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General| Number of Channels | 2 |
|---|---|
| THD+N | < 0.1% |
| Total Harmonic Distortion | < 0.1% |
| S/N Ratio | > 100 dB |
| Signal-to-Noise Ratio | > 100 dB |
| Damping Factor | > 200 |
| Frequency Response | 20 Hz - 20 kHz |
| Input Impedance | 20 kΩ Balanced, 10 kΩ Unbalanced |
| Protection | Short circuit, thermal, overload |
Details the A-B class amplifier structure and the NE5534 OpAmp as the controlling core.
Explains transistor biasing, current adjustment, and temperature-dependent bias stability.
Covers the Zobel network for impedance constancy and DIAC-triac for DC offset removal.
Details MOSFET drain current and drain-source voltage monitoring for protection.
Explains the ANTICLIP system that reduces input signal level at clipping.
Describes dual-function thermal control for fan speed/shutdown and the stand-by circuit.
Illustrates component placement for EP03-99C&D, focusing on potentiometers and LEDs.
Steps to perform before activating the unit, including switch settings and connections.
Verifying power-on, bias current, stand-by time, attenuation, and output power.
Checking frequency response, mono mode, clipping, and subsonic filter effects.
Verifying thermal protection by shorting thermal probes and observing relay/LED actions.
Checking output voltage limits for different stages under protection testing.
Visual inspection of mechanical parts and general presentation of the unit.
Performing a 24-hour burn-in test at 3dB below maximum output power.
Assessing sound quality, potentiometer sweep, and output short-circuit robustness.
