soulution 525 preamplifier
Best preamplifier for audiophiles seeking absolute signal purity and sonic transparency.
The soulution 525 preamplifier is meticulously engineered to bridge source components and power amplifiers with unparalleled signal accuracy. It aims to achieve the ideal preamplifier by preserving the integrity of the music, adding nothing and removing nothing. Its sophisticated volume control employs Vishay Dale resistors and high-quality relays for precise, smooth adjustments. The dual-mono design ensures exceptional channel separation, contributing to outstanding stereo imaging and musical transparency across an expansive bandwidth.
$35975.00
Owner Satisfaction
4.8
/ 5
Category Rank
12
/ 58
#12 in Audio Amplifiers
Price vs Category Average
+131%
Above average
Frequency Response
023
/ – MHz (– dB)
Who it's for
- Listeners demanding precise reproduction of complex musical transients
- Audiophiles seeking absolute sonic purity and transparency
- Vinyl enthusiasts wanting reference-grade phono playback
Who should skip it
- Budget-conscious buyers looking for accessible high-end audio
- Owners of modest systems unable to support extreme resolution
- Users requiring integrated digital-to-analog conversion capabilities
Performance breakdown
Signal Transparency
Virtually zero coloration ensures the original recording remains entirely untouched.
Channel Separation
Dual-mono architecture creates a wide, precise soundstage with pinpoint imaging.
Volume Precision
Discrete resistor network provides smooth, accurate adjustments at any listening level.
Bandwidth Performance
Extensive frequency response captures every nuance from the deepest lows to highs.
Build Integrity
Robust construction and high-capacity power supply ensure long-term, stable operation.
Signal Integrity
Advanced input buffering maintains purity even over long cable runs.
Key Specs
Frequency Response
0 – 2MHz (– 3 dB)
Total Harmonic Distortion (THD)
< 0.0001%
Spot Noise
< -140dBV/sqrt(Hz)
Analog Inputs
2 x XLR (balanced), 2 x RCA (unbalanced)
Analog Outputs
1 x XLR (balanced), 1 x RCA (unbalanced)
Dimensions (WxDxH)
430 x 350 x 142 mm
Weight
~10kg
Power Supply Storage
> 400,000 μF
Features
- Precise volume control with discrete steps
- Dual-mono construction for superior channel separation
- Input buffering for signal integrity
- Robust output stage for long cable runs
- Exceptional musical transparency and imaging
- High-capacity power supply for stable performance
- Minimizes stereo crosstalk
- Isolates unselected inputs
What customers say
Owners of the 525 preamplifier express profound satisfaction, viewing it as a benchmark in ultra-high-fidelity audio. The core theme is its extraordinary sonic purity and neutrality. Users consistently report that the unit presents source material with unparalleled realism, speed, and detail retrieval. It handles complex musical passages without congestion or coloration, creating a vast and precisely layered soundstage. The flawless build quality, rooted in Swiss engineering, reinforces its status as a premium, long-lasting investment. While the cost is high, purchasers consider the 525 an endgame component due to its reference grade performance and signal integrity. It achieves near-perfect fidelity, setting a definitive standard for high-end preamplification.
Know before you buy
The dual-mono construction physically separates the left and right channels, which effectively minimizes crosstalk. This results in a more expansive soundstage and improved stereo imaging, allowing you to hear exactly where each instrument is placed in the recording.
Yes, the 525 features a robust output stage specifically designed to drive long cable runs without signal degradation. You can confidently place your power amplifiers further away from the preamplifier if your room layout requires it.
Instead of a standard potentiometer, the 525 uses a sophisticated array of high-quality relays and Vishay Dale resistors. This ensures that volume adjustments are precise and maintain signal integrity without introducing noise or channel imbalance.
The input buffering isolates your source components from the rest of the circuit, ensuring that the preamplifier does not load down your source. This keeps the signal pure and prevents unselected inputs from interfering with the active signal path.
Yes, the unit is versatile and includes two XLR balanced inputs, two RCA unbalanced inputs, and both XLR and RCA outputs. This allows for seamless integration into a wide variety of high-end audio setups.
With over 400,000 μF of storage, the power supply provides a massive, stable reservoir of energy. This ensures the preamplifier can handle complex musical passages with ease, maintaining transparency and dynamics even during demanding listening sessions.
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$35975