AFM25 Gold
AFM25
Power Monophonic Amplifier, Class A
The AFM25 monophonic amplifier is a Class A hybrid monophonic power amplifier that incorporates all the core principles of Riviera amplifiers: Zero Overall Feedback, a Hybrid design (valves for voltage amplification, solid-state devices for power), and Pure Class A operation. The AFM25 delivers 25W into 8 ohms in Class A (50W into 4 ohms) and is capable of driving loudspeakers with exceptional naturalness.
Voltage amplification is provided by a pure triode operating in Class A.
The power section employs four devices, each capable of dissipating 150W continuously.
The power section’s power supply, which uses an oversized transformer, employs a refined pigreco filter and distributed capacitance; the total capacity amounts to over 65,000uF.
The amplifier is deliberately designed without current-limiting systems, making it suitable for the most complex loads.
The AFM25’s refinement and driving capabilities allow it to be used in both single-amplification and multi-amplification systems.
- Power 25W (into 8 ohms)
- Zero Feedback
- Pure Class A
- Hybrid circuitry
- 1 RCA line input
- 1 balanced input (transformer)
- Gain: 21.5dB
- Input Sensitivity: 240mVrms for 1W/8 ohm (2.83Vrms); 1.2Vrms for 25W/8 ohm (14.3Vrms)
- Input impedance: 47k
- Valve used: 1xECC82/12AU7
- Dimensions: 26×43.5×14.5(h) cm
- Weight: 14.4 kg
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