4ms Row Power 45 Review: Clean, Reliable Eurorack Power for Growing Modular Synth Systems
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If you’re building a Eurorack modular synthesizer, one of the most important investments you can make is choosing a reliable power supply. Stable, clean power helps reduce unwanted noise, keeps sensitive modules performing properly, and gives you confidence as your system expands. The 4ms Row Power 45 has become a favorite among modular enthusiasts because it combines efficiency, expandability, and exceptionally clean power in a compact design.
Whether you’re powering a small portable case or a larger multi-row Eurorack setup, the Row Power 45 offers an elegant solution that grows with your modular synthesizer.
Why Good Eurorack Power Matters
Every oscillator, filter, sequencer, effects processor, and utility module depends on clean and stable power. Poor-quality power supplies can introduce unwanted noise, voltage fluctuations, and reliability issues that become increasingly noticeable as your modular system grows.
The 4ms Row Power 45 is designed specifically to avoid these problems by providing individually regulated power rails using high-quality electronic components.
Key Features of the 4ms Row Power 45
Plenty of Power for Most Eurorack Systems
The Row Power 45 delivers more than enough power for three typical rows of Eurorack modules, making it an excellent choice for medium-sized modular systems. Whether you’re creating ambient soundscapes, techno rigs, experimental patches, or generative music, it provides dependable power for a wide variety of modules.
Daisy-Chain Multiple Units
One of the biggest advantages of the Row Power 45 is its expandability.
It includes two power input/output jacks, allowing multiple Row Power units to be daisy-chained together. Instead of purchasing separate power bricks for every case or row, a single laptop-style power brick can often power three to five rows or multiple 4ms Pods, simplifying cable management while reducing clutter.
This makes expanding your Eurorack system much easier as your collection of modules grows.
Convenient On/Off Switch
Unlike many Eurorack power solutions, the Row Power 45 features an integrated power switch.
The switch allows you to turn your modular system on or off without disconnecting your power brick, while still maintaining the daisy-chain connection to additional Row Power units. It’s a small feature that quickly becomes one you’ll appreciate during everyday use.
Ultra Clean Regulated Power
The Row Power 45 was engineered with audio performance in mind.
Each voltage rail is separately regulated using premium-grade components, helping deliver exceptionally clean power throughout your modular system. This design minimizes electrical noise and contributes to quieter operation, allowing your oscillators, filters, effects, and digital modules to perform at their best.
For musicians recording directly from their modular synthesizers, clean power is especially valuable.
Efficient Operation That Runs Cool
Power supplies naturally generate heat, but excessive heat can shorten component life and warm your Eurorack case.
The Row Power 45 is highly efficient, meaning it operates cool even during extended patching sessions. Lower operating temperatures help improve long-term reliability while keeping your modular system comfortable during live performances or marathon studio sessions.
Ideal for Portable Eurorack Cases
If you enjoy performing live or building compact modular rigs, the Row Power 45 is an excellent match for portable Eurorack cases. Its efficient design helps maximize available power while minimizing heat, making it perfect for travel-friendly systems and desktop modular setups.
The daisy-chain capability also makes it easy to expand from a small portable case into a larger studio configuration without replacing your existing power solution.
Final Thoughts
The 4ms Row Power 45 offers an outstanding balance of clean power, expandability, efficiency, and ease of use. Features like individually regulated rails, cool operation, integrated power switching, and simple daisy-chaining make it one of the most practical Eurorack power supplies available.
Whether you’re assembling your very first modular synthesizer or expanding into a larger multi-row system, the Row Power 45 provides the dependable foundation your Eurorack modules deserve. Reliable power may not be the most glamorous part of a modular synthesizer, but it’s one of the most important—and the 4ms Row Power 45 delivers exactly that.
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