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The Yamamoto Sound Craft A-011 is a pure Class-A single-ended stereo power amplifier using 2A3 output tubes. It features a minimalist circuit with one vacuum tube per channel for both driver and output stages, enabling direct connection from a CD player for optimal sound quality through just two tubes per channel. It includes series input volumes and supports connection to preamplifiers, analog equalizers, or other sources. The amplifier uses 717A driver tubes and an '80' rectifier tube, with DC ignition for the heaters using double-wave rectification and low-loss Schottky diodes to minimize noise. High-quality components include a toroidal power transformer, high-beam cut-core output transformer, selected film capacitors, and premium resistors like DALE wirewound types. It delivers an energetic, powerful sound with low impedance drive capability. Introduced in 2009, it remains listed for sale but newer models like A-011SS exist.
Amplification power output and characteristics
Analog signal output specifications
Input and output connections
Size, weight, and appearance
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions
The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The Silver Night MkII 300B's power @ 8ω is 7W against the Yamamoto Soundcraft A-011's 4W and its high-frequency extension 24 kHz against 30 kHz. Both share low-frequency extension (20 Hz) and class (A).
The Transcendence 2A3's power @ 8ω is 2.7W against the Yamamoto Soundcraft A-011's 4W and its high-frequency extension 25 kHz against 30 kHz. Both share low-frequency extension (20 Hz) and class (A).
The Yamamoto Soundcraft A-08S 45 SET's power @ 8ω is 2W against the Yamamoto Soundcraft A-011's 4W, its output voltage 0.7V RMS against 4.0V RMS, and its input impedance 200Ω against 100Ω. Both share class (A).
The ECI 2's power @ 8ω is 50W against the Yamamoto Soundcraft A-011's 4W, its high-frequency extension 20 kHz against 30 kHz, and its input sensitivity 0.3V RMS against 0.4V RMS. Both share low-frequency extension (20 Hz).
2A3 Single A-011SS
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