Pure Direct

 

+

 

Preout

(2 Channels, L/R)

Pure

-

 

 

Direct

YAC-520

Pure Direct

(2ch)

Volume Control

Multi-Channel In

(Multi-channel, L/R)

 

 

Analog

 

Analog/DSP

 

 

High-sound quality, high

L/R

Input

 

 

Selector

DSP

reliability gold-plated relays

 

 

Balanced signal transmission

 

 

 

 

 

 

for lower noise and distortion.

RX-Z9 Front Channel Signal Flow

purest signal quality possible. Pure Direct provides the shortest possible signal path for two-channel or multichannel analogue inputs, with no signal processing and no display. Straight outputs the original analogue or digital signal without any post-processing. i.LINK provides a digital connection for DVD-Audio Linear PCM, Super Audio CD DSD (Direct Stream Digital) and other high quality audio sources. Direct provides a direct connection for analogue stereo/multichannel input and digital stereo/multichannel (via i.LINK) input, with a dimmed display.

Symmetrical Power Amplifier Circuitry (RX-Z9)

The High Current Amplification system uses a symmetrical, full push-pull circuit configuration with a complementary FET input stage. This ensures balanced output with no signal interference and

Basic Circuit Diagram

In

-

NFB

Circuit

Speaker Out

 

+

 

Bias

 

 

 

 

 

-B

highest slew rate (rate at which signal changes; affects high frequency response). Furthermore, the massive toroidal transformer and large capacity block electrolytic capacitors (28,000µF) ensure a consistently stable power supply.

Effective Linear Damping

Level variations due to high impedance tend to reduce an amplifier’s damping factor (ability to control unwanted speaker cone movement at low frequencies), and frequency variations cause it to fluctuate. Yamaha’s Linear Damping circuit cancels the effect of these variations, maintaining a high, stable damping factor for superior sound articulation and frequency response.

High Grade Construction with Independent

Chambers and Anti-Vibration Design (RX-Z9)

The RX-Z9 uses a heavy-duty, rigid chassis construction with separate individual chambers for left and right power amplifiers, power supply and control section to prevent any chance of interference. This thick chassis has electromagnetic shielding. The extremely large aluminium-extruded

Preamp Chamber

Video Chamber

DSP Chamber

Digital Home Theatre Technology

heat sinks have anti-resonance characteristics and ensure effective heat dissipation. Yamaha’s ToP-ART base and feet provide stability and further vibration-damping. The other receivers use many of these same design features.

Only the Finest Parts are Used

At this degree of extreme sound quality, each and every part in the receiver makes a difference. Yamaha technicians tested, selected and in many cases custom-designed all parts, and then tested them in groups to ensure that they sounded good together. Particularly noteworthy parts, in addition to the transformer and capacitors, include:

Schottky Barrier diodes that allow fast switching for high S/N ratio (RX-Z9/RX-V2500).

High performance FE Mica capacitors and Metric Mylar Film capacitors using polypropylene material.

Thick PC board wiring with 1.6mm φ diameter copper jumper cables.

Two direct signal path speaker relays with gold- plated crossover connections and shielding.

1

Gold-Plated

Extruded, Extra-

Large Speaker

Terminals

Power Amplifier (Left) with Large, Anti-Resonance, Aluminium-Extruded Heat Sink (Left) Providing Effective Heat Dissipation

Control Section

Two Direct Signal Path Speaker Relays with Gold-Plated Crossover Connection and Shielding

Power Amplifier (Right) with Large, Anti-Resonance, Aluminium-Extruded Heat Sink (Right) Providing Effective Heat Dissipation

2

34

56

(1)

Extra-Large Toroidal Transformer, (2) Extra-Large

Custom-Made Block Electrolytic Capacitors (28,000 µF),

(3)

Gold-Plated Extruded, Extra-Large Speaker Terminals,

(4)

Two Direct Signal Path Speaker Relays, (5) High Sound

Power Supply Chamber with Extra-Large Toroidal Transformer and Extra-Large Custom-Made Block Electrolytic Capacitors (28,000µF)

Quality Schottky Barrier Diode and (6) High Quality Selected

Parts (RX-Z9)

13

Page 13
Image 13
Yamaha manual Symmetrical Power Amplifier Circuitry RX-Z9, Effective Linear Damping, Only the Finest Parts are Used

RX-Z9 specifications

The Yamaha RX-Z9 is a flagship AV receiver that epitomizes high-end home theater experience, offering a comprehensive array of features and technologies that cater to audio enthusiasts and home cinema aficionados alike. Introduced in the mid-2000s, this receiver has established a legacy thanks to its powerful performance, versatility, and superior sound quality.

One of the most notable features of the RX-Z9 is its robust amplification system. With a power output of 140 watts per channel, the receiver can drive a wide range of speakers with ease. It supports 7.1-channel surround sound, delivering immersive soundscapes that make movies, music, and gaming come alive. The receiver employs YPAO (Yamaha Parametric room Acoustic Optimizer), an advanced auto-calibration system that analyzes the acoustics of the room and adjusts settings accordingly, ensuring optimal performance tailored to individual spaces.

The RX-Z9 is also equipped with a comprehensive suite of audio processing technologies, including Dolby Digital EX, DTS-ES, and Dolby Pro Logic II, providing users with an enveloping sound experience. The Digital Sound Field Processing feature allows users to customize their listening experience further, simulating beloved environments such as concert halls or stadiums.

Connectivity is paramount in the RX-Z9. The receiver features multiple HDMI inputs, allowing direct connection of high-definition sources like Blu-ray players and gaming consoles. Additionally, the inclusion of component, composite, and S-video inputs ensures compatibility with a multitude of legacy devices. For the audiophiles, the RX-Z9 supports various audio formats, including PCM, MP3, WMA, and FLAC, catering to digital music lovers.

Another standout characteristic of the RX-Z9 is its user interface. The on-screen display and intuitive remote control offer easy navigation through setup menus and functions. The receiver also features Zone 2 and Zone 3 output capabilities, allowing for multi-room audio distribution, which is an essential feature for those looking to create a whole-home audio experience.

Incorporating a build quality synonymous with Yamaha, the RX-Z9 boasts a solid design that emphasizes durability and performance. Its sophisticated aesthetic is complemented by an aluminum front panel, a hallmark of the premium product range.

In summary, the Yamaha RX-Z9 is a powerhouse of an AV receiver, packed with features and technologies that enhance the audio and visual experience. From its robust amplification to state-of-the-art audio processing, the RX-Z9 stands as a testament to Yamaha’s commitment to high-fidelity sound and cutting-edge technology, making it a coveted choice for anyone serious about home theater systems.