Power Amplifier Module - 300W
PA3CC is a bipolar power amplifier of classical design working in class AB with moderate power consumption.
PA3CC consists of a differential cascode coupled input stage controlled by a current generator. The input stage
is totally discreet to optimize for linearity and bandwidth. The voltage gain stage is also cascode coupled,
which is differentially symmetric in class A, to achieve low distortion at high frequencies. The output stage
is of high current gain being an easy load to the voltage gain stage. The output stage consists of 6 pieces
totally complimentary high speed high power bipolar transistors.
PA3CC are decoupled at positive and negative supply with 2.2uF polypropylene capacitors.
PA3CC has short circuit protection, thermal protection and rail fuses to prevent output device break down.
PA3CC features sonic excellence, constant low output impedance, low noise, low distortion and high reliability.
The maximum power output depend on voltage supply, heat sink and load conditions. Recommendations: Voltage supply of
+ / - 65V, heat sink less than 0,6 K / W and minimum load of 2Ω.
Measurments preformed by the Danish Audio magazine High Fidelity
- Maximum power output: 200W (8 Ω), 400W (4 Ω)
- 6 high speed output power transistors
- Supply voltage +/- min. 35V - max. 95V
- Distortion : <0.08%
- Frequency response: 5-150kHz (-3dB)
- Slew rate : >40V/µs
- S/N: >110dB
- Gain: 22dB
- Input impedance : 4kΩ
- Output impedance : <0.1Ω
- Thermal protection above 80°Celcius
- Mute control
- Weight: app. 320g
- Overall dimensions: 180mm x 75mm x 32mm
The measurements were preformed with their Analog Precision measurement system.
PA3CC were powered with PSU12SA and TR600.
Power vs. THD+N (BW=20kHz): Blue 8Ω (175W), red 4Ω (320W) and green 2Ω (500W).
THD+N (BW=500kHz) vs. frequency at 100w in: 8Ω (blue), 4Ω (red) and 2Ω (green).
FFT. at 100W in 8Ω THD+N: 0,020% (BW20kHz).
Impuls current in 8Ω (blue), 4Ω (red), 2Ω (green) and 0,6Ω (yellow).