SOULUTION 325

Pre owned. In excellent condition. Free from visible signs of wear. Supplied with remote control, original packaging, and manual. Phono and DAC modules not included.

The Soulution 325 preamplifier embodies the essence of sonic purity: dynamics, resolution, control, and musicality blend into an almost perfect balance, delivering a faithful and uncompromising listening experience. Its design philosophy is simple yet absolute — a preamplifier should only amplify or attenuate the music signal without altering it in any way. The goal is to eliminate distortion, hum, and noise while ensuring perfect channel separation and an exceptionally wide bandwidth. The Soulution 325 meets these standards with elegance and precision, offering a sound that is neutral, transparent, and natural.

Internally, the design favors simplicity and linearity. The signal path is kept as short as possible through an unbalanced layout, while the physical separation of the left and right channels guarantees excellent independence and virtually zero crosstalk. High-quality relays manage input selection, and an audio-grade coupling capacitor protects the preamplifier, power amplifiers, and loudspeakers from any DC components that may come from connected sources.

The Soulution 325’s volume control is among its most refined features. It uses ultra-precise, low-noise metal film resistors to regulate both volume and balance, ensuring the highest possible signal fidelity. During level adjustments, a secondary circuit based on a PGA (Programmable Gain Amplifier) activates to prevent switching transients that could harm the power amplifier. This system operates only during adjustment, allowing smooth, click-free transitions; once the desired level is set, control returns to the precision resistor network.

Power is supplied through a high-grade switching supply with audiophile-level DC-DC converters and linear regulators, delivering exceptionally clean and stable voltages. Physical isolation from the analog audio boards and effective shielding prevent noise induction. Compared to traditional power supply designs, Soulution’s approach ensures superior stability and lower noise, contributing to a quieter, more transparent sonic presentation.

Thanks to its Theater Mode, the Soulution 325 integrates seamlessly into audio/video systems. A dedicated input can be configured as a surround channel, automatically bypassing the preamplifier’s volume and balance controls for perfect compatibility with home theater setups.

Every aspect of the Soulution 325 is crafted to serve a single purpose: to reproduce music in its purest and most authentic form, preserving every nuance of the original signal with naturalness and precision that place it among the finest achievements in modern audio engineering.

Technical specifications:

• Analog inputs: 2 × balanced (XLR); 2 × unbalanced (RCA)
• Input impedance: 3 kΩ balanced (XLR); 3 kΩ unbalanced (RCA)
• Gain: –79 to +10 dB
• Frequency response (–3 dB): 0 – 800 kHz
• THD + N: <0.0001%
• Signal-to-noise ratio: >120 dB
• Output current (peak): >0.2 A
• Channel separation: >120 dB
• Output impedance: 10 Ω balanced (XLR); 10 Ω unbalanced (RCA)
• LINK (remote turn-on): 2 × 3.5 mm jacks
• Dimensions (W × D × H): 430 × 350 × 142 mm
• Weight: ~15 kg