RT Audio Design Orpheus single-ended class A Power amplifier

Pure A class from Bulgaria

Tsencov from RT Audio Design is preparing the review samples for review at Mono and Stereo. Here are few initial infos:
"This amplifier is designed with zero negative feedback (ZeroNFB), pure Class-A and definitely single-ended. The amplifier is built around the BUZ-900 N-Channel MOSFET

We use Mundorf Mcap SUPREME SILVER / GOLD or AMPOHM WOUND PRODUCTS – FP-CA-10-AU capacitors for the input coupling and a large electrolytic on the output with a 10 µF polyester bypass capacitor. The four 20 watt Mundorf`s amazing M-Resist™ SUPREME or Vishay 30W 1% non-inductive wire-wound resistors act as the load."

Power supply unit

This amplifier is powered with stabilized separate power supply, consisting of 300W transformer, 4 ultra fast shottky diodes MBR4060, low drop voltage regulator LM7824 and high quality electrolytic capacitors (Nichicon). The power is filtered using 40000µF capacitors model NICHICON – LLS1H103MELC

Technical data

Frequency response: 10 Hz – 100 kHz
Input put impedance: 10 kOhm
Output power: 7W continuous avg. output power into 8 Ohm at VCC +27V ( With sensitive speakers > 92 dB )


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