Ref Silicon Chip August 2008
This ultra low distortion amplifier module uses the new ThermalTrak power transistors and is largely based on the high-performance Class-A amplifier, which was featured in Silicon Chip during 2007. The ThermalTrak transistors are a new version of the premium MJL3281A & MJL1302A and have an integral diode for bias compensation. As a result, the circuit has no need for a quiescent current adjustment or a Vbe multiplier transistor and has an exceptionally low distortion figure. Kit supplied with PCB and all electronic components. Heat sink and power supply not included.
Output power: 135WRMS into 8 ohms and 200WRMS into 4 ohms
Frequency response at 1W: 4Hz to 50kHz
Input sensitivity: 1.26V RMS
Input impedance: ~12k ohms
Harmonic distortion: Signal-to-noise ratio: 122dB unweighted (22Hz to 22kHz)
Damping factor: Stability: Unconditional
PCB: 135 x 115mm
