The quest for the optimal power amplifier
has just taken another giant leap forward. The P-4500 features an
instrumentation amplifier configuration realized with discrete
semiconductors in the signal path, triple Darlington 4-parallel
complementary push-pull architecture and many other technology
advantages. The result is an impressive S/N ratio of 121 dB, rated
output of 500 watts into 1 ohm (music signals), and a damping factor of
700. A newly developed output protection circuit can also detect any
short-circuiting of the speaker terminals, for complete peace of mind.
This power amplifier is the ultimate tool for immersive music enjoyment
on the highest level.
Since
Accuphase started with the P-300 in 1973, the 50 year history of
Accuphase Power Amplifiers has continued to evolve, with a wide range of
variations such as Monophonic, Class-A and Class-AB. The Accuphase
P-4500 is the successor to the P-4200 launched in 2013. This new model
is a direct descendant of the first P-300. The P-4500 is a mighty entry
level power amplifier that also gets very close to the audio performance
of our flagship A-250.
P-4500
features best in class low noise and high damping factor performance.
With the enhanced power output stage, the amplifier is able to perfectly
drive modern high-end low impedance loud speakers. Thanks to the
massive power supply with built in headroom, new P4500 clearly expresses
the dynamics and excitements of music sources, and it also offers the
excellent performance in all kinds of environments.
Features
- 4-parallel complementary push-pull configuration using bipolar power transistors
- Linear output characteristics (90 W/8Ω, 180 W/4Ω, 360 W/2 Ω)
- 500 W output into ultra-low impedance load of 1Ω (music signals)
- Strong power supply with massive toroidal transformer and large 50,000 μF filtering capacitors
- Instrumentation amplifier principle
- High-gain signal input section for outstanding S/N ratio
- Dedicated power supply for signal input section ensures stable operation
- Line and balanced input connectors
- Polarity switching for balanced input connectors
- MCS+ circuit topology further reduces noise
- Current feedback principle in amplification circuitry
- Protection circuitry using MOS-FET switches
- High damping factor of 700
- Balanced Remote Sensing
- Speaker output protection with over-current detection
- Highly responsive large peak power meters
- Two sets of large speaker terminals
- 4-step gain control
- Support for bi-amping and bridged mode
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