Yamaha PC4801N: Power Amplifier
Maximum sound quality with
minimum distortion for a new dimension in powerful, clear sound: From
the start, the new Yamaha PC4801N had a lot to live up to. As the next
generation in Yamaha’s flagship PC lineup, it had to deliver the
same exceptional standards of clear separation and rapid response while
taking sound quality to the next level. Yamaha audio engineers went
to work examining every detail of sound quality. Which led to breakthrough-level
innovations in circuitry and internal wiring. Meticulous part selection
— including environmentally friendly leadfree parts — and
innovative combinations. And new circuit board mounting methods to absorb
unnecessary vibrations. They also analyzed feedback from public address
professionals on-site and tested prototypes with commitment bordering
on obsession. The results were worth it. Results like the highest level
of sound quality with the lowest level of distortion available. Clear
and transparent, yet powerful and robust. A responsive, dynamically
energetic low range, rich, mellow mid range and high-resolution high
range. The bottom line? The Yamaha PC4801N features dynamic, deep, detailed
sound with exceptional balance — the kind of performance that
"runs in the family".
Yamaha P4801N FEATURES
- 550W/Ch & 8 Ohm Stereo
[Power Rating &
1kHz THD+N = 1%]
- In-depth analysis and circuit innovation, meticulous
part selection, and advanced circuit mounting methods deliver outstanding
sound quality with the lowest possible distortion.
- Advanced EEEngine technology achieves high-quality
sound and exceptional power output with dramatically reduced power consumption.
- Selectable stereo, dual mono and bridged mono
modes for maximum versatility.
- A comprehensive selection of rear-panel terminals
and connectors for versatile connectivity.
- An impressive array of protection circuitry
and indicators ensure stable operation and accurate monitoring.
- Built-in high-pass (subsonic) filter cuts frequencies
below 20 Hz.
- Can be connected to a Yamaha ACU16-C Amplifier
Control Unit (optional) and computer to allow monitoring and control
of amplifiers and speakers.
- Monitor and control multiple amplifiers on a
CobraNet™ network via the Yamaha NHB32-C Network Hub/Bridge.
- The PC3301N has been specially designed for
use as a distribution amplifier in installations, and is capable of
driving high-impedance loads with multiple parallel-connected 100-volt
- Ideal matches for the DME64N/24N Digital Mixing
Engines and Installation Series speakers.
New advanced switching regulator
and high-efficiency EEEngine technology: Thanks to Yamaha’s
advanced new switching regulator and high-efficiency EEEngine technology,
the Yamaha PC4801N features high-quality sound and exceptional power
with slashed power consumption and new compact size. The switching regulator
stabilizes output voltage and current — even when line voltage
varies — for maximum efficiency drive. Which means that, unlike
conventional linear power supplies that use a transformer, the switching
regulator guarantees balanced sound with no instability even at high
output levels. What’s more, the improved amp drive efficiency
as a result of the switching regulator is the key behind other important
Yamaha PC4801N features like reduced heat loss, longer part life, lighter
weight, more compact size and lower power consumption. And thanks to
the advanced switching regulator and other refinements, the Yamaha PC4801N’s
switching regulator features the highest performance ever — clear,
stable, high-quality sound in installed sound systems with long power
cables and outdoor, large-scale public address applications with unstable
primary power sources. Next, EEEngine technology is the key to slashing
power consumption without sacrificing sound quality. The independent
auxiliary power line and highspeed voltage buffer feature split-second
response capabilities to fast attack sound. What’s more, new MOSFET
(Metal Oxide Semiconductor Field Effect Transistor) circuitry in the
high-efficiency current buffer is why the Yamaha PC4801N boosts efficiency
to a phenomenal 200% — 50% lower power consumption — over
conventional Class-AB amplifiers.
Easy-to-read indicators and
comprehensive protection circuitry: The Yamaha PC4801N
features an impressive array of protection circuitry and indicators
to ensure stable operation and accurate monitoring. The front panel’s
10- segment LED level meters guarantee accurate level monitoring —
even under poor lighting conditions. If output signal distortion exceeds
1%, the red "CLIP" indicator lights and the PC limiter activates
automatically. In terms of DC voltage protection, surges of excess current
activate the speaker protection circuitry and cause the "PROTECTION"
indicator to light. What’s more, the high-efficiency EEEngine
prevents against overheating under almost any circumstances. However,
the "TEMP" lamp illuminates if heat sink temperature rises
above 85. And at temperatures over 90, the thermal protection circuit
automatically shuts down the system — for a fail-safe protection
There’s more. The 31-step-detented level controls
for channels A and B come with a security cover to prevent control settings
from being changed accidentally. The "POWER/STAND-BY" indicator
does double duty; green means the power is on, while orange notifies
users of a "stand-by" command from the connected external
control unit. And the "REMOTE" on the rear panel illuminates
when control signals are received from an external device connected
to the DATA port.
Three drive modes guarantee
maximum application flexibility: All PC-1N models feature
stereo, dual mono and bridged mono modes for the ultimate in versatility.
In the Stereo mode, the two channels are independent. The Parallel (dual
mono) mode allows a single, mono input signal to drive two independent
speaker systems. And in the Bridge mode, the two channels work together
as one, pumping out maximum power. What’s more, the rear panel
MODE switch lets you change modes quickly and easily for top versatility
any time, anywhere. In terms of individual model capabilities, the Yamaha
PC3301N was specially designed for use as a distribution amplifier
to drive multiple speakers in installed sound systems based on its ability
to drive highimpedance loads using multiple 100-volt line output speakers
Multiple I/O connections
plus subsonic filter cut unwanted low frequencies: The
comprehensive array of rear panel terminals and connectors let you use
the Yamaha PC4801N with the widest possible range of systems and equipment.
Balanced XLR (XLR3-32) and Euro-block terminals are featured as inputs
for quick, easy connection. All Yamaha PC-1N models also come with a
built-in high pass (subsonic) filter that eliminates frequencies below
20Hz. On the output side, 5-way heavy-duty binding-post terminals and
Speakon™ connectors ensure solid, reliable speaker connections.
Finally, all models are equipped with a lockable/detachable power supply
Remote amplifier monitoring/control
with cutting-edge CobraNet™
audio networking interface: Each Yamaha PC-1N model
can be connected to a Yamaha ACU16-C amplifier control unit (optional)
and Windows PC through its rear-mounted RJ-45 connector — to let
you monitor/control the amplifiers and speakers connected to it. You
can control AMP ID settings with the unit’s 5-bit DIP switch and
up to 32 PC-1N serial interface connections with one Yamaha ACU16-C.
If a protection system is activated in any of the amplifiers, the PC’s
NetworkAmp Manager software automatically displays a pop-up warning
window and logs current parameters for quick, easy trouble shooting
— even in complex amp systems. What’s more, the NHB32-C
Network Hub/Bridge (optional) lets you monitor/control the entire system
via CobraNet™ — as well as using the ACU16-C as a high-quality
24-bit DA converter.