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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
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:
Ⅲ Schottky Barrier diodes that allow fast switching
for high S/N ratio (RX-Z9/RX-V2500).
Ⅲ High performance FE Mica capacitors and Metric
Mylar Film capacitors using polypropylene
material.
Ⅲ Thick PC board wiring with 1.6mm φ diameter
copper jumper cables.
Ⅲ Two direct signal path speaker relays with gold-
plated crossover connections and shielding.
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
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,
Aluminium-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,
Aluminium-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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RX-Z9 Front Channel Signal Flow
Basic Circuit Diagram
DSP Chamber
Video Chamber
Preamp Chamber
Digital Home Theatre Technology
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