Specifications

FET input stage. This ensures balanced
output with no signal interference and
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
9
large aluminum-extruded 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:
䡲 Schottky Barrier diodes that allow fast
switching for high S/N ratio (RX-Z9).
䡲 High performance FE Mica capacitors
and Metric Mylar Film capacitors using
polypropylene material.
䡲 Thick PC board wiring with 5/8”φ
diameter copper jumper cables.
䡲 Two direct signal path speaker relays
with gold-plated crossover connections
and shielding.
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
DSP
Analog/DSP
High-sound quality, high
reliability gold-plated relays
Balanced signal transmission
for lower noise and distortion.
Multi-Channel In
Pure
Direct
(2ch)
YAC-520
Volume Control
Preout
Pure Direct
(2 Channels, L/R)
Pure Direct
(Multi-channel, L/R)
Analog
L/R
Input
Selector
-
+
In NFB
Bias Circuit
+B
- B
-
+
Speaker Out
Control Section
Power Amplifier
(Right) with Large,
Anti-Resonance,
Aluminum-
Extruded Heat
Sink (Right)
Providing Effective
Heat Dissipation
Gold-Plated
Extruded, Extra-
Large Speaker
Terminals
Two Direct Signal
Path Speaker
Relays with Gold-
Plated Crossover
Connection and
Shielding
Power Supply Chamber with Extra-Large Toroidal Transformer and Extra-Large
Custom-Made Block Electrolytic Capacitors (28,000µF)
Power Amplifier
(Left) with Large,
Anti-Resonance,
Aluminum-
Extruded Heat
Sink (Left)
Providing Effective
Heat Dissipation
(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)
1
2
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DIGITAL HOME THEATER TECHNOLOGIES
RX-Z9 Front Channel Signal Flow
Basic Circuit Diagram
DSP Chamber
Video Chamber
Preamp Chamber