Accuphase A-300 Class-A Monophonic Power Amplifier

Product Description

The Accuphase A-300 Monoblock Power Amplifier, launched to mark Accuphase’s 50th anniversary, sets a new standard for Class A amplification. Each monoblock delivers 125W into 8 ohms, 250W into 4 ohms, 500W into 2 ohms, and 1,000W into 1 ohm, with a damping factor of 1,000 (measured over 2,000) for unparalleled speaker control. Featuring a 20-parallel push-pull power MOS-FET output stage, MCS+ circuitry, and a fully discrete balanced input amplifier, the A-300 produces a noise-free, vibrant soundstage with exquisite detail and dynamics. Its champagne gold panel, LED bargraph, digital power meter, and meticulous Japanese craftsmanship make it an elegant centerpiece for audiophiles seeking reference-grade performance in high-end hi-fi systems.  

Key Features  

• Class A Power Output: Delivers 125W into 8 ohms, 250W into 4 ohms, 500W into 2 ohms, and 1,000W into 1 ohm per monoblock, ensuring linear, distortion-free sound for the most demanding loads.  
• 20-Parallel Push-Pull Output: Twenty parallel push-pull power MOS-FETs per channel, mounted on large heatsinks, provide high-current amplification for dynamic, effortless performance.  
• MCS+ Circuitry: Multiple Circuit Summation enhances signal purity, minimizing noise for a transparent, detailed soundstage.  
• Ultra-High Damping Factor (1,000): Optimized MOS-FET switches and refined signal paths deliver precise control, ensuring tight, articulate bass across frequencies.  
• Robust Power Supply: High-efficiency toroidal transformer and two custom-made 100,000μF filtering capacitors provide stable, clean power for high-current demands.  
• Fully Balanced Input Stage: Discrete balanced amplifier with current feedback eliminates interference, ensuring pristine audio with superior phase accuracy.  
• Versatile Connectivity: Includes 1 RCA unbalanced and 1 XLR balanced input per monoblock, with robust speaker terminals for secure connections.  
• Advanced Protection: Safeguards against over-current, overheating, and short circuits, ensuring reliability and longevity.  
• Customizable Gain: Four gain settings (MAX, -3 dB, -6 dB, -12 dB) allow fine-tuning to match system noise levels.  
• Elegant Design: Champagne gold panel, LED bargraph, digital power meter, and hidden control panel create a sophisticated, user-friendly aesthetic.

Why Choose the Accuphase A-300?

The A-300 represents the culmination of Accuphase’s Class A expertise, delivering a warm, midrange-rich sound with a captivating tonal glow, as lauded in Stereophile reviews. Its 20-parallel MOS-FET stage and custom capacitors, tuned for sonic excellence, excel with complex recordings like Mahler’s Symphony No.5, offering dynamic, expressive performance. Users praise its musical truth and ability to drive low-impedance loads down to 1 ohm, though some note a warmer midrange compared to neutral competitors like D’Agostino, suggesting careful system matching. With a damping factor exceeding 2,000, robust protection circuits, and handcrafted Japanese build quality, the A-300 is a future-proof investment for high-end stereo systems, inspiring extended listening with its immersive sound.  

Product Specifications  

• Power Output (Per Monoblock): 125W (8 ohms), 250W (4 ohms), 500W (2 ohms), 1,000W (1 ohm)  
• Amplifier Type: Pure Class A, 20-parallel push-pull power MOS-FETs  
• Damping Factor: 1,000 (measured >2,000)  
• 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: 126 dB (max gain)  
• Input Sensitivity: 1.13V (8 ohms, rated output)  
• Inputs: 1 RCA unbalanced, 1 XLR balanced per monoblock  
• Outputs: Speaker terminals (single pair per monoblock)  
• Power Supply: Toroidal transformer, dual 100,000μF capacitors  
• Controls: Gain switch (MAX, -3 dB, -6 dB, -12 dB), meter operation switch  
• Dimensions: 18.3" W x 8.8" H x 19.3" D (465 x 223 x 491 mm) per monoblock  
• Weight: 101.4 lbs (46 kg) per monoblock  
• Warranty: Contact authorized dealer for details

What’s Included  

• Accuphase A-300 Monoblock Power Amplifier 
• Power cord
• User manual

Perfect For  

• Audiophiles seeking pure Class A amplification for reference-grade stereo systems 
• High-end setups driving low-impedance or complex speaker loads down to 1 ohm  
• Hi-fi enthusiasts desiring a luxurious, high-performance amplifier with timeless aesthetics