Accuphase P-4600 Stereo Power Amplifier

Product Description

The Accuphase P-4600 Stereo Power Amplifier is a high-performance Class AB amplifier, delivering 150W per channel into 8 ohms, 300W into 4 ohms, 450W into 2 ohms, and 600W into 1 ohm, with a damping factor of 800 for exceptional speaker control. Succeeding the P-4500, it features a four-parallel push-pull power MOS-FET output stage, MCS+ circuitry, and a balanced instrumentation amplifier, ensuring a vibrant, noise-free soundstage with remarkable dynamics and clarity. Its champagne gold panel, large VU meters, and meticulous Japanese craftsmanship make the P-4600 a stunning choice for audiophiles seeking powerful, refined amplification for high-end hi-fi and home theater systems.  

Key Features  

• Class AB Power Output: Delivers 150W per channel into 8 ohms, 300W into 4 ohms, 450W into 2 ohms, and 600W into 1 ohm, providing robust power for demanding speaker loads.  
• Four-Parallel Push-Pull Output: Four parallel push-pull power MOS-FETs per channel, mounted on large heatsinks, ensure high-current amplification for dynamic, distortion-free sound.  
• MCS+ Circuitry: Multiple Circuit Summation enhances signal purity, reducing noise for a transparent, detailed soundstage.  
• High Damping Factor (800): Optimized MOS-FET switches with low on-resistance and refined signal paths deliver precise speaker control and tight, articulate bass.  
• Robust Power Supply: Massive toroidal transformer and four 47,000μF filtering capacitors (188,000μF total) provide stable, clean power for high-current demands.  
• Balanced Input Stage: Instrumentation amplifier with current feedback minimizes interference, ensuring pristine audio with excellent phase accuracy.  
• Versatile Connectivity: Includes 1 RCA unbalanced and 1 XLR balanced input per channel, with speaker terminals supporting A/B configurations and bi-wiring.  
• Advanced Protection: MOS-FET-based circuitry protects against short-circuiting, DC voltage, and overheating, ensuring reliability without relay contact resistance.  
• Bridged Mono Operation: Configurable as a monoblock, delivering 600W into 8 ohms, 1,200W into 4 ohms, and 1,800W into 2 ohms for high-power setups (1 ohm not guaranteed in bridged mode).  
• Elegant Design: Champagne gold panel, backlit VU meters with adjustable brightness, and a robust chassis reflect Accuphase’s premium craftsmanship.

Why Choose the Accuphase P-4600?

The P-4600 combines Accuphase’s advanced technologies with robust Class AB power, offering a dynamic, transparent sound that excels with complex recordings and demanding speakers. Its four-parallel MOS-FET stage and MCS+ circuitry reduce noise and distortion, delivering a refined, open soundstage with precise imaging. Users praise its ability to drive low-impedance loads down to 1 ohm and its vibrant dynamics, though some note a slightly forward treble that benefits from careful preamplifier and speaker pairing. With a damping factor of 800, bridged mono capability, and handcrafted Japanese build quality, the P-4600 is a versatile, future-proof choice for high-end stereo and home theater systems, rivaling amplifiers at higher price points.  

Product Specifications  

• Power Output (Stereo): 150W/channel (8 ohms), 300W/channel (4 ohms), 450W/channel (2 ohms), 600W/channel (1 ohm)  
• Power Output (Bridged Mono): 600W (8 ohms), 1,200W (4 ohms), 1,800W (2 ohms)  
• Amplifier Type: Class AB, four-parallel push-pull power MOS-FETs  
• Damping Factor: 800  
• Frequency Response: 20 Hz–20 kHz (+0, -0.2 dB) at rated output; 0.5 Hz–160 kHz (+0, -3 dB) at 1W  
• Total Harmonic Distortion: 0.05% (2–16 ohms)  
• Signal-to-Noise Ratio: 124 dB (max gain)  
• Input Sensitivity: 1.38V (8 ohms, rated output)  
• Inputs: 1 RCA unbalanced, 1 XLR balanced per channel  
• Outputs: Speaker terminals (A/B, bi-wiring capable)  
• Power Supply: Toroidal transformer, four 47,000μF capacitors  
• Controls: Gain switch (MAX, -3 dB, -6 dB, -12 dB), meter operation switch  
• Dimensions: 18.3" W x 8.3" H x 18.7" D (465 x 211 x 475 mm)  
• Weight: 74.3 lbs (33.7 kg)  
• Warranty: Contact authorized dealer for details

What’s Included  

• Accuphase P-4600 Stereo Power Amplifier  
• Power cord  
• User manual

Perfect For 

• Audiophiles seeking powerful Class AB amplification for high-end stereo systems  
• High-power setups using bridged mono mode for demanding speakers  
• Hi-fi and home theater enthusiasts needing a robust, elegant amplifier with premium performance