NS-C444NEW PRODUCT BULLETINit the ideal choice for thesespeakers. It can reproducefrequencies up to 35kHz and ispowerful. The diffuser over thetweeter helps improve frequencyresponse and directionality.Bi-Wiring Connection Capability(NS-777 and NS-555)Bi-wiring means that instead ofconnecting the speaker to theamplifier or receiver with two cables(plus and minus), you can use fourcables: two for the woofer(s) and twofor the tweeter. This decreasesmodulation distortion for purer soundquality.Beautiful Yamaha Piano Finishwith Elegant Elliptical FormAs one of the world’s leading pianomanufacturers, Yamaha has a longhistory of wood-working expertise.The EF Series speaker cabinetsfeature the same luxurious andenvironmentally fliendly finish as ourfine grandpianos.requirements byusing a PMD(Polymer-injectedMica Diaphragm)cone woofer. Thisdiaphragm iscomposed of 30%high quality white Indian Pearl Mica,chosen for the significantcontribution it makes to soundquality. In order to maximize itsdistinctive qualities, absolutely nocoloring is added to the material.We’ve also varied the conethickness, making it thicker in themiddle, which has been shown toimprove performance. The cone isextremely light, yet also tough anddurable, with excellent responsespeed.High Quality Monster CableExtremely high quality wiring, fromthe well-known Monster CableProducts, is used internally in eachspeaker to connect the woofer andcrossover network.High Frequency Response DomeTweeterThe proven capabilities anddurability of this dome tweeter madeShaping and Controlling theSound FieldWaveguide Horns differ fromconventional speaker horns in thattheir waveguide features a horizontalcontrol angle of 135° and a verticalcontrol angle of 120°. This allows thesound field to be shaped andcontrolled for optimal spatialexpression in home theaterenvironments. The Waveguide Hornalso provides a much smootherfrequency response than ordinaryhorns.PMD Cone Woofer Makes TheseSpeakers Ideal for Home TheaterSoundHome theater speakers mustcombine high power capabilities withexcellent sensitivity and dynamicrange, while being designed toprevent listening fatigue. The new EFSeries speakers meet theseDiaphragm Physical CharacteristicDensity Young’s Ratio Absorbed Vibration Acoustic Velocity(g/cm3 ) (x10 kg4/cm2) Ratio (tan δ) (m/sec)PMD (Polymer-injected MicaDiaphram)Polypropylene Sheet 0.9 1.5 0.06 1,300Pulp 0.46 1.6 0.03 1,8701.15 8.0 0.05 2,620PMD’s superior characteristics help ensure outstanding sound quality.In order to effectively reproduce digital sound, speakers must have the following capabilities: wide dynamicrange, high efficiency, sensitive response, and high linearity suspension. The PMD used in the EF SeriesSpeakers plays an important role in providing these capabilities. Its strong points are listed in the chart. Densityaffects the speed of signal transmission and shows the speakers’ excellent linearity. Young’s Ratio representsstrength, resulting in high efficiency and sensitive response. Absorbed Vibration Ratio is the value of internalloss; the lower this value, the lower the signal loss, so it also contributes to high efficiency and sensitiveresponse. And finally, Acoustic Velocity represents the overall velocity of signal transmission, an importantelement in reproducing digital sound. With all these properties, PMD is a material perfectly suited to achievingthe highest, most natural sound quality. The goal of digital sound composers is sound creation that permits thereproduction of realistic sound, including dialogue and sound effects, and PMD helps make this possible.Polymer-InjectedMica MicroscopePhoto50 40 20 1040 20 10 0 03030(6 kHz)FrontRearFlat High-Frequency DirectionalCharacteristics of the Waveguide HornConventional RadiationWaveguide Horn Radiation (NS-777)High frequency directional characteristics of aninstalled Waveguide Horn speaker (red lines)and ordinary (blue lines). The Waveguide Hornspeaker shows excellent balance in the frontdirection, with the surround effect to the sidesand rear is not adversely affected by reflectedsounds.

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