The amplification moduleAUDIOPHONICS APD87 is based on 3 high-performance circuitsLM3886developed by National SemiConductor.
Working in Class AB, and capable of 50W continuous power under a load of 8Ω, this trio of transistors can reach 400W peak, with a coherent harmonic distortion rate of only 0.1%.
With a thermal and electrical stability, the 4145 is equipped with a double protection system sophisticated surge protection (proprietary technology Spike™) and undervoltages, the latter occurring when the power supply drops below 12V.
The filtering of the transistors uses 2 electrolytic capacitors of 63V / 470μF. An MKP capacitor of 2,2uF / 400VDClocated at the input to suppress the DC component of the signal.
WARNING :This product requires the use of a passive radiator of appropriate size.
Some components may vary according to delivery.
- Continuous Power: 150W / 3Ω +/- 35V
- 200W / 4Ω +/- 28V
- Signal to Noise Ratio: ≥ 92dB
- Input Impedance: 47kohm
- Total Harmonic Distortion Rate: 0.1% (20Hz-> 20KHz)
- Supply Voltage Recommended: ± 28-35V ( Transformer between 20 & 25V AC )
- Total Dimensions: 135 x 62 x 42mm (L x W x H)
- Weight: 120g
Technical drawing (PDF)
1:Output HP +
5:Power supply + V
2:HP GND Output
3:Power supply -V
4:Power supply GND