Soulution 725 Preamplifier

The Soulution 725 Preamplifier represents a significant advancement in analog signal management, featuring a completely redesigned power supply that delivers superior precision and response compared to its predecessor. With over 500,000 µFarad of storage capacitance, it provides virtually unlimited impulse current to the audio circuits. The dual-mono architecture with discrete left and right channels minimizes crosstalk while maintaining exceptional channel separation and bandwidth extending to 1 MHz. High-precision metal foil resistors govern volume and balance control, while a secondary PGA circuit eliminates switching artifacts during adjustments. The multi-stage output amplification, derived from the acclaimed 711 power amplifier design, effortlessly drives extended interconnects with ultra-wideband performance reaching 2 MHz. An optional ultra-wideband phono MC stage delivers up to 80dB gain while maintaining strict RIAA-IEC compliance. Dual independent power supplies—one dedicated to audio circuits, one to digital control—ensure pristine voltage stability throughout the signal path. Intuitive front-panel operation via three buttons and rotary control provides complete system optimization.

Specifications