FAQ
Yes, the MU2 features a high-performance analog preamplifier with a unique volume control mechanism. The volume is regulated by a purely analog network of relay-controlled, high-precision resistors. This method is transparent, free from digital attenuation, and guarantees maximum sonic quality across the entire volume range without compromising resolution—an essential feature for a true High-End Hi-Fi Music Streamer.
The MU2 is primarily a Roon Ready device. Using Roon (a separately available music management system), you gain access to major streaming services like TIDAL and Qobuz in the highest possible quality. Roon also serves as the intuitive and feature-rich interface for controlling and managing your entire music library. Additionally, the MU2 can be controlled via the dedicated Grimm Audio App.
From a tuning expert perspective, the Synergistic Research Master Fuse ranks among the very best choices, as it clearly outperforms many conventional and audiophile fuses in terms of resolution, spatial imaging and musicality. Its developer, Ted Denney, has invested extensive effort and know-how into materials, construction and treatment, with the goal of minimizing the bottleneck effect in the power path and unlocking more microdetail, depth and three-dimensional soundstaging from high-end systems.
A high-quality speaker cable plays a decisive role in preserving the signal integrity between amplifier and speakers. Poor-quality or undersized cables can cause signal loss, distortion, or tonal imbalance. In high-end systems, cables are not passive accessories but essential components that enable the system to perform as a coherent whole.
The MU2 provides a comprehensive range of digital and analog connections, ensuring flexibility in any high-end system:
Analog Outputs: 1 pair of XLR outputs (balanced) and 1 pair of RCA outputs (unbalanced).
Analog Inputs: 1 pair of RCA inputs (unbalanced) and 1 pair of XLR inputs (balanced).
Digital Inputs: 1 x AES/EBU (XLR), 2 x S/PDIF (RCA), 2 x Optical (Toslink).
Network: 1 x Ethernet (RJ45) for streaming and control.
Storage: Internal SSD slot for local music file storage.
Sync: BNC connector for external clock synchronization (optional).
Fine fuses can be differentiated by size (for example 5×20 mm or 6.3×32 mm), by their time-current characteristic (slow-blow “T” or fast “F”), and by materials and construction. In the audiophile sector, you will find versions with special alloys (such as silver/gold), ceramic instead of glass bodies, and additional treatments like cryogenic or “quantum” processing, all intended to further reduce contact resistance and negative effects on current flow.
You can buy all IGS Audio products directly from Falkenstein Pro Audio – your professional pro audio retailer based in Germany. We offer worldwide shipping and expert advice on all IGS studio gear, including compressors, EQs, and preamps.
Yes. The cross-sectional area determines the cable’s resistance. A cable with too small a gauge (thin wire) increases resistance, which can reduce dynamics and clarity—especially over long distances. For home hifi, 2.5 mm² to 4 mm² cables are typically recommended; for high-power or long runs, 6 mm² or more ensures optimal transmission.
The “best” cable matches your amplifier, speaker impedance, and the sonic character you want. Oxygen-free copper (OFC) cables are standard for their balance of conductivity and durability. Multi-strand, well-shielded designs minimize interference. In the high-end range, some prefer hybrid or silver-plated conductors for enhanced detail and openness.
Yes, Synergistic Research fuses have a direction (polarity) that is important for achieving optimal sound quality. The direction is often indicated by the writing on the fuse (for example, from the S in “Synergistic” to the H in “Research”), meaning the current should flow from left to right. In addition, the fuse requires a burn‑in period of about 200–300 hours to reach its full sonic potential.
How to identify the correct direction:
Writing direction: The labeling (e.g., "Synergistic Research") indicates the flow direction — current should go from left to right, from the “S” to the “H.”
Listening test: If you’re unsure, insert the fuse in both directions and listen. The correct direction will sound more detailed, open, and natural.
Polarity tester: Use a phase tester to check the correct orientation of your connected devices — this also applies to the fuse.
Important notes:
Burn‑in time: The first 200–300 hours are crucial for the fuse’s sound development.
Sound differences: When oriented correctly, the sound becomes more detailed, clear, and spatial.
Function: In case of a short circuit, the fuse will still blow even if installed in the wrong direction — but you’ll lose the sonic advantage.
Copper offers an excellent compromise between conductivity, mechanical stability, and cost-efficiency. While silver conducts slightly better (about 6 % higher conductivity), it oxidizes differently and is more expensive. Therefore, pure copper or silver-plated copper provides the best balance between performance and longevity.
The most common materials are:
OFC (Oxygen-Free Copper): Excellent clarity and low resistance.
OCC (Ohno Continuous Cast Copper): Ultra-pure and highly conductive for refined signal transfer.
Silver or Silver-plated copper: Higher conductivity and enhanced high-frequency response. For most high-end systems, OCC or silver-plated OFC cables deliver outstanding results.
Yes—provided the rest of the system has matching resolution. In a refined hifi setup, better conductors, dielectric materials, and construction (twist geometry, shielding, termination quality) can significantly affect soundstage, spatial precision, and tonal naturalness. However, with budget systems, the differences become less noticeable.