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 multi-channel analog inputs, with no signal processing and no display. Straight outputs the original analog 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 analog stereo/multi-channel input and digital stereo/multi-channel (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 IndependentChambers 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 aluminum-extruded

Preamp Chamber

Video Chamber

DSP Chamber

Digital Home Theater 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 5/8”φ diameter copper jumper cables.

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

1

Gold-Plated

 

 

 

 

 

Two Direct Signal

 

 

 

 

Extruded, Extra-

 

 

 

 

Path Speaker Relays

Large Speaker

 

 

 

 

with Gold-Plated

Terminals

 

 

 

 

Crossover

 

 

 

 

 

 

 

 

 

 

Connection and

 

 

 

 

 

 

Shielding

Power Amplifier

 

 

 

 

Power Amplifier

(Left) with Large,

 

 

 

 

(Right) with Large,

Anti-Resonance,

 

 

 

 

Anti-Resonance,

Aluminum-Extruded

 

 

 

 

Aluminum-Extruded

Heat Sink (Left)

 

 

 

 

 

Heat Sink (Right)

 

 

 

 

 

Providing Effective

 

 

 

 

Providing Effective

Heat Dissipation

 

 

 

 

Heat Dissipation

 

 

 

 

 

 

 

Control Section

Power Supply Chamber with Extra-Large Toroidal Transformer and Extra-Large Custom-Made

Block Electrolytic Capacitors (28,000µF)

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 Quality Schottky Barrier Diode and (6) High Quality Selected Parts (RX-Z9)

15