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Accuphase P-4500 STEREO POWER AMPLIFIER
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.
Features & Specifications
- 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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