• Pure Class A operation delivers 100 watts of quality power into 8 ohms
• Two totally identical power amplifier units driven in parallel
• 20-parallel push-pull arrangement of MOS-FET devices in the output stage delivers linear high power progression to ultra-low 1-ohm impedance
• Input section configured as a dual instrumentation amplifier
• Double MCS+ circuit and current feedback topology in the amplification stage
• Support for bridged use of two A-250 units for even higher output power
• Strong power supply with a massive high-efficiency toroidal transformer and large filtering capacitors

The A-250 features fully discrete circuit components in a dual configuration employing the latest instrumentation amplifier topology, allowing all signal paths throughout the power amplifier to be fully balanced. This not only eliminates any possible internal sources of noise or distortion as demonstrated by the outstanding performance ratings, it also makes the amplifier highly impervious to changes in ambient conditions. Consequently, operation stability and reliability which are crucial for a power amplifier have been dramatically enhanced.

As shown in the circuit diagram of the amplifier section, the power amplification stage makes use of two completely identical power units, each with 10 N-channel and 10 P-channel power MOS-FETs connected in parallel. These units are arranged on the left and right sides of the chassis and driven in parallel, resulting in a 20-parallel configuration. This ensures a stable balance in terms of electrical operation, weight distribution, thermal dissipation, and other aspects. The parallel drive approach achieves a total allowable power dissipation value of 5.2 kW, which in turn reduces the power load on each MOS-FET, allowing each device to operate effectively in its range of optimum linearity