Yamaha DVX-S150 Productcatalogus - Pagina 28

Blader online of download pdf Productcatalogus voor {categorie_naam} Yamaha DVX-S150. Yamaha DVX-S150 44 pagina's. Digital home theater component, digital sound projector, digital audio server, digital audio terminal, optional speaker system, plasma display monitor, digital cinema projector, digital home theatre receiver, dvd player, dvd changer, home theatre speaker

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PMD Cone Woofer Uses Advanced Technology

and Materials (515 PMD, 225 PMD and PMD

Series)

Digital Home Cinema Speakers

feature a unique Polymer-

injected Mica Diaphragm (PMD).

The diaphragm is composed of

30% top-quality white Indian

Pearl Mica, chosen for the

amazing contribution it makes to

sound quality. In order to

maximise its distinctive qualities, absolutely no

colouring is added to the material, and the cone's

shape, produced by injection moulding, is a natural

catenary curve. Extremely lightweight, it achieves

good stiffness along with ideal internal loss and a

high modules of elasticity.

WSD Cone Midrange and Woofer (HX Series)

Yamaha's White Spruce Diaphragm (WSD) material

emerged from an intensive search for a light, tough

diaphragm material that would help us achieve

ideal home cinema sound. The pulp material used

for the WSD is manufactured almost entirely from

long fibres of Canadian evergreen white spruce, the

world's lightest single-sheet diaphragm material.

How Yamaha achieves our "ideal" sound.

The key to achieving the purest, most natural, and most

pleasing sound is balance. Balance among the above

three elements, balance among all the components

that make up the speaker, and balance among

subjective listening judgments.

Testing and More Testing

Yamaha tests speakers in various ways, both before and

after production. Each part of the speaker, be it a coil,

a capacitor, or a cabinet, is selected out of many

alternatives, which may be tested for months before a

Digital Home Theatre Speakers

A wide range of speakers for every type of home theatre system

As high-quality home theatres have become more popular, Yamaha has created high-performance speakers

to match. These speakers are characterised by their robustness and dynamism in the reproduction of the

current multi-channel sound standard and offer the music lover a pleasant musical sound. Thanks to its

own patented technologies, such as Advanced YST or QD Bass, Yamaha subwoofers offer powerful and

precise bass reproduction from robust housings with compact dimensions.

Waveguide Horn (HX Series and EF Series)

When conventional direct radiating speakers are

used in a home environment, their broad directional

characteristics result in a relatively high proportion

of reflected sound. Modern movie theatres,

however, are designed to offer a highly absorptive

acoustic environment in which

soundtrack recordings with five or

more channels can be used to

Microscopic View of

Polymer-Injected Mica.

achieve a rich sense of spatial

expression. To achieve a similar

level of spatial expression at

home, it is therefore necessary

to use speakers with a

direct/reflected sound ratio

that is quite different from

the speakers used for conventional music recordings.

All-Aluminium Dome Tweeters and Diffusers (HX

Series and 515 PMD Series)

Both the shape and material used for dome tweeter

diaphragms and diffusers were refined to improve

speed and response. 30µm pure aluminium film was

formed into a new dome shape and fitted with an

all-aluminium diffuser for wide-ranging 50kHz

sound reproduction capability.

3cm Aluminium-Magnesium Dome Tweeter with

DC-Diaphragm™ (225 PMD Series)

The high-performance tweeter features a dome

made of an aluminium–magnesium alloy, with a

DC-Diaphragm™ (integrated diaphragm and voice

coil). The tweeter is extremely light to minimise

decision is made. In the case of cabinets, for example,

we often build 50 to 60 cabinets and test each one. In

order to test many cabinets with many drivers in many

configurations, we begin with computer simulations, then

move to actual prototypes for measuring a myriad of

factors, such as the variations of standing waves inside the

cabinet. An anechoic chamber is used to obtain precise

acoustic data on pre-production models. Even speaker

finishes are rigorously tested for durability and how they

influence the sound. We have an environmental room

where speakers are tested for 500 hours in Amazon rain

forest conditions, and five different listening rooms,

Waveguide Horn (NS-8HX)

loss yet is highly durable. It is capable of

reproduction all the way up to 50kHz, which is rare

for a 3cm dome tweeter. Highs are crisp and clear

even at high power levels.

QD-Bass Technology

QD-Bass (Quatre Dispersion

Bass) technology uses

down-firing drivers with

square, pyramid-shaped

reflective plates to radiate

the sound efficiently in

four horizontal directions. The reflective plates

negate any effects caused by the floor surface and

reduce resonance between sound waves reflected

from the floor and the unit.

Advanced YST

Advanced Yamaha Active

Servo Technology (Advanced

YST) is a unique system in which the speaker and

amplifier work together to cancel out impedance so

the speaker unit has a perfectly linear motion.

Advanced YST helps to ensure the highest levels of

sound pressure and overall performance.

Advanced YST II

In Advanced YST II, an Advanced Negative

Impedance Converter enables the speaker cone to

be driven with even tighter control. The result is

more stable and accurate low range response, as

well as higher sound pressure levels, for more

natural and energetic bass reproduction.

where speakers are carefully evaluated reproducing a

variety of music and movie sources.

The Final Judgment

Throughout the design process and especially in the

final phase, our most important test equipments are the

ears of our speaker experts. Having hard data is helpful,

but deciding which cabinet sounds "better" and whether

the speaker meets Yamaha's high standards can only be

done by the "golden ears" of Yamaha speaker designers

who have dedicated their lives to the pursuit of beautiful,

natural sound.

1. Many cabinets are built and tested for each speaker series.

2. A testing room that simulates an actual listening room.

3. A wide range of parameters are tested.

4. Speakers undergo harsh environmental testing.