The Orpheus Lab A Three S200 is a high-performance stereo power amplifier designed and manufactured in Switzerland. Drawing upon amplification technology developed for the company’s Heritage Opus II range, it incorporates a genuine dual-mono architecture and a sophisticated Class AB output stage delivering 200 watts per channel into 8 ohms. Each channel employs six individually hand-matched high-power MOSFETs, governed by bipolar transistor control circuitry and a proprietary multi-point feedback topology. This carefully engineered arrangement provides precise control of the output stage, with instantaneous current delivery reaching 15 amperes and a damping factor exceeding 3,000, making the A Three S200 particularly well suited to driving demanding loudspeaker loads.
Power delivery is supported by two independent 880VA toroidal transformers, each accompanied by 48,000µF of dedicated reservoir capacitance. A proprietary bias regulation circuit maintains consistent operating conditions across changes in temperature and load, while a carefully calibrated 125mA bias current establishes the amplifier’s Class AB operating point. Balanced XLR and unbalanced RCA inputs provide flexibility when partnering the amplifier with different preamplifiers, while comprehensive protection circuitry safeguards against excessive current, DC at the loudspeaker outputs and mains interruptions. Combining substantial current capability, wide bandwidth and carefully controlled output-stage operation, the A Three S200 provides a technically accomplished foundation for a high-performance separates system.
Key Features
High-performance Class AB stereo power amplifier
Designed and manufactured in Switzerland
Part of the Orpheus Lab Absolute Series
Incorporates technology developed for the Heritage Opus II range
Rated output power: 200 watts per channel into 8 ohms
Genuine dual-mono amplifier architecture
Six individually hand-matched high-power MOSFETs per channel
Twelve high-power MOSFET output devices in total
Bipolar transistor control circuitry for each MOSFET
Proprietary multi-point feedback topology
High-current output stage capable of 15A instantaneous current peaks
Instantaneous peak power: 850W for durations below 200ms
Class AB output-stage operation
Proprietary bias regulation circuitry
125mA calibrated bias current
15W thermal idle dissipation per channel
Low-impedance bipolar transistor bias regulation
Bias regulation designed to maintain stable operating conditions across changes in temperature and load
Two independent 880VA toroidal power transformers
Dedicated transformer for each audio channel
48,000µF reservoir capacitance per channel
Total reservoir capacitance: 96,000µF
Balanced XLR analogue input
Unbalanced RCA analogue input
Selectable signal grounding for the unbalanced input
Grounded and lifted signal-ground configurations
High damping factor exceeding 3,000
Wide-bandwidth amplifier design
Frequency response extending to 85kHz at -3dB
THD+N of 0.004% at rated output power
Balanced-input dynamic range exceeding 114dB
Protection against excessive output current
Protection against DC components at the loudspeaker outputs
Automatic muting during mains voltage interruption
Substantial 30kg chassis construction
The Orpheus Lab A Three S200 is a high-performance stereo power amplifier designed and manufactured in Switzerland. Drawing upon amplification technology developed for the company’s Heritage Opus II range, it incorporates a genuine dual-mono architecture and a sophisticated Class AB output stage delivering 200 watts per channel into 8 ohms. Each channel employs six individually hand-matched high-power MOSFETs, governed by bipolar transistor control circuitry and a proprietary multi-point feedback topology. This carefully engineered arrangement provides precise control of the output stage, with instantaneous current delivery reaching 15 amperes and a damping factor exceeding 3,000, making the A Three S200 particularly well suited to driving demanding loudspeaker loads.
Power delivery is supported by two independent 880VA toroidal transformers, each accompanied by 48,000µF of dedicated reservoir capacitance. A proprietary bias regulation circuit maintains consistent operating conditions across changes in temperature and load, while a carefully calibrated 125mA bias current establishes the amplifier’s Class AB operating point. Balanced XLR and unbalanced RCA inputs provide flexibility when partnering the amplifier with different preamplifiers, while comprehensive protection circuitry safeguards against excessive current, DC at the loudspeaker outputs and mains interruptions. Combining substantial current capability, wide bandwidth and carefully controlled output-stage operation, the A Three S200 provides a technically accomplished foundation for a high-performance separates system.
Key Features
High-performance Class AB stereo power amplifier
Designed and manufactured in Switzerland
Part of the Orpheus Lab Absolute Series
Incorporates technology developed for the Heritage Opus II range
Rated output power: 200 watts per channel into 8 ohms
Genuine dual-mono amplifier architecture
Six individually hand-matched high-power MOSFETs per channel
Twelve high-power MOSFET output devices in total
Bipolar transistor control circuitry for each MOSFET
Proprietary multi-point feedback topology
High-current output stage capable of 15A instantaneous current peaks
Instantaneous peak power: 850W for durations below 200ms
Class AB output-stage operation
Proprietary bias regulation circuitry
125mA calibrated bias current
15W thermal idle dissipation per channel
Low-impedance bipolar transistor bias regulation
Bias regulation designed to maintain stable operating conditions across changes in temperature and load
Two independent 880VA toroidal power transformers
Dedicated transformer for each audio channel
48,000µF reservoir capacitance per channel
Total reservoir capacitance: 96,000µF
Balanced XLR analogue input
Unbalanced RCA analogue input
Selectable signal grounding for the unbalanced input
Grounded and lifted signal-ground configurations
High damping factor exceeding 3,000
Wide-bandwidth amplifier design
Frequency response extending to 85kHz at -3dB
THD+N of 0.004% at rated output power
Balanced-input dynamic range exceeding 114dB
Protection against excessive output current
Protection against DC components at the loudspeaker outputs
Automatic muting during mains voltage interruption
Substantial 30kg chassis construction
