What is Nemesis
Introducing Nemesis, a cutting-edge Class AB audio power amplifier that combines precision, speed, and efficiency in an elegant, fully analog design. Engineered and crafted in Italy, Nemesis is the result of KRIEG Audio Department’s relentless pursuit of perfection—delivering exceptional audio performance with uncompromising quality, all in a compact form.
The heart of Nemesis is its flawlessly symmetrical design, featuring 34 transistors that work in harmony to provide:
- Exceptional Audio Precision: Ultra-low fundamental, intermodulation, and thermal (memory) distortion.
- High Frequency Accuracy: High slew rate and precision at high frequencies.
- Powerful Low-End Control: High damping factor for tight, accurate low frequencies.
- Low Noise, High SNR: Superior signal-to-noise ratio and very low noise for clean audio output.
- Total Stability: Invariable performance across different loads and capacitive conditions, with high thermal and frequency stability.
- High Efficiency: High open loop gain and power efficiency without the need for quiescent current (bias) regulation.
- Immunity to Variations: Resistance to thermal, voltage, and component variations, ensuring consistent performance.
Specs
| Parameter | Value | Unit |
|---|---|---|
| Amplifier class | AB | |
| Operation method | Single ended (the load is connected between the output and the ground) | |
| Supply voltage type | dual voltage | |
| Minimum supply voltage | +5, 0, -5 | Vdc |
| Recommended supply voltage | +30, 0, -30 | Vdc |
| Maximum supply voltage | +50, 0, -50 | Vdc |
| Program power (on all load impedances) | 100 | W |
| Maximum power (on all load impedances) | 200 | W |
| Standby power | 2 | W |
| Minimum raccomended supply current | 5 | A |
| Output gain | + 27 | dB |
| Minumum efficiency | 50 | % |
| Maximum efficiency | 94 | % |
| Minimum load impedance | 0.5 | Ohm |
| Nominal output current (+10Vdc, -10Vdc supply) | 15 | A |
| Nominal output current (+30Vdc, -30Vdc supply) | 7 | A |
| Nominal output current (+50Vdc, -50Vdc supply) | 4 | A |
| THD+N @ 1kHz | 8 Ohm | 100W | 0.005 | % |
| IMD THD | 8 Ohm | 100W | 0.007 | % |
| Slew rate | 60 | V/us |
| Damping factor @ 60 Hz | 8 Ohm | 4000 | |
| Output impedance @ 60 Hz | 8 Ohm | 0.002 | Ohm |
| Input impedance | 10 | kOhm |
| Bandwidth (-3dB) | DC - 1 | MHz |
| Audio bandwidth linearity | +- 0.01 | dB |
| SNR (non A-weight) @ 1kHz - 100W | 98 | dB |
| SNR (A-weight) @ 1kHz - 100W | 108 | dB |
| CMRR @ 1kHz | 116 | dB |
| PSRR @ 1kHz | 115 | dB |
| Open loop gain | 95 | dB |
| Board dimensions | 84 (H) x 90 (W) | mm |
Board dimensions
