Whether tube or solid-state, power amplifier designs from Audio Research have always emphasized the key criteria of musicality, lifelike dynamics, and realistic soundstaging. With the new Hybrid Drive HD220 stereo power amplifier, Audio Research brings the best of both worlds by combining the strengths of tube and solid-state technologies, resulting in a power amplifier that delivers unmatched sonic performance. The HD220 offers superbly musical performance, with a nuanced, lifelike character that promises to elevate your listening experience.

Please note : This is an open unit. Box packaging not available

Key Features

• Hybrid Drive Technology: Combines JFET input, 6922 dual triode gain stage, and 6H30 dual triode cathode follower to produce incredibly musical performance.
• 220W per Channel into 8 ohms: Delivers powerful output, with nearly 400W per channel into 4 ohms for impressive dynamics and bass control.
• Thermal Trak® Output Devices: Automatically adjust their internal bias in response to temperature changes for consistent performance under high-demand conditions.
• 200,000 µF Power Supply Energy Storage: Provides explosive dynamics and rock-solid bass impact and control.
• No Output Tubes to Replace: Enjoy consistent performance without the hassle of replacing output tubes.
• Low-Noise Fan Cooling: Keeps the output devices within their operating range for optimal performance.
• Tube Hours Meter: Monitor tube usage easily to ensure long-lasting performance.
• Exceptional Musicality: Low distortion, transparency, and purity create a listening experience that feels eerily lifelike.

Technical Specifications